Unlike typical comets, ‘Oumuamua lacks rock or carbon-rich material. It is also much more elongated than other comets. It ...

Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

Astronomers have directly spotted a rare young planet, WISPIT 2b, still forming within the gap of a dusty ringed disk around ...

Astronomers have discovered a large trans-Neptunian object, 2017 OF201, at the edge of the solar system. Its strange orbit challenges the Planet Nine theory and shows the space beyond Neptune is not ...

Editor's choice: planetary & solar system science This collection brings together research on bodies that span the astronomical size spectrum, from meteors to planetary giants.

categories:Science, Solar System | tags:Because inferior planets orbit closer to the Sun than Earth, they never stray far from their parent star. Innermost Mercury never appears farther than 28 ...

Named 3I/ATLAS, the comet is only the third known interstellar object to enter our solar system, and it's the largest and ...

NASA’s Hubble Space Telescope has snapped images of a recently discovered interstellar visitor hurtling through our solar system. Traveling at 130,000 mph, 3I/ATLAS is the fastest comet ever observed ...

The universe is full of surprises, but two discoveries in the outer solar system are dominating astronomy news this week. First, astronomers reported yesterday that they have found a distant, tiny ...

The U.S. planetary science community is sounding the alarm about plans to discard a nuclear technology that has powered dozens of NASA missions over the past 50 years ...

Kepler data has identified a star with a seven-planet system structured similarly to the sun’s clutch of planets.