Avi Loeb said bases this hypothesis on a July 21 image captured by the Hubble Space Telescope and shared by NASA.

Interstellar object 3I/ATLAS shows unexpected frontal glow that Harvard's Avi Loeb says cannot be explained by sunlight reflection or standard cometary outgassing.

A respected Harvard astrophysicist has shared new claims about the mysterious interstellar object in our Solar System, saying there are signs it is not an ordinary comet.

It’s worth noting that stars didn’t even start showing up until about 300 million years after the Big Bang. So, whether ...

The Milky Way is expected to shine every night through August as it gets higher in a darker sky throughout the United States, ...

Could humans be heading to Mars in the 2030s? Here's how Elon Musk and SpaceX plan to launch Starship on a mission to colonize the Red Planet.

SpaceX could soon launch its third Falcon 9 rocket of the month from California, but it may be hard to see this time soaring over Arizona.

Elon Musk founded SpaceX in 2002 in part with the goal of one day establishing a city on Mars - a plan Starship prominently figures into.