Astronomy

A new theory shows Earth’s water was more locally sourced than ever thought before.

This map of Mars provides an in-depth look at its expansive geography and topography.

We’re lucky that a relatively recent catastrophe created the gas-giant spectacle.

One question for Julie Castillo-Rogez, a planetary geophysicist at NASA’s Jet Propulsion Laboratory.

What future missions to Saturn's moon Titan will reveal about the universe.

And how the family business first took me there.

There once was a cosmic seed that sprouted the Milky Way galaxy. Astronomers have discovered its last surviving remnants.

The series of fortunate astrophysical events that gave us Ceres.

Cosmologists are using secondary signatures from the cosmic microwave background to map the universe’s hidden matter.

One question for Jillian Scudder, astrophysicist and author of “The Milky Way Smells of Rum & Raspberries.”

The time is now to prepare for the cosmic object that could spell our end.

One question for Miguel Aragon, a computational physicist at the National Autonomous University of Mexico.