The observable universe contains so much matter and so many planets that, if it extends infinitely, identical copies of ...

A geomagnetic superstorm is an extreme space weather event that occurs when the sun releases massive amounts of energy and charged particles toward Earth. These storms are rare, occurring about once ...

Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size.

"The discovery of this stream highlights how much is still unknown about the life histories of galaxies, how the hidden ...

Pluto's largest moon, Charon, likely formed through a capture event in the early, crowded Kuiper Belt. Three-body encounters ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered that aging stars in their so-called ...

Experiments at high temperatures and pressures reveal chemistry that can generate water on the surface of exoplanets ...

Explore the evolving rare earth hypothesis, highlighting new findings on habitability and the conditions for complex life on ...

On Wednesday, Nov. 19, NASA will unveil more 3I/ATLAS images captured by the space agency's fleet of instruments both on the ...

Cutting-edge simulations show that Enceladus’ plumes are losing 20–40% less mass than earlier estimates suggested. The new ...

When stars like the Sun run out of hydrogen in their cores, fusion slows and the outer layers balloon outward. The star can ...

There are no confirmed exomoons, moons orbiting distant exoplanets in other solar systems. There are a few candidates, but ...