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Made by:-  Swaranjali   Garje                      Sai   Tandelkar                       Sanyukta   Khavnikar                       Anushka   Satpute                       Radhika   Bhagat

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Sun is nearest star from us. The Sun is source of almost all  energyon  the Earth. Sun is the main source of energy and heat for not only Earth but also all other  planets.It  is said that Sun is heart of Solar System. It holds 99.8% of the solar system's mass and is  roughly 109 times the diameter of the Earth  and  about one million Earths could fit inside the sun. The sun was born about 4.6 billion years ago. Many scientists think the sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust known as the solar nebula. As the nebula collapsed because of its gravity, it spun faster and flattened into a disk. Most of the material was pulled toward the center to form the sun .

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The sun has enough nuclear fuel to stay much as it is now for another 5 billion years. After that, it will swell to become a red giant. Eventually, it will shed its outer layers, and the remaining core will collapse to become a white dwarf. Slowly, the white dwarf will fade, and will enter its final phase as a dim, cool theoretical object sometimes known as a black dwarf.  It is said that, The sun and the atmosphere of the sun are divided into several zones and layers. The solar interior, from the inside out, is made up of the core,  radiative  zone and the convective zone. The solar atmosphere above that consists of the photosphere,  chromosphere , a transition region and the corona. Beyond that is the solar wind, an outflow of gas from the corona.

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The Mercury is the nearest planet to the sun.  Beacause  it is close to the sun therefore, it is difficult to observe it, as most of the time it is hidden in the glare of sun. Mercury has no own satellite. Geologists estimate that Mercury's core occupies about 55% of its volume; for Earth this proportion is 17%. Research published in 2007 suggests that Mercury has a molten core

Surrounding the core is a 500–700 km (310–430 mi) mantle consisting of silicates. Based on data from the  Mariner 10  mission and Earth-based observation, Mercury's crust is estimated to be 35 km (22 mi) thick. However, this model may be an overestimate and the crust could be 26 ± 11 km (16.2 ± 6.8 mi) thick based on an Airy  isostacy  model.

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Venus is the earth’s nearest planetary  neighbour .  It is often called as morning and evening star. Venus has no own satellite or moon. The atmosphere of Venus is very hot and thick. You would not survive a visit to the surface of the planet - you couldn't breathe the air, you would be crushed by the enormous weight of the atmosphere, and you would burn up in surface temperatures high enough to melt lead.

Scientists found that Venus rotates backwards. This means that on Venus the Sun rises in the west and sets in the east. We've sent a lot of spacecrafts to visit Venus. They found out that Venus' atmosphere is mostly carbon dioxide and sulfuric acid. This is not good air to breathe!

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The Earth is only the planet on which life exist. Because of some special conditions life is possible here. Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface .

Our planet is unique for many reasons, but its available water and oxygen are two defining features. Water covers roughly 71 percent of Earth's surface, with most of that water located in our planet's oceans. About a fifth of Earth's atmosphere consists of oxygen, produced by plants.

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Mars appears slightly reddish therefore, it is also called red planet. Mars has two small natural satellite. Like Earth, Mars has seasons,  polar ice caps, volcanoes, canyons, and weather . It has a very thin atmosphere made of carbon dioxide, nitrogen, and argon. There are signs of ancient floods on Mars, but now water mostly exists in icy dirt and thin clouds .

Mars is a terrestrial planet. It is small and  rocky.Mars  has a thin atmosphere. Mars has an active atmosphere, but the surface of the planet is not active. Its volcanoes are  dead.One  day on Mars lasts 24.6 hours. It is just a little longer than a day on  Earth.One  year on Mars is 687 Earth days. It is almost twice as long as one year on Earth.

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Fifth in line from the Sun, Jupiter is, by far,  the largest planet in the solar system  – more than twice as massive as all the other planets combined. Jupiter's familiar stripes and swirls are actually cold, windy clouds of ammonia and water, floating in an atmosphere of hydrogen and helium.

Jupiter is a gas giant and doesn't have a solid surface, but it may have a solid inner core about the size of Earth. Jupiter also has rings, but they're too faint to see very well .

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Adorned with  thousands of beautiful ringlets , Saturn is unique among the planets. It is not the only planet to have rings – made of chunks of ice and rock – but none are as spectacular or as complicated as Saturn's. Like fellow gas giant Jupiter, Saturn is a massive ball made mostly of hydrogen and helium.

The rings we see are made of groups of tiny ringlets that surround Saturn. They’re made of chunks of ice and rock. Like Jupiter, Saturn is mostly a ball of hydrogen and helium.

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Uranus is  made of water, methane, and ammonia fluids above a small rocky center . Its atmosphere is made of hydrogen and helium like Jupiter and Saturn, but it also has methane. The methane makes Uranus blue. ... And unlike any other planet, Uranus rotates on its side.

Uranus also has faint rings. The inner rings are narrow and dark. The outer rings are brightly colored and easier to see. Like Venus, Uranus rotates in the opposite direction as most other planets.

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Neptune is  the eighth and farthest known Solar planet from the Sun . In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth, slightly more massive than its near-twin Uranus.

Neptune resembles Uranus in its magnetosphere, with a magnetic field strongly tilted relative to its rotational axis at 47° and offset at least 0.55 radii, or about 13,500 km from the planet's physical centre.

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