WASHINGTON (Reuters) - Jupiter, the solar system's largest planet, may have been smacked head-on by an embryonic planet 10 times Earth's mass not long after being formed, a monumental crash with ...

Jupiter currently shines as a brilliant silvery "star" in the constellation Gemini the Twins, low in the east-northeast sky ...

A newly discovered exoplanet more than 1,200 light-years from Earth has three times the mass of Jupiter and is the new "king" of its solar system. Known as Kepler-88 d, it replaces Kepler-88 c as the ...

Planetary scientists have long wondered why Mars is only about half the size and one-tenth the mass of Earth. As next-door neighbors in the inner solar system, probably formed about the same time, why ...

In our solar system, Jupiter is the largest planet by far. Jupiter has twice the mass of Saturn and 300 times the mass of the Earth. As big as Jupiter is, scientists have now discovered a distant ...

Gravitational microlensing is the only method capable of exploring the entire population of free-floating planets down to Mars-mass objects, because the microlensing signal does not depend on the ...

Like an ambiguous game of telephone, messages get lost in translation when Mercury squares Jupiter, and no one’s quite sure what’s going on! Read between the lines, or swim in a sea of confusion! On ...