Sierra Space valued at $8 billion as investors double down on defense, space tech Sierra Space said on Thursday it has raised $550 million in a ‌Series C funding round that values it at $8 billion, as ...

See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2026. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

New observations by a team of US astronomers have cast fresh doubt on whether the lunar surface could host abundant water ice. Publishing their results in Science Advances, a team led by Shuai Li at ...

The dark skies during a new moon provide ideal conditions for spotting skywatching targets that would otherwise be outshone by moonlight. When you purchase through links on our site, we may earn an ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...