Microscopic crystals extracted from meteorites could help settle a debate about the birth of our patch of the Milky Way.

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

A scale model of the solar system, with each planet depicted in relief on individual square granite markers installed atop concrete bases embedded in the ground. Each planet bears a laser etched ...

Your excellent question affords us the opportunity to distinguish between near-certain astronomical predictions and those which are far less so. Astronomers predict that our home galaxy and the ...

At the ragged frontier where the Sun’s influence gives way to the galaxy, a decades‑old spacecraft has stumbled into a furnace that theory did not predict. As Voyager pushes through the heliopause, ...