Will Green Hydrogen Power The Future?

Hydrogen is a clean-burning molecule, meaning that it can help to decarbonize a range of sectors that have proved hard to clean up in the past. But today, most hydrogen is produced from CO2-emitting fossil fuels. Hydrogen produced from renewable electricity, known as Green Hydrogen, could be the solution to cutting our carbon footprint. But first, it must overcome a number of challenges.

today my article is about  "Will Green Hydrogen Power The Future?", Lets start ..

Humanity is facing an uphill battle when it comes to preserving our planet. in order to avert some of the worst effects of climate change experts say that we need to stop global temperatures from rising 1.5 degrees celsius above pre-industrial levels, to do this global carbon emissions need to drop to zero by 2050. it will take a variety of solutions to achieve this goal but one tool that's gaining traction is green hydrogen. 

Green Hydrogen is hydrogen that's been produced exclusively from renewable power. The advantage of green hydrogen is that it's a clean burning molecule meaning that it can help us to decarbonize a range of sectors that have proved hard to clean up in the past this includes the chemical, iron and steel industries as well as transportation especially long haul. Hydrogen can also be used to heat our homes and store renewable electricity that would otherwise be wasted. if we are serious about decarbonization, if we are serious about going into a world which have zero carbon emission, there is no choice but using hydrogen renewable energy can get you so far actually up to 50% to 60% reduction in total emission in the world, because there are a lot of other industries and downstream products which are still emitting but have nothing to do with renewable energy and hygiene could be the solution, the catch because hydrogen is very reactive it's not found freely in nature. It only exists combined with other elements for example water is a combination of two hydrogen atoms and one oxygen atom. So to get hydrogen you must produce it by extracting it from naturally occurring compounds like water.

It's an energy-intensive process and although hydrogen itself is a clean molecule most of the hydrogen produced in the U.S today, H2 is extracted from fossil fuels in a pollution-heavy process .Globally hydrogen production is responsible for around 843 metric tons of carbon dioxide every year. that's equivalent to the yearly co2 emissions of Indonesia and the United kingdom combined. that's why green hydrogen is so appealing but producing it is still very expensive and although costs are coming down. A number of other challenges remain including the lack of infrastructure to transport and store it and the fact that fuel cells which convert hydrogen to usable energy for cars are still very expensive, still solutions are coming and overcoming some of these challenges could propel the hydrogen market to 2.5 trillion in direct revenues by 2050. hydrogen can be produced in a number of different ways experts categorize the sources and processes by which hydrogen is derived using colors the overwhelming majority of hydrogen today is produced from fossil fuels.

Brown Hydrogen: is created through coal gasification.The process for producing grey hydrogen from natural gas throws off carbon waste. Blue hydrogen uses carbon capture and storage for the greenhouse gases produced in the creation of Grey hydrogen.

Gray Hydrogen: accounts for three quarters of all hydrogen production in the world and is extracted from natural Gas via a method known as steam methane. Reforming a downside to both these processes is that they emit large amounts of co2.

Blue Hydrogen: Blue Hydrogen refers to hydrogen produced using natural gas, with the CO2 emissions generated during the process captured and stored. The proposed development, described by BP as the United Kingdom's “largest hydrogen project,” would be based in Teesside, North-East England.

Green Hydrogen: Another way to produce hydrogen is through a method known as electrolysis, here a device known as an electrolyzer splits a compound into its constituent elements using an electric current in this case the compound is fresh water which is split into hydrogen and oxygen if the electricity comes from renewable sources like wind and solar the subsequent hydrogen is known as Green.

Hydrogen Use Of Today:

Around the world the majority of hydrogen today is used in industry including Oil refining  Ammonia Production, Methanol Production, and Steel Production, but recent advancements in Green hydrogen production and storage combined with a global push towards sustainability means that green hydrogen is becoming much more appealing for a number of different industries and nations are seeing the potential.

