A top a mountain in Chile, where the days are dry and nights are clear, a team of scientists and engineers is preparing for ...

Astronomers have achieved a first in exoplanet hunting by using the Hubble Space Telescope images to investigate a mysterious ...

This predictable change helps astronomers calculate their distance from Earth. Hubble used a Cepheid star's distance to prove Andromeda was a separate galaxy.

For one, scientists observe a "cosmic fossil" called the cosmic microwave background (CMB). The first light that was free to ...

Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than in neighboring regions of the universe, astronomers say.

The James Webb Space Telescope ( JWST) is celebrating three years of transformational science with a striking new image of ...