It’s a fall favorite among stargazers, known for bright, speedy streaks that can sometimes linger in the sky for minutes.

Although Kosmos 2612 is now backing away, the maneuver raised alarm bells for analysts who see it as part of a pattern of Russian aggression.

The mission, which launched on Monday, is headed to Phobos, the larger of the two moons of Mars. It could carry back the first samples from the Martian system.

At Sotheby’s, a feast of rare science books includes volumes from Copernicus, Galileo and Newton that together revolutionized human understanding of the cosmos.

The woman who helped put astronauts on the moon was a software engineer when the field was not prestigious or lucrative.

A new simulation suggests little red dots, unusually compact objects seen in photos from space, might be one stage in the evolution of black holes.

Troy E. Meink’s comments were the first public acknowledgment of American weapons in orbit. The Pentagon has been preparing for potential conflict in space with Russia or China.

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether Earth is truly unique.

The Times’s Science section is introducing new columns, projects and more as part of its online relaunch.

New estimates using the planet’s surface wrinkles show that our smallest planet is growing even smaller, at a faster clip than expected.

Mar Carretero-Castrillo, an astrophysicist, returned to her remote village in Spain to be in the path of totality. Hundreds of partygoers came too.

During early calibration tests, the MOTHRA telescope’s array of lenses, which will soon number 1,140, captured stellar debris dissolving into space around the Helix Nebula.

Check the weather forecast, path and time of the eclipse near you.

The Perseids will be most active on Wednesday into Thursday morning, on the moonless night after a total solar eclipse.

We’re answering some questions about the solar eclipse on Aug. 12, and providing a place for you to ask more of them.

Amateur and professional astronomers pointed their telescopes at the impact site. Most did not detect anything.

The second stage of a Falcon 9 rocket, which sent two private landers to the moon last year, will collide with the moon early Wednesday morning.

Flaming chunks of metal crash into homes, farms and parking lots. Who’s to blame? And who pays for the damage?

A spacecraft meant to push NASA’s Swift Observatory to a higher orbit malfunctioned and started tumbling several days ago. Engineers think it can still succeed.

The end of July brings the Alpha Capricornids and the Southern Delta Aquarids, both of which will be most active on Thursday night into Friday morning.