Even with infinitely powerful telescopes, we can look back in time only until the time when
A) galaxies first formed
B) hydrogen and helium formed
C) stars first formed
D) gravity split off from a superforce
E) recombination happened

Question

Quizplus · Accepted Answer

Recombination happened about 380,000 years after the Big Bang, when the universe had cooled down enough for neutral atoms to form. Before that, the universe was filled with hot, ionized gas that would have absorbed all light, making it impossible to see anything beyond it. Therefore, even with infinitely powerful telescopes, we can only see up to the point of recombination.

Even with Infinitely Powerful Telescopes, We Can Look Back in Time