Europe is the leader part of the green deal which is up to one trillion euros of incentives of green initiatives in the next 10 years give or take half of it is actually being directed to hydrogen so close to a half a trillion of euros in the next 10 years 2050 said by," Ursula von der Leyen, the president of the European Commission, said in a statement issued Tuesday.15-Jan-2020

China actually have strong targets to increase quite dramatically their production of energy plus to move their car fleets from a combustion engine to hydrogen. China's parliament will send inspection teams throughout the country to ensure regions are prioritizing renewable energy resources, the official Xinhua news agency reported, in a bid to cut waste and boost the sector's profitability.

South Korea is very focused about fuel cells and about the automotive market moving to hydrogen. South Korean officials are looking for new technologies to replace existing power generation, and the country has become a world leader in the deployment of fuel cells for utility-scale power generation.

Japan How Toyota is helping Japan with its multibillion-dollar push to create a Toyota's Mirai is a hydrogen cell fuel based vehicle along with 160 fueling stations and 1.4 million residential fuel cells, known as Ene-Farms. ... tag of some $60,000 before incentives, one of several factors that have limited sales.

In the U.S President-elect Joe Biden has also made a big pledge to fight climate change we're going to invest 1.7 trillion dollars in securing our future so that by 2050 the United States will be 100 clean energy economy back in october, the u.s department of energy also announced that it would invest up to 100 million dollars to advance hydrogen production and fuel cell technologies research and development.

A Fuel Cell Stack 

The first industry hydrogen has the potential of transforming is transportation where hydrogen can act as a direct replacement of gas and diesel and holds some advantages over electric vehicles because hydrogen is an energy carrier and not an energy source itself. Hydrogen fuel must be transformed into electricity by a device called a fuel cell stack, before it can be used to power a car inside each individual fuel cell, the process looks something like this hydrogen drawn from an onboard pressurized tank reacts with a catalyst most often this catalyst is made from expensive platinum as the hydrogen passes through the catalyst it's stripped of its electrons which are forced to move along an external circuit and consequently produce an electrical current, this electrical current is then used by the electric motor to power the car the only byproduct is water vapor.

H2 Fuel Cell Cars Advantage

Of course the advantage of hydrogen fuel cell cars over conventional cars, is the possibility of having a zero carbon footprint, but if you have to go through the trouble of converting hydrogen to electricity to use it in cars why not just use battery powered cars, the difference between a battery electric vehicle and a hydrogen fuel cell vehicle, is that you essentially get a much faster refueling times five minutes for the hydrogen fuel cell vehicle compared to 45 minutes for the battery vehicle, you also with a hydrogen fuel cell vehicle get about five times better energy storage per unit volume and weight. So that frees up more room in the automobile for other things passenger space, storage space and also allows you to go further. So you're going to get along the ranges with a fuel cell vehicle experts believe that hydrogen fuel cell vehicles can be especially effective when it comes to long-haul trucking and other hard to electrify sectors such as freight shipping and long-haul Air travel, All applications where using heavy batteries would be inefficient. The larger the vehicle or the device that you're talking about the bigger, The advantage to hydrogen it gets to the point with a truck an 18-wheel truck that using a lithium battery would be almost ridiculous your entire truck would have to be a lithium battery to make it practical or else the truck driver would have to be charging up the truck all the time instead of driving it, but adoption of hydrogen fuel cell vehicles has been slow globally there were more than 18000 hydrogen fuel cell vehicles on the road at the end of 2019. by comparison, there were 7.2 million Electric Cars on the road. Today only three car companies offer hydrogen fuel cell passenger vehicles Honda Hyundai and Toyota and they all cost around 60 thousand dollars, that's twice the cost of some entry-level evs hyundai along with toyota and its truck subsidiary Hino are also working on hydrogen fuel cell trucks.

Total Oil and Gas

France's Oil and Gas giant Total recently invested in hydrogen fuel cell Truck and Bus startup Hyzen Motors and Nikola motors has said that it will begin consumer production of its hydrogen fuel cell truck in 2023.

