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Universe 2

The solar system consists of the sun and all celestial bodies that orbit it, including planets, moons, and asteroids. Planets are classified into inner (Mercury, Venus, Earth, Mars) and outer (Jupiter, Saturn, Uranus, Neptune) categories, with Jupiter being the largest and Mercury the smallest. Key points highlight various characteristics of planets and moons, such as the fastest and slowest rotations and revolutions, as well as unique features like the brightest planet (Venus) and the coldest planet (Neptune).

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Jashan Jawanda
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82 views3 pages

Universe 2

The solar system consists of the sun and all celestial bodies that orbit it, including planets, moons, and asteroids. Planets are classified into inner (Mercury, Venus, Earth, Mars) and outer (Jupiter, Saturn, Uranus, Neptune) categories, with Jupiter being the largest and Mercury the smallest. Key points highlight various characteristics of planets and moons, such as the fastest and slowest rotations and revolutions, as well as unique features like the brightest planet (Venus) and the coldest planet (Neptune).

Uploaded by

Jashan Jawanda
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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➢ Solar system: Made up of the sun and everthing that orbits

around it, including planets, moons, asteroids, comets, and


meteoroids.

➢ Classification of planets:
1. Inner Planet : The planets closest to the sun.
Mercury,Venus,Earth,Mars
(Biggest Planet in b/w inner planets is Earth and smallest is
Mercury )
2. Outer Plants :The palnets farest to the sun.
Jupiter ,Saturn,Uranus,Neptune
( Biggest Planet in b/w outer planets is Jupiter and smallest is
Neptune )

Descending order of planets in size:


1.Jupiter 2.Saturn 3.Uranus 4.Neptune 5.Earth 6.Venus 7. Mars
8.Mercury

➢ Dwarf Planets: A round objects in space that goes around the su


but is not as large as planets and have gravitional power.
Examples: Pluto , Ceres , Eris Haumea, Makemake (certified by
IAU)
( Biggest Dwarf Planet is Pluto which is present beyond Neptune
orbit in Kuiper belt and smallest is Ceres which is present in
asteroid belt )

➢ Key Points:
1.Biggest Planet : Jupiter
2.Smallest Planet : Mercury
3. Biggest Satellite : Gannymede (Jupiter )
4. Smallest Satellite : Deimos ( Mars )
5. Blue Planet : Earth
6. Green Planet : Uranus (because of methane gas )
7. Red Planet : Mars ( Presence of iron oxide )
8. Fastest Rotation in solar system : Jupiter ( 9hr 55m)
9. Slowest Rotation in solar system : Venus ( 243 days )
10. Fastest revolution in solar system : Mercury ( 88 days )
11. Slowest Revolution in solar system : Neptune ( 165 years )
12. Brightest Planet : Venus ( because its thick clouds reflect most of
sunlight)
13. Evening Star : Venus
14. Morning Star : Venus
15. Hottest Planet : Venus ( Extremly thick atmosphere 100 times
larger than the atmosphere of earth )
16. Coldest Planet : Neptune
17. Nearest Planet to earth : Venus
18. Nearest planet to sun : Mercury
19. Earth’s twin : Venus
20. Denest Planet : Earth
21. Same number of days for rotation ( 243 days) and revolution
( 224.7 days ) : Venus
22. Only satellite with an atmosphere like earth : Titan ( moon of
Saturn )
23. Sun rise in west and set in the east : Venus
24. Brightest Planet outside solar system : Sirius ( dogstar)
25. Closest star of solar system : Proxima century
26. Planet with maximun number of satellites : Saturn
27. Length of day of which planet is almost identical to earth : Mars
(25 hours)
28. A dying Star ( explosion of star) : Supernova
29. Laws of planetary orbit : Johnnes Kepler
30. Saturn rings discovered by : Galileo galilei
31. Time Required by moonlight to reach the earth : 1.3 sec
32. Time required by sunlight to reach the earth : 8m 20 sec
33. Revolution of sun around the centre of galaxy is called Cosmic
Year.

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