The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now. Twice as large, in fact. To put that into context, those ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

Observations of 1 Ceres, the largest known asteroid, have revealed that the object may be a “mini planet,” and may contain large amounts of pure water ice beneath its surface. The observations by NASA ...

In a once-a-year event, Saturn is about to reach opposition, with the ringed planet appearing its best and brightest as it ...