Hyzon Motors, based in Rochester, New York, is focused on medium- and heavy-duty vehicles (buses and trucks) fueled by hydrogen fuel cells. A spinoff of Singapore-based Horizon Fuel Cell Technologies, Hyzon expects to be able to deliver about 5,000 of its trucks and buses by the end of 2023. The transaction with Decarbonization Plus values Hyzon at $2.1 billion, and the combined company (which will retain the Hyzon name) will have about $576 million in cash, which it said is sufficient to fund its near-term business plan. 

A fuel cell truck startup, has agreed to go public via a merger with Decarbonization Plus Acquisition Corp., according to people with knowledge of the matter. Hyzon says it already has more than 400 commercial vehicles on the road using its fuel cell technology. It expects to deliver about 5,000 fuel cell-powered trucks and buses by 2023 and is targeting annual capacity of around 40,000 fuel cell-electric vehicles by 2025.

But one company not convinced of the advantages of the fuel cell truck is tesla. Tesla is instead working on an electric semi truck which it hopes to start delivering in 2021, Ceo Elon Musk
has even gone as far as calling fuel cell technology mind-bogglingly stupid a big barrier to the adoption of hydrogen fuel cell vehicles has been a lack of fueling station infrastructure because even though fuel cell cars refuel in a similar way to conventional cars they can't use the same stations worldwide.

(Hydrogen is basically a “big pain in the arse”, and is a crazy alternative to battery electric vehicles, says Tesla’s CEO and co-founder Elon Musk.Hydrogen is touted as a solution to long-range transport needs such as trucks and shipping, and there are a number of developers of hydrogen transport options both overseas and in Australia, such as legacy automakers Toyota and Hyundai and start-ups like Hyzon Motors.But Musk says it makes way more sense to use batteries).

there are only 407 operational hydrogen stations today the majority are located in Europe followed by Asia and finally North America. In the U.S there are just over 40 public hydrogen fuel stations with all but one in california. You have to build the stations you have to build the refining capability. you have to have the trucks that can move hydrogen to the stations or the pipes under the ground to move them to the stations. Aside from the infrastructure one point, that is frequently brought up as a problem with hydrogen fuel is its inefficiency. that's because by the time that hydrogen fuel is manufactured transported and distributed and transformed to electricity in the fuel cell seventy percent of its efficiency is lost. This challenge is mitigated somewhat by the fact that hydrogen is very energy dense.

Hydrogen Fuel Efficiency Comparison with Other Fuels

Meaning that it can hold a lot of energy in a small volume, when you buy a kilogram of hydrogen, you're buying the same amount of energy as buying a gallon of gasoline. The difference is when you go to then convert that hydrogen into useful propulsion of your car it's about two to three times as efficient as burning gasoline, because it's an electrochemical reaction it's not combustion. So it's much more efficient so you can immediately divide today's cost of hydrogen by about two or maybe two and a half times so the goal is to get hydrogen for vehicles to be down around the cost of today's liquid fuels gasoline and diesel along with the cost of hydrogen. 

The cost of fuel cell car components and storage also needs to come down it is still it's very expensive today to produce a fuel cell without subsidies government intervention or anything. The cap can get as high as 50,000 per unit hydrogen has to be kept under a huge amount of pressure so you do have to have very expensive extremely high pressure tanks. New developments are starting to make fuel cell technology and hydrogen storage a bit more affordable but scaling it will take time. 

The Company Kubogen has been working on a new hydrogen storage material. so you get basically four to five times more hydrogen in the same space, so your tank can be smaller or you can get longer range or any combination of the two and the cost is actually projected to be four to five times cheaper for the entire system than a current 700 bar system and it gets to the point with our material that the only cost factor when comparing a battery vehicle to a hydrogen fuel cell vehicle is the cost of the fuel cell and not the cost of the storage system.

