Planent
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The solar system formed approximately 4.6 billion years ago around the Sun. It consists of eight planets in orbit around the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The inner planets are Mercury, Venus, Earth, and Mars. The outer planets are Jupiter, Saturn, Uranus, and Neptune. The planets vary in size, composition, and other properties depending on their position in the solar system relative to the Sun.
Planent
- 2. Solar system The Sun, its planets and all the objects moving around them collectively are called Solar System. The Solar System was formed approximately 4.6 billion years ago and consists of the Sun, planets, dwarf planets and other astronomical objects bound in its orbit. The Solar System is entirely dependent on Sun & the only one which is self- luminous i.e. which has its own light.
- 3. It is the source of all energy for life on Earth. About three quarters of the Sun's mass consists of hydrogen, while the rest is mostly helium. It ‘s the heaviest among solar system. It is a ball of hot ,burning gases.
- 4. The word ‘Planet’ means wandering star. Planets are heavenly bodies ,which revolve around the Sun in elliptical orbits. All planets fall in 2 groups Inner Planets: Mercury , Venus, Mars and Earth are called inner planets. Outer Planets: These are Jupiter , Saturn, Uranus, Neptune
- 5. According to the IAU, there are eight planets in the Solar System. In increasing distance from the Sun, the planets are: Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
- 6. It is the closest planet to the Sun. It is also the smallest, and its orbit is the most not fully circular. It does not have any satellite. There is no water or atmosphere. It orbits the Sun once in about 88 Earth days.
- 7. Venus is surrounded by thick cloud cover ,that is why it is called “Veiled Planet”. It is brightest & hottest planet. It orbits the Sun once in about 225 Earth days. Venus reaches its maximum brightness shortly before sunrise or shortly after sunset, so it is also known as the Morning Star or Evening Star. VENUS
- 8. It is also known as watery planet, because 70% of its surface is covered by water. It reflects about 1/3rd of sunlight it receives. The earth’s atmosphere scatters the light & creates a blue effect ion, so it is also called Blue Planet.. Only planet having life . It orbits the Sun once in about 365 Earth days. Moon is the only satellite of the Earth.
- 9. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance. Mars has approximately half the diameter of Earth It has two satellites. The gravity of Mars is half of the earth.
- 10. Jupiter is the largest planet within the Solar System. It has a great Red Spot ,it is rotating storm system inside the planet. Jupiter rotates faster than any other planet. It completes one rotation in 10 hours. Jupiter has a faint ring system, these rings appear to be made of dust.
- 11. Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn rings are made up of ice & ice covered particles. It has 22 known satellites . Saturn is 95 times heavier than earth. SATURN
- 12. The only planet which rotates on its axis from east to west. It has at least ten thin uniform black rings ,which are made of dust. It has 27 known satellites. It is a very cold planet ,it receives 370 times less sunlight than Earth as it is far away from sun as compared to Earth. Its core is very rocky.
- 13. Most distant gas planet. Most windy planet It has 8 known satellite As it is very far from Sun, it completes an orbit on average every 164.79 years. The average distance between Neptune and the Sun is 4.50 billion km.