For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

EU researchers are developing powerful new telescopes to help uncover Earth-like planets around distant stars and advance the search for extraterrestrial life.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

We’ve grown up with the idea that the universe will expand forever, meaning the "cosmological constant" is positive. What if ...

Astronomy is, in essence, an exercise in inference. We cannot touch the stars, nor scoop up galaxies in a lab. Instead, we ...

The James Webb Space Telescope's latest image shows eight spectacular examples of gravitational lensing, a phenomenon that ...

Periodically, the European Space Agency (ESA) releases images that provide breathtaking views of the cosmos, courtesy of its ...

Not all stars are created equally. Astronomers believe that the first stars to form after the Big Bang were mostly made of ...

A daring act tomorrow may not feel as much as an uproarious one. It might simply come softly, like that delicate "yes" for ...