Storing Renewable Energy

Another application for hydrogen that has experts excited is the ability to use it for storing renewable energy, that would otherwise be wasted what's really made hydrogen come on the scene now is the simple fact that we have so much renewable power on the electric grid in places like california and texas which we didn't have 15 years ago but with all this renewable power on the grid we are now getting substantial curtailments of electricity which is a  market signal that we need storage and so the reason hydrogen's really caught on right now is people are realizing it's really sort of an ideal way to store renewable power for long periods of time.

Mitsubishi, Magnum team up on 1,000 MW Clean Energy Storage Project

Mitsubishi Power along with fuel storage company Magnum Development are working on a project in utah which promises to build a storage facility for 1,000 megawatts of clean power partly by keeping hydrogen and salt caverns scheduled to be operational by 2025. The advanced clean energy storage project would be the largest clean energy storage system in the world so we're going to build a very large electrolysis system that will be able to convert renewable power into hydrogen and then we're going to store that hydrogen in that salt dome for long periods of time so that it can be used when the grid needs the electricity instead of when it's produced. 

(Researchers in Germany have identified salt caverns as a feasible and flexible solution for hydrogen storage. They also revealed that Europe has the potential to inject hydrogen in bedded salt deposits and salt domes, with a total storage capacity of 84.8 PWh.16-Jun-2020).

Intermountain Power Project

The hydrogen stored in the salt mines will be used by a power plant next door the Intermountain Power Project, which is in delta utah is the last coal-fired power plant that's providing power to the state of california and it's scheduled to be retired in 2025. intermountain power has elected our equipment to repower that power plant with gas turbines. but they've asked us to make these the first heavy duty gas turbines ever that can provide this power with a mixture of natural gas and hydrogen.

Paul Browning (President & CEO of Mitsubishi Powers America) says that initially the gas turbines will use 30% hydrogen and 70% natural gas but the goal is to use 100% green hydrogen by 2045. Phase one of our ACES (Advance Cleaning Energy Storage) project is going to be capable of 150 000 megawatt hours of energy storage and 150,000 megawatt hours is enough to fuel 30% of an 840 megawatt power plant and 840 megawatts is enough power to supply one-seventh of the peak needs of the city of Los Angeles. 

Today companies like Nextera Energy, Eos Energy, and even Tesla store  excess renewable energy and batteries but there's a big drawback, if you're only storing electricity for a short period of time it's much better to store it in a battery, you can do that at a lower cost so there's a better efficiency to that storage process, but if you want to store electricity for a long period of time, battery storage gets more and more expensive you have to build more and more batteries.

To be at hygienic Scale

Whereas with hydrogen, we can store it underground in large salt domes for long periods of time at very low cost. Hydrogen's versatility means it has the potential to disrupt many avenues of our economy from energy production and storage to transportation in industrials. In fact, analysts think that by 2050 . Clean hydrogen could account for an estimated 22 percent of our energy needs up from just four percent of the energy that hydrogen supplies today, but this would require massive amounts of additional renewable electricity generation. One study estimates that generating enough green hydrogen to meet a quarter of our energy needs would take more electricity than the world generates today, from all sources combined and an investment of 11 trillion dollars in production storage and transportation infrastructure. Still analysts say we're moving in the right direction, we actually see a complete dive down of hydrogen production cost which has been dropped from two sources electrolyzer prices are down 50% in five years and the second element which is renewable energy costs which are also down between 50 to 60 percent already and we believe both of them will go down another 60 to 70 percent. Before the end of the decade as you get that scale of fuel cells in trucks and other applications going up costs, will come down. You'll start to see other applications emerging it, all comes down to economics so that's really what the goal is get that cost of the green hydrogen down, where it starts to displace some of these fossil fuels. Many experts believe that these advancements can't come without government policy and investment. To some degree governments are already stepping in 50 years, i believe that hydrogen is going to be a very integral part of our life if we are serious about decarbonization, we just have no choice but to have hygiene in scale....

this is the end till now , as per given information in the article we should appreciate those people who made the pledges about saving the planet.

i hope you will enjoy reading this article ,need your comments.

