Learn how Roemer learned that light does take time to travel.
Every planet with a magnetic field can produce polar lights. So why can't we see Jupiter's?
Saturn's rings are made of the remnants of former moons that were destroyed in a collision.
Europa, Jupiter's moon, has water that may support life. The only problem is it's buried under a thick layer of ice.
Measuring data from the Hubble telescope, NASA has discovered a salt-water ocean on Jupiter's largest moon beneath layers of ice.
Extrasolar planets form along misaligned orbits.
Could the frigid waters of Jupiter's moon Europa host alien life?
If recent research is correct, the blackness between stars harbors more excitement than you could possibly comprehend.
A Moment of Science looks at the many different moons in our solar system.
So, if the planet doesn't orbit a sun, can it still be called a planet?