Multiple choice general knowledge sports

How have astronomers learned most of what they know about the stars, galaxies, and the universe?

  1. By sending robotic space probes out to explore the depths of space beyond our solar system.

  2. By analyzing light and other electromagnetic radiation from space that reaches the vicinity of Earth.

  3. Through controlled laboratory and in situ experiments.

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Since stars and galaxies are incredibly far away, we cannot send probes to them or conduct in-situ experiments. Instead, almost all astronomical knowledge is gathered by analyzing the electromagnetic radiation (including visible light, radio waves, and X-rays) emitted by these distant objects that reaches Earth or space-based telescopes.

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