Regards 

Our Solar System Exploration The 2nd Part

"He made this vast universe, from the immense skies, stars and planets to the atom and it's infinitesimal components."

Recap  ..In the first part, we discused Sun and Terrestrial Planets The Planets Mercury, Venus, Earth, and Mars, are called Terrestrial because they have a compact, rocky surface like Earth's terra firma (dry land; the ground as distinct from the sea or air..)  The terrestrial planets are the four innermost planets in the solar system. In Short , Their distance from the Sun , Orbital Speed, Rotation on Axises, Temprature , Atmospheric Pressure and Conditions To live ...etc etc.

Let's Start the 2nd part..........

The Jovian planets include gas giants Jupiter and Saturn and ice giants Uranus and Neptune.

The Gas Giants are predominantly made of helium and hydrogen, and the ice giants also contain rock, ice, and a liquid mixture of water, methane, and ammonia. All four Jovian planets have multiple moons, sport ring systems, have no solid surface, and are immense. The largest Jovian is also the largest planet in the solar system.

Jupiter."Planetary heap as king"

Born from Primordial stardust, 4.5 billion years ago, Jupiter was the solar system's first planet and much like its namesake, the king of the Ancient Roman gods, Jupiter was destined for greatness. Jupiter is the fifth planet from the sun, and the largest planet in the solar system. At approximately 11 earths wide, Jupiter has twice the amount of mass as the other planets put together. But, unlike Earth, and the three other terrestrial worlds, Jupiter has no solid surface. It may not even have a traditionally solid core. Rather, this giant planet may have a dense, liquid center surround by a worldwide ocean of hydrogen and helium gases.

Jupiter's Gassiest composition can be observed in its atmosphere. About 44 miles thick, the atmosphere is a canvas of stripes and storms, churning across the giant planet. Their colors range between shades of whites, yellows, browns, and reds, all caused by the different chemical make up of each area. Probably the most iconic feature of Jupiter, is a crimson brown storm that's been raging for over 300 years. 

The Great Red Spot:

It's a giant, swirling collection of clouds with wind speeds of up to 400 miles per hour, at least two and half times faster than category five hurricanes. Floating hundreds of miles above the storms of Jupiter. its Distance from the Sun is 778.5 million km, Mass is 1.898 × 10^27 kg (317.8 M⊕), Surface area is  61.42 billion km² and  Radius is 69,911 km.

Inside Jupiter Planet: Jupiter is made up almost entirely of hydrogen and helium. On the surface of Jupiter–and on Earth–those elements are gases. However inside Jupiter, hydrogen can be a liquid, or even a kind of metal. These changes happen because of the tremendous temperatures and pressures found at the core.

Orbit and Rotation: Jupiter is the fifth planet from the Sun and the largest in the Solar System. Orbital period is 12 years,13.07 km/s , (29,236 miles per hour), or a period of about 11.86 years around the sun. hence The orbital speed of Jupiter is less than the orbital speed of the earth.

(There are about 79 moons, the most of the Eight known Planets. The four largest moons were discovered by Galileo in 1610. Called the Galilean Satellites. will be discussesd in the next blog.)

Planet Saturn: Saturn is the sixth planet from the Sun and the second largest planet in our solar system. Adorned with a dazzling system of icy rings, Saturn is unique among the planets. It is not the only planet to have rings, but none are as spectacular or as complex as Saturn's. Like fellow gas giant Jupiter, Saturn is a massive ball made mostly of hydrogen and helium.The farthest planet from Earth discovered by the unaided human eye, Saturn has been known since ancient times. The planet is named for the Roman god of agriculture and wealth, who was also the father of Jupiter.

Size and Distance: With a radius of 36,183.7 miles (58,232 kilometers), Saturn is 9 times wider than Earth. If Earth were the size of a nickel, Saturn would be about as big as a volleyball. From an average distance of 886 million miles (1.4 billion kilometers), Saturn is 9.5 astronomical units away from the Sun. One astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. From this distance, it takes sunlight 80 minutes to travel from the Sun to Saturn.

