Results for “galaxy evolution”

Ultraviolet Astronomy

**Ultraviolet astronomy** is the study of electromagnetic radiation at ultraviolet wavelengths, which has greatly expanded our understanding of the universe, from the formation of stars and galaxies to the composition of planetary atmospheres.

Andromeda Galaxy

The Andromeda Galaxy (M 31) is a massive barred spiral galaxy, the nearest large galactic neighbor to the Milky Way, located about 2.5 million light‑years away in the constellation Andromeda.

M87 Black Hole

The **M87 black hole** is a supermassive black hole located at the center of the galaxy Messier 87 (M87), approximately 55 million light-years away from Earth, and is the first black hole to be directly imaged by the Event Horizon Telescope (EHT) project.

Johnson Photometric System

**Johnson Photometric System** The **Johnson Photometric System** is a standardized system for measuring the brightness of stars in different colors, developed by American astronomer Harold L. Johnso

Color Index Astronomy