When my colleagues and I send them out to explore our solar system, it's important for us to understand the 3D map of our space neighborhood.
The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, along with dwarf planets like ...
When I was a kid, there were nine planets. Now we know of thousands! But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might ...
Morning Overview on MSN
How gravity sculpts the universe from Einstein to cosmic magnifying lenses
From the fall of an apple to the glow of the farthest known star, gravity quietly choreographs almost everything that happens ...
Astronomy on MSN
Why don't planets fall into the stars they orbit?
Why don't planets fall into the stars they orbit if they're constantly being pulled by gravity?Lindsey CoughterRocky Mount, North Carolina This is a brilliant question because the notion of an orbit ...
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