Meet Stevenson 218, the largest known star in the universe. This red supergiant is so massive it could engulf our entire solar system out to Saturn. Learn how astronomers measure its size and ...

The Hubble Space Telescope celebrates 36 years of incredible discoveries, stunning imagery, and a lasting impact on astronomy.

Elon Musk said he was going "make science fiction real" and help push the Earth up a step on the Kardashev scale, on Saturday announcing a new $20 billion chip fabrication plant near Austin called ...

The entire universe may have an internal mind—or the whole idea of consciousness could be a sham. Here’s why scientists still ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before they reach us.

A nearby galaxy is behaving strangely—and now scientists know why. The Small Magellanic Cloud’s stars move in chaotic ...

Out of the 6,000 known exoplanets, it's these rocky worlds that are most worthy of attention in the search for life beyond ...

Earth is not only orbiting the Sun it is also traveling through the Milky Way on an enormous galactic journey. In this video ...

NASA will provide live coverage as two American astronauts are due to spend hours Wednesday, March 18, on a spacewalk outside ...

The levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has ...

The Small Magellanic Cloud (SMC) is one of the Milky Way's closest galactic neighbors—a small, gas-rich galaxy visible to the ...

The molten planet, with an atmosphere rich in sulfur-bearing gases, is unlike anything astronomers have ever smelled.