Mars has two moons, but they're not quite like Earth's moon. That's raised a lot of questions about where they're from, ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

Perihelion for 3I/ATLAS takes place on Oct. 30, when the interstellar interloper will be 1.35 astronomical units (125 million ...

While most scientists believe it’s a natural comet, one Harvard astronomer has suggested its unusual features could hint at ...

The universe has quasi-moons, mini-moons, and moonlets, but no official definition of what counts as a moon.

A new scientific theory on solar tide effects has dramatically improved the accuracy of calculating how much faster clocks ...

The Earth often gets a few visitors in the solar system, but some stick around for a while. Here's what to know about the ...

The method, developed by researchers at the State University of Campinas in Brazil, uses images of dune surfaces to estimate ...

SpaceXs Starship Completes 11th Unmanned Earth-Orbit Test Flight The spacecraft deployed eight satellite panels, advancing Mars colonization goals and NASAs Artemis lunar program ...

As an astronomer studying the universe beyond Earth, I’m fond of “outside the box” views almost by default. But one of my favorites is whenever a spacecraft takes a snapshot of our home world and the ...