An accidental discovery might change how we think about one of the most mysterious structures in our solar system.

We Earthlings see the sun every day of our lives—but gaining a truly new view of our star is a rare and precious thing. So ...

The images come courtesy of a spacecraft called Solar Orbiter. Led by the European Space Agency (ESA) with contributions from ...

Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System — a ...

Simpson's paper, "How might a planet between Mars and Jupiter influence the inner solar system? Effects on orbital motion, obliquity, and eccentricity," was published in Icarus, a journal devoted ...

The object’s aphelion—the farthest point on the orbit from the sun—is more than 1,600 times that of Earth’s orbit,” Institute ...

ESA has just released the first-ever images taken of the Sun's south pole, as seen this year by the Solar Orbiter spacecraft.

Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

A computer simulation predicts that the Rubin Observatory will discover millions of previously undetected objects in the ...

A recent Venus flyby pushed the spacecraft out of Earth's orbital plane, allowing it to gaze at the solar poles.