Blog: NYT > Science > Space & Cosmos

New observations fail to confirm signs of life in the atmosphere of the distant planet K2-18b. They also raise questions about what it will take to detect biology light-years away.

The tempestuous star in Orion’s shoulder has a buddy, and neither of their futures look bright.

The signatories of the “Voyager Declaration” warned the space agency’s leadership about the consequences of major budget cuts that would halt many science missions.

The Apollo-Soyuz Test Project brought Soviet cosmonauts and NASA astronauts together in the first international human spaceflight.

The planet’s rotation fluctuates as it travels around the sun, and measurements suggest we’re losing more than a millisecond during the long days of summer.

3I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the galaxy.

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show.

Mexican environmental activists say detritus raining down from Elon Musk’s rocket company has caused die-offs of marine life.

He chased eclipses for five decades, wrote several books about them and worked with NASA to make data accessible to nonscientist sky gazers.

The president could tighten federal oversight of the tech titan’s businesses, even if heavy reliance by the Pentagon and NASA on them makes terminating Mr. Musk’s contracts less feasible.

Never miss a rocket launch, meteor shower, eclipse or other event that’s out of this world.

Placing an atomic energy source on the lunar surface is “not science fiction,” experts say, but does pose technical challenges.

The Southern Delta Aquarids and Alpha Capricornids are not the best showers of the summer, but they reach their peak on the same night.

In the summer of 1985, NASA, the Reagan White House and seven talented astronauts were wrangled into an orbital battle over soft-drink supremacy.

Physicists working at the CERN particle physics lab said they detected a slight but significant difference in how particles of matter and antimatter decay.

President Trump had pulled the nomination of a close associate of Elon Musk to lead the agency in May. The decision fueled a public breakdown of their alliance.

A glowing object lit up the sky, prompting dozens of calls to the authorities, as scientists scrambled to figure out what it was. It turns out that it was a meteor.

Sponsored by governments but ferried by a private company, astronauts from Hungary, India and Poland are going to the space station for the first time.

Scenes of nebulas in the Milky Way, a cluster of galaxies and thousands of new asteroids are a teaser of how the U.S.-funded observatory on a mountain in Chile will transform astronomy.

A powerful new telescope will usher in a new era of cosmic discovery, but in a political climate vastly different from when it was named for a once overlooked female astronomer.