Solar system

This annular solar eclipse will only reveal its full glory to a select few, but onlookers across much of the Western Hemisphere can catch a partial glimpse of the dazzling phenomenon

The equinox is not when day and night have equal lengths. Instead it’s something more nuanced but no less glorious

Jupiter’s mysterious moon Europa may hold carbon in the ocean lurking beneath its icy shell

If it had hit Earth, this coronal mass ejection could have caused continent-scale blackouts, scientists say

Thousands of spacecraft circle Earth. Seeing them from the ground is surprisingly easy—and a lot of fun

Earth is bombarded by millions of bits of cosmic debris every day. Here’s how to distinguish between the different types

Discovered only last month, Comet Nishimura is drawing attention before close approaches to the sun and Earth in the coming weeks

From dim red to brilliant blue, stellar colors span the spectrum—and reveal how much any star brings the heat

The successful lunar landing of the Chandrayaan-3 mission makes India only the fourth country to achieve the feat

Luna-25, Russia's first moon mission in nearly a half-century, was the vanguard of a planned series of lunar probes

Although Arecibo Observatory is slated to become an education center, astronomers hope research might one day return to the site

The Luna 25 spacecraft will attempt to land at the lunar south pole for the first time in a hunt for valuable water ice