⏰ when
When was the first galaxy discovered beyond the Milky Way?
SpaceGalaxies
Quick Answer
Edwin Hubble showed in 1924 that the Andromeda “nebula” was outside the Milky Way. This established it as a separate galaxy.
The Full Story
In 1924, Edwin Hubble used observations of Cepheid variable stars in the Andromeda Nebula to show that it lay far beyond the Milky Way. This meant Andromeda was a separate galaxy, not a cloud inside our own. The result transformed astronomy’s view of the universe and expanded the known scale of the cosmos enormously. It was a foundational moment in extragalactic astronomy.
Key Facts
1.Established in 1924
2.Astronomer: Edwin Hubble
3.Object: Andromeda Galaxy
YouTube Angle
Suggested video title for this topic:
"The discovery that the Milky Way is just one galaxy among many."