This post will cover the Part-2 of our Notes on Solar System. Click here to check Our Solar System : Complete Notes for SSC CGL - Part 1. It's an Important topic and questions are being asked from this topic. Anyway, If you want to have a look on some of our previously provided notes or PDF material, Click on below given links:
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- Largest of all planets ( 71% of the total mass of all planets), called Lord of Heavens.
- Jupiter appears to have stopped halfway to becoming a star. It was too massive to solidify as a planet but not massive enough to develop 'nuclear fusion' and become a star.
- Its atmosphere contains hydrogen, helium, methane and ammonia. A great red spot is detected on it. It represents a huge storm-a super hurricane, existing for hundreds of years, without abating. This storm is probably powered by Jupiter's internal heat.
- It has the fastest roation time (9.8 hrs) in the solar system.
- Revolution : 12 years
- It has 63 satellites (prominent are Europe, Gannymede & Callisto). Gannymede is the largest satellite of Solar System.
- Second in size after Jupiter.
- Revolution: 29 yrs. Rotation: 10.3 hrs.
- Least density of all (30 times less dense than Earth).
- Unique feature is its system of rings(3 well defined).
- These are separate particles that move independently in circular orbits.
- 60 satellites ( Prominent is Titan).
- The space probe, Cassini is on Saturn.
- Identified as a planet in 1781 by William Hershel.
- Seems to rotate from North to South as it is inclined at an angle of 98 degrees to its orbit.
- Revolution: 84 yrs. Rotation: 10.8 hrs.
- Surrounded by a system of 9 faint rings.
- Has 27 satellites ( Prominent are Miranda, Ariel, etc.)
- Appears as Greenish Star.
- Revolution: 165 yrs. Rotation: 15.7 days.
- Has 5 faint rings.
- Discovered by J.G Galle of Berlin in 1846.
- 13 satellites.
- Pluto is much smaller than only of the official planet and now classified as a dwarf planet.
- A heavenly body must fulfill certain conditions and then only it can be called a planet.
- There are three requirements defined by IAU
- It needs to be in an orbit around the Sun.
- It needs to have enough gravity to pull itself into a spherical shape.
- It needs to have clear and separate orbit away from the orbits of its neighbours.
- Pluto satisfies condition (1), (2) but not (3). It's orbit cuts through the orbit of Neptune and it is so small that the satellites of many other planets are bigger than Pluto. Hence, it was, declared a Dwarf Planet in 2006.
- Asteroids are a series of very small planets or fragments of planets lying between the orbits of Mars and Jupiter. Also called Planetoids or Small Planet.
- They are thought to be the debris left over from the formation of inner planets.