The scientists have concluded that early Jupiter must have started out extremely hot — about 2,000 degrees Fahrenheit. That's a far cry from its modern average temperature of about -170 degrees.

EARLY ARRIVAL Jupiter probably grew a solid core within the solar system’s first million years, making it the first planet to form. Amy A. Simon, NASA, European Space Agency.

Jupiter, the largest planet in our Solar System, is 11 times wider than Earth, and has a mass 2.5 times greater than all of ...

The evidence for Jupiter’s early birth lies in the meteorites scattered all over Earth, according to research published this week in Proceedings of the National Academy of Sciences.

Alibert said Jupiter rapidly grew in its first million years of formation by gathering up centimeter-size pebbles, growing to 20 times the mass of Earth.. However, the next 2 million years saw the ...

When Jupiter was still a young planet, it had a strong appetite. Scientists now believe giant Earths may have smashed into a young Jupiter, causing it to lose part of its core. IE 11 is not supported.

The planet that may have struck Jupiter would have to have been huge, according to the simulations. The researchers estimate that it would have been roughly 10 times as massive as Earth, and it ...

If your pre-dawn sky is clear early Saturday (Sept. 28), you'll see the waning crescent moon will appear to pass close by the largest planet in our solar system: Jupiter. Here's what to look for.

Early risers on Saturday will be treated to a planetary “conjunction” in the predawn sky. NASA says the intermingling of Jupiter and Venus, which will last only two days, will make the planets ...