Orbit and Rotation: Saturn has the second-shortest day in the solar system. One day on Saturn takes only 10.7 hours (the time it takes for Saturn to rotate or spin around once), and Saturn makes a complete orbit around the Sun (a year in Saturnian time) in about 29.4 Earth years (10,756 Earth days). Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt. This means that, like Earth, Saturn experiences seasons.

Inside Saturn Planet: Like Jupiter, Saturn is made mostly of hydrogen and helium. At Saturn's center is a dense core of metals like iron and nickel surrounded by rocky material and other compounds solidified by the intense pressure and heat. It is enveloped by liquid metallic hydrogen inside a layer of liquid hydrogen—similar to Jupiter's core but considerably smaller. It's hard to imagine, but Saturn is the only planet in our solar system whose average density is less than water. The giant gas planet could float in a bathtub if such a colossal thing existed.

Saturn Rings:   

                                              

Saturn actually has many rings made of billions of particles of ice and rock, ranging in size from a grain of sugar to the size of a house. The particles are believed to be debris left over from comets, asteroids or shattered moons. A 2016 study also suggested the rings may be the carcasses of dwarf planets.

The largest Ring spans 7,000 times the diameter of the planet. The main rings are typically only about 30 feet (9 meters) thick, but the Cassini-Huygens spacecraft revealed vertical formations in some of the rings, with particles piling up in bumps and ridges more than 2 miles (3 km) high.The rings are named alphabetically in the order they were discovered. The main rings, working out from the planet, are known as C, B and A. The innermost is the extremely faint D ring, while the outermost to date, revealed in 2009, is so big that it could fit a billion Earths within it. The Cassini Division, a gap some 2,920 miles (4,700 km) wide, separates rings B and A

Planet Uranus:

In ancient times, humans studied the night sky and discovered the worlds of Mercury, Venus, Mars, Jupiter, and Saturn. But beyond this realm of knowledge,another world shined brightly, just waiting to be discovered. Uranus is the seventh planet from the Sun.Its name is a reference to the Greek god of the sky, Uranus, who, according to Greek mythology, was the grandfather of Zeus and father of Cronus. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus has 27 known moons, most of which are named after literary characters. Like Saturn, Jupiter and Neptune, Uranus is a ringed planet.

Size and Distance:  Uranus is the seventh planet from the Sun, forms a distance of about 20 astronomical units appox, or 20 times the distance between Earth and the Sun. With a Radius of 15,759.2 miles (25,362 kilometers), Uranus is 4 times wider than Earth. If Earth was the size of a nickel, Uranus would be about as big as a softball. From an average distance of 1.8 billion miles (2.9 billion kilometers), Uranus is 19.8 astronomical units away from the Sun.

Orbit and Rotation:  Uranus makes a complete orbit around the Sun (a year in Uranian time) in about 84 Earth years (30,687 Earth days). Uranus is the only planet whose equator is nearly at a right angle to its orbit, with a tilt of 97.77 degrees—possibly the result of a collision with an Earth-sized object long ago. This orbit causes each season of Uranus to last that much longer. Theoretically, a human living on Uranus would experience the four seasons only once,but each for about 21 years. Partially due to its distance from the Sun.

Inside Uranas Planet: 

Uranus is one of two ice giants in the outer solar system (the other is Neptune). Most (80 percent or more) of the planet's mass is made up of a hot dense fluid of "icy" materials—water, methane and ammonia—above a small rocky core. Near the core, it heats up to 9,000 degrees Fahrenheit (4,982 degrees Celsius). Uranus is slightly larger in diameter than its neighbor Neptune, yet smaller in mass. Uranus has an Earth-sized core made of iron and magnesium silicate. It is the second least dense planet; Saturn is the least dense of all. Uranus gets its blue-green color from methane gas in the atmosphere. Sunlight passes through the atmosphere and is reflected back out by Uranus' cloud tops. Methane gas absorbs the red portion of the light, resulting in a blue-green color. Next to Uranus is Neptune, the outermost planet in the solar system, and also one of the coldest. 

