212K views · 5.1K shares | Jupiter 欄 Saturn It's been nearly 400 years since these two giant planets appeared so close together in the night sky! We've collaborated with Google to share science & info on how to observe this Great Conjunction: https://go.nasa.gov/37C4oiI | NASA - National Aeronautics and Space Administration | Facebook

Jupiter boasts an impressive title: the largest planet in our solar system. It's a gas giant, swirling with thick clouds and a powerful magnetic field. But here's the mind-bender: Jupiter shares some characteristics with stars, the giant balls of burning gas that power themselves with nuclear fusion. Both are mostly made of hydrogen, and Jupiter is truly massive. So why isn't Jupiter a star? | The Brain Maze