Astrophysics and Cosmology

motion toward or away from an observer.

A telescope that detects radio waves from space using large dish antennas.

Electromagnetic waves with the longest wavelengths.

a small, relatively cool type of star.

A large, expanded star formed after a Sun-like star exhausts the hydrogen in its core.

The stretching of light to longer wavelengths caused by the expansion of space or the motion of distant objects.

A telescope that uses mirrors to collect and focus light.

A telescope that uses lenses to bend and focus light.

The ability of a telescope to distinguish fine detail or separate two closely spaced objects.

a mission conducted without humans aboard the spacecraft.