Jupiter, the largest planet in the solar system, was 2 to 2.5 times bigger in its earlier life, according to new research. Jupiter, the largest planet orbiting the sun, used to be much bigger and ...

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 ...

Jupiter and Mars are about to get up close and personal to one another. Look up to the sky early Wednesday morning and you'll see what astronomers call a planetary conjunction. This is what is ...

This quiz will challenge your knowledge of Jupiter's features, moons, and the missions that have dared to get close.

Tom Jacobs of Bellevue, Washington, loves treasure hunts. Since 2010, the former U.S. naval officer has participated in online volunteer projects that allow anyone who is interested — “citizen ...

Alongside the planets will be a nearly-full 'sturgeon moon' that will reach peak illumination on August 9. The planet parade will also be followed by the Perseid meteor shower, which will peak on the ...

A planet 100 light-years away that resembles a young Jupiter has been discovered by an international team of astronomers that includes six UCLA scientists. The discovery is reported Aug. 13 in the ...

In the first week of March, two planets will appear side by side in the sky: Jupiter and Mercury. Mercury, the smallest planet, and Jupiter, the largest planet, will meet on March 5 in a celestial ...

Let’s get lucky — and let’s get to listening. At long last, Jupiter — our gas-giant planet of good fortune, abundance, games of chance and inclinations of excess — is going direct in Gemini. After a ...