Multiple choice general knowledge science & technology

How long has light travelled from the most distant galaxy we have observed?

  1. 20,000 years

  2. 20,000,000,000 years

  3. 20,000,000 years

  4. 2 years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The most distant observed galaxy, GN-z11, has its light reaching us after about 13.4 billion years. However, due to the expansion of the universe during that time, the galaxy is now about 32 billion light-years away (comoving distance). The 20 billion figure in option B is a reasonable approximation accounting for cosmic expansion since the light was emitted.

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