Andromeda Galaxy Facts
- Name: Andromeda Galaxy
- Type of Galaxy: Spiral Galaxy
- Estimated Size: 220 kilolight-years (diameter)
- Estimated Stars: ± 1 trillion stars
- Distance from Earth: 2.5 million light-years
- Discovered: Around the year 964
- Discovered by: Abd al-Rahman al-Sufi
14 Andromeda Galaxy Facts for Kids
- Andromeda is a barred spiral galaxy in our universe.
- The Andromeda Galaxy is also known as M31, Messier 31 and NGC 224.
- Andromeda was once known as the Andromeda Nebula.
- The Andromeda Galaxy was first observed by Abd al-Rahman al-Sufi in the year 964.
- Astronomers believe the Andromeda Galaxy formed around 10 billion years ago.
- The Andromeda Galaxy is located within the constellation of Andromeda.
- The Andromeda Galaxy has an estimated diameter of 220 kilolight-years.
- The Andromeda Galaxy is around 2.5 million light-years from Earth.
- The Andromeda Galaxy is the closest major galaxy to ours, the Milky Way.
- Astronomers estimate the Andromeda Galaxy has around one trillion stars.
- The Andromeda Galaxy has the largest diameter of all the galaxies in the Local Group.
- The Andromeda Galaxy has 14 known satellite galaxies, these are known as dwarf galaxies.
- You can view the Andromeda Galaxy without the aid of a telescope on moonless nights.
- The Andromeda Galaxy and Milky Way Galaxy will collide with each other in about 4.5 billion years and form a new elliptical or lenticular galaxy.
Andromeda Galaxy Pictures
A photo of the Andromeda galaxy by NASA’s Galaxy Evolution Explorer.
A photo of the Andromeda Galaxy viewed from the Earth’s surface.
Credit: ScienceTV / YouTube
An close-up x-ray photo showing the Andromeda Galaxy center.
Additional Resources with Andromeda Galaxy Facts
- Andromeda Galaxy – Learn more about the Andromeda Galaxy on the NASA website.
- Andromeda Galaxy Facts – Read about some awesome facts about the Andromeda Galaxy on the Space.com website.
- Messier 31 (Andromeda Galaxy) – Discover more amazing things about Messier 31 on the Swinburne University website.