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The Sun plus the collection of bodies in orbit around the Sun such as planets, dwarf planets, moons, asteroids, comets, etc.

20 votes
2 answers
12k views

Why Aren't Saturn's Rings Clumping into Moons?

While reading with my son about how a Mars-like planet collided with the early Earth that resulted in our current moon, it said the initial debris also formed a ring, but that ring ended up getting ab …
LarsTech's user avatar
  • 550
9 votes
1 answer
682 views

Will Neptune change Pluto's orbit some day?

My seven-year-old son loves astronomy-- so much so that we read space books before bed time. One of our books talks about Pluto's orbit crossing over Neptune's orbit and will be (or is) closer to the …
LarsTech's user avatar
  • 550
9 votes
2 answers
557 views

Where will New Horizons go after sailing past Pluto?

The New Horizons Spacecraft is scheduled to whiz by Pluto around 2015, and my understanding is that it is going to do exactly that — whiz by it. Where will it go after that? Or what else can it do o …
LarsTech's user avatar
  • 550