The planet Jupiter, a gas giant and the king of our Solar System, has just been measured as slightly smaller than what is ...

New data from NASA's Juno orbiter reveals Jupiter is slightly smaller and more 'squashed' than scientists previously thought.

Jupiter is the largest planet in our Solar System and the fifth planet from the Sun. It is a massive gas giant made mostly of hydrogen and helium, the same elements that form stars.

Scientists using Juno report Jupiter is smaller than previously thought, enhancing understanding of its shape, interior density, gravitational field, and comparison to other gas giant planets ...