Alien Life | Page 4 of 10 | Astronomy.com

Why are we fascinated by stories of UFOs and aliens visiting Earth?

Alien Life, Cosmology

Ask Astro: If the universe is 13.8 billion years old, shouldn’t other life have existed before us?

Alien Life, Solar System

Should Earthlings blast out our location to the cosmos?

Alien Life, Robotic Spaceflight

How the James Webb Space Telescope will search for extraterrestrial life

Alien Life, Solar System

When it comes to mass extinction, meteorite size doesn’t matter

Alien Life, Planets, Solar System

The case for life on Venus — and the private mission that aims to find it

Technosignature from Proxima Centauri — and why astronomers rejected it

Alien Life, Planets, Solar System

Titan-in-a-test-tube: Earthbound chemists search for alien life

Alien life

Alien Life, Planets

Astronomers identify a new class of habitable planet

Alien Life, Human Spaceflight, Robotic Spaceflight

Galileo Project to search for alien artifacts hiding in the solar system

Pentagon UFO report: No confirmed aliens, but the government wants to learn more