Valery Ryumin, Who Set Endurance Record in Space, Dies at 82

A Soviet cosmonaut, he spent 362 days in flight on three missions. He returned 18 years…

NASA Plans to Join U.F.O. Research Efforts

The truth is out there, and now America’s space agency will add its resources to the…

Asteroid Samples May ‘Rewrite the Chemistry of the Solar System’

The flecks of rock were brought back to Earth by the Japanese space mission Hayabusa2 in…

Elon Musk Tells Tesla and SpaceX Workers to Return to Office 40 Hours a Week

In emails to workers at SpaceX and Tesla, Mr. Musk said they were required to spend…

Pale Blue, Deep Blue: How Uranus and Neptune Get Their Colors

While the giant, icy worlds are similar in many ways, a thinner, more active haze makes…

Killer Asteroids Are Hiding in Plain Sight. A New Tool Helps Spot Them.

Researchers have built an algorithm that can scan old astronomical images for unnoticed space rocks, helping…

How to Watch Tau Herculids, a Potential New Meteor Shower

A comet’s breakup three decades ago could produce a seldom-seen meteor storm on Monday night. Or…

Manhattanhenge 2022: Dates, Times and Where to Watch

Everything is coming into alignment for some of the city’s best sunsets of the year. …

Boeing’s Starliner Undocks From I.S.S.: How to Watch

A successful return to Earth of the capsule on Wednesday could set up a flight for…

SpaceX Executive Defends Elon Musk Against Misconduct Accusations

Gwynne Shotwell, SpaceX’s president and chief operating officer, addressed sexual harassment allegations against Mr. Musk in…