For decades, scientists have studied small satellite galaxies to better understand how the universe’s smallest galaxies ...

The disc of plasma surrounding the black hole at the heart of the Milky Way is constantly emitting flares both large and small.

Stars orbit the centers of galaxies. But beyond that, things get a little harder to visualize. Do galaxies — and, ...

This stunning photo was taken on January 29, 2025, from 265 miles (425 km) above the Pacific Ocean. Pettit, a seasoned ...

Unlike the typical blue-and-green depiction of Earth, this photo shows the planet in a mossy green hue, framed by a thin ...

The shot of our planet and the great cosmos beyond offers an eerie sense of scale to our quotidian situations on Earth.

SPHEREx is set to launch at Friday from California. Here are five things to know about NASA's latest advanced space telescope ...

A SpaceX Falcon 9, carrying the SPHEREx and PUNCH missions, is scheduled to lift off on Sunday at 10:09 p.m. ET.

Credit: Don Pettit Milky Way photography can yield some stunning shots from here on Earth. But what if you had a vantage point at some 400km elevation? This image captured from the International ...

JWST captured this dazzling display of flaring activity from the supermassive black hole at the center of our Milky Way.

Related: How fast does light travel? How do the sun and galaxy move? The sun has an orbit of its own in the Milky Way. The sun is about 25,000 light-years from the center of the galaxy ...

Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full moon. What backyard observers don't ...