The quartet of planets — named b, c, d and e — are some of the smallest rocky worlds ever detected. NASA says each has a mass ...

This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...

Curious about what planets look like through a telescope? This guide breaks down what you’ll see based on your telescope’s size, setup, and observing conditions. Plus tips for clearer planetary views.