GENERAL KNOWLEDGE

GK

BIG BANG THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How far away is the Andromeda galaxy from the Milky Way?
A
13.8 billion miles
B
2.5 billion light years
C
3 million miles
D
40 billion meters
Explanation: 

Detailed explanation-1: -The Andromeda Galaxy (IPA: /ænˈdrɒmɪdə/), also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy with the diameter of about 46.56 kiloparsecs (152, 000 light-years) approximately 765 kpc (2.5 million light-years) from Earth and the nearest large galaxy to the Milky Way.

Detailed explanation-2: -For the Sun, its light takes about 8.3 minutes to reach us, so we always see the Sun as it was 8.3 minutes ago. The Andromeda galaxy is about 2.5 million light years away, so we see it as it was 2.5 million years ago.

Detailed explanation-3: -In 1764 famed comet observer Charles Messier cataloged the Andromeda Galaxy as his listed object known as M31! Here is an image of the Andromeda Galaxy as viewed from Earth. With the advent of modern telescopes and science, the Andromeda Galaxy is now known to be some 2.5 million light years from us.

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