After SpaceX Launch, a Fear of Satellites That Outnumber All Visible Stars

Images of the Starlink constellation in orbit have rattled astronomers around the world. Click…

NASA Hires 3 Companies for Moon Deliveries

The landers would be the first American spacecraft to touch down on the moon since the…

Manhattanhenge 2019: When and Where to Watch

This week could be your chance to take “the best sunset picture of the year” in…

‘Wow, What Is That?’ Navy Pilots Report Unexplained Flying Objects

No one at the Pentagon is saying that the objects are extraterrestrial, but the Navy has…

Murray Gell-Mann, Who Peered at Particles and Saw the Universe, Dies at 89

A Nobel winner, he found hidden patterns in the subatomic matter that forms the universe, evoking…

SpaceX’s Third Launch Attempt of Starlink Internet Satellites Set for Tonight

The payload of 60 satellites could be an important new line of business for the private…

Can Trump Put NASA Astronauts on the Moon by 2024? It’s Unlikely

While the Artemis program faces obstacles, the administration’s plan could speed the status quo for America’s…

News analysis: Can Trump Put NASA Astronauts on the Moon by 2024? It’s Unlikely

While the Artemis program faces obstacles, the administration’s plan could speed the status quo for America’s…

Stanton T. Friedman, Scientist Who Tracked U.F.O.s, Dies at 84

He was a nuclear physicist until reports of Earth visits by space aliens seized his imagination.…

SpaceX Again Delays Starlink Internet Satellite Launch

Elon Musk’s company will wait until next week to test its system that aims to provide…