Solar System

This past Saturday, a speck of light shimmering in the shadows behind Jupiter erupted. And then it kept erupting, with two more violent jets of material firing into space on Sunday, followed by a fourth...

Two red things are hiding in a part of the solar system where they shouldn’t be. Scientists led by Sunao Hasegawa from JAXA, the Japanese space agency, reported in The Astrophysical Journal Letters on...

In the nearly 44 years since NASA launched Voyager 2, the spacecraft has gone beyond the frontiers of human exploration by visiting Uranus, Neptune and, eventually, interstellar space. Last March, the...

Astronomers discovered a planetoid orbiting the sun further than any known object in the solar system. Called “Farfarout,” the object orbits the sun every 1,000 years. Objects like Farfarout...

Our solar system orbits an invisible point at its center called the barycenter, from which its mass is evenly distributed. Even the sun orbits this point — so the center of the solar system doesn't...

Jupiter was struck by ayoung planet with 10 times the mass of Earth about 4.5 billion years ago, a new study suggests. The planet struck Jupiter’score and stirred up the heavy elements inside....

HOUSTON — Is it time to go back to Neptune? Scientists representing NASA’s Jet Propulsion Laboratory proposed a spacecraft and mission on Tuesday at the Lunar and Planetary Science Conference in Texas...

HOUSTON — To Kirby Runyon, a planetary scientist at the Johns Hopkins Applied Physics Laboratory, the small distant object that NASA’s New Horizons spacecraft flew past on the first day of this year...

Astronomers have discovered a far-out world circling the sun. How far out? It’s so far out that the discoverers nicknamed it “Farout.” All they can see is a pinkish dot of light in the night sky,...

NASA’s New Horizons spacecraft spotted a UV glow at the edge of the solar system, hinting at a ‘wall’ of hydrogen all around us. Our sun and all its planets travel through the Milky Way...

Pluto reached opposition on July 12 and won’t align with the rest of the solar system again until the year 2179. This week marked a grand occasion for Pluto enthusiasts. Astronomers and sky watchers...