A robotic explorer named Juno has launched and is on its way to Jupiter.
The solar-powered probe will have some company when it begins to explore the Jovian system in 2016.
By measuring water on the giant planet, the probe will reveal clues about how it and other planets were born.
Who needs a solar system? Research shows solitary planets may be more common in the universe.
Last year, Jupiter lost one of its trademark stripes. But with a little help from a little moon, an infrared telescope has found where the stripe is hiding.
After some cosmic detective work, it would appear the July 19, 2009, scar in Jupiter's atmosphere was inflicted by a Titanic-sized asteroid and not a comet.
In the year 2 B.C., the strange motion of Jupiter past the bright star of Regulus and eventual conjunction with Venus may have inspired the "Three Wise Men" to travel to Bethlehem.
Armed with telescopes, video cameras and a strong sense of curiosity, amateur astronomers are giving the pros a run for their money.
How do you find out the mass of Jupiter? You could send a space probe there to study the distant world, but there's another way.
After some clever detective work, astronomers think Neptune was hit by a large comet... two centuries ago.