Uranas Rings:

Saturn is, of course, famous for its majestic rings, but Jupiter, Uranus and Neptune all have ring systems as well. Those ring systems are all much less massive and fainter than Saturn’s, and you need a very powerful telescope or a spacecraft to see them well. But now astronomers have taken some new earth-based thermal images of Uranus’ rings, where they look surprisingly bright. For the first time, researchers were also able to measure the temperature of the rings: a very chilly 320 degrees below zero Fahrenheit (-195 Celsius).

Uranus’ ring system as seen in 2019 by the ALMA and VLT telescopes. The planet itself is masked off as it is much brighter than the rings. Uranus’ rings are normally so faint that they can’t be seen through telescopes. They were only discovered in 1977, when astronomers saw them passing in front of a star, blocking its light. (Image via Edward Molter/Imke de Pater/Michael Roman/Leigh Fletcher, 2019.)

Planet Neptune: Dark, cold and whipped by supersonic winds, ice giant Neptune is the eighth and most distant planet in our solar system. More than 30 times as far from the Sun as Earth, Neptune is the only planet in our solar system not visible to the naked eye. In 2011 Neptune completed its first 165-year orbit since its discovery in 1846. The ice giant Neptune was the first planet located through mathematical calculations. Using predictions made by Urbain Le Verrier, Johann Galle discovered the planet in 1846. The planet is named after the "Roman god of the sea", as suggested by Le Verrier.

Size and Distance: With a radius of 15,299.4 miles (24,622 kilometers), Neptune is about four times wider than Earth. If Earth were the size of a nickel, Neptune would be about as big as a baseball. From an average distance of 2.8 billion miles (4.5 billion kilometers), Neptune is 30 astronomical units away from the Sun. One astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. From this distance, it takes sunlight 4 hours to travel from the Sun to Neptune.

Orbit and Rotation: One day on Neptune takes about 16 hours (the time it takes for Neptune to rotate or spin once). And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years (60,190 Earth days). Neptune’s axis of rotation is tilted 28 degrees with respect to the plane of its orbit around the Sun, which is similar to the axial tilts of Mars and Earth. This means that Neptune experiences seasons just like we do on Earth; however, since its year is so long, each of the four seasons lasts for over 40 years.

Inside Neptune Planet:

Neptune is an ice giant. Most of its mass is a hot, dense fluid of "icy" materials – water, methane and ammonia – above a small rocky core. Neptune's atmosphere is made up mostly of molecular hydrogen, atomic helium and methane. It may have a small, rocky core, and an icy mantle that blends into the atmosphere. Neptune radiates almost three times as much heat energy as it gets from the distant Sun.

Orbiting the Terrestrial planets is the Asteroid Belt, a flat disc of rocky objects, full of remnants from the solar system's  formation. From microscopic dust particles, to the largest known object, the dwarf planet, Ceres. Another disc of space debris lies much further out, and orbits the Jovian planets, the icy Kuiper Belt.

Apart from asteroids, the Kuiper Belt is also home to dwarf planets, such as Pluto, and is the birthplace of many comets. Beyond the Kuiper Belt is the Oort Cloud, a vast, spherical collection of icy debris. It is considered the edge of the solar system, Since that is where the gravitational and physical influences of the Sun end. Our solar system's particular configuration of planets and other celestial objects, all revolving around a life-giving star, make it a special place to call home. 

I hope for the best response from you guys , Each of the gas giant planets can be thought of as its own mini version of the Solar System., Each planet has a large system of moons which are in orbit around it, i will throw light in my next article about Astriod Belt. Inshallah.

see you then.,

Regards...

Tahir Ahmad Dawood