Breakthroughs, discoveries, and DIY tips sent every weekday.

NASA's PUNCH mission is photographing the Sun like never before. It can see comets that are invisible to every other ...

Everyone's favorite interstellar comet, 3I/ATLAS, flew past Earth overnight, coming within about 168 million miles (270 million kilometers) of our planet.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

The mystifying 3I/ATLAS interstellar comet is blazing toward Earth and will soon come as close to our planet as it ever will.

However, with 3I/ATLAS passing between Europa Clipper and our host star at the time, the spacecraft was uniquely positioned ...

The interstellar comet 3I/ATLAS made its closest approach to Earth today (Dec. 19, 2025). Here's the latest news you need to ...

A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...

NASA’s PUNCH mission captured detailed images of solar coronal mass ejections, tracking their movement from the Sun’s corona ...

During a long observation, Europa Clipper analyzed the gas plume surrounding interstellar object 3I/ATLAS. The NASA ...

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what ...

Comet 3I/ATLAS is the third known interstellar comet after 2017's 1I/'Oumuamua and 2019's 2I/Borisov. It was discovered on July 1, 2025 and made its closest approach to the sun in October. Now it is ...