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Minggu, 12 Desember 2010

Saturn and Uranus


Saturn

Saturn is second largest planet after Jupiter and one inner planet in our solar system that has ring.

The ring is a lump of ice. Its revolution period is 30 years, while its rotational period = 10.02 hours and its distance to the sun is 1426 billion km. Saturn has more than 20 satellites and among other are Titan and Enceladus.

Saturn has 3 ring layers, so Saturn is planet that most beautiful compared with another planets. Those three rings are:
1. Ring A (outer ring), its diameter is 260,000 km.
2. Ring B (middle ring), its average diameter is 152,000 km.
3. Ring C ( inner ring), its diameter is 160,000 km.

Uranus

The characteristics of Uranus are:
1. Its axis is upright.
2. Its poles face the sun.
3. Its rotation is slow, so its often parallel to its orbit path.


Neptune

This planet is found by John.C.Adam in century 19. its rotational period is 15 hours, its revolution period = 165 years, its distance to the Sun = 4493 billion km, and it has two satellites those are Trition and Nereid.

The diameter of Triton satellite = 14,000 km and it has atmosphere, its shape is almost like Pluto. Meanwhile the diameter of Nereid is about 2000 km. its location if farther than Neptune if compared to Triton. Neptune is called as twin of Uranus. The condition of Neptune is denser than Jupiter and Saturn.