Multiple choice general knowledge sports

How have astronomers learnt 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 the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Astronomers gain knowledge primarily by analyzing electromagnetic radiation (light, radio waves, X-rays, gamma rays, infrared) that reaches Earth or Earth-orbiting telescopes. This includes spectroscopy which reveals composition, temperature, and motion. Space probes have only explored our solar system, not beyond it. Laboratory experiments help but cannot replicate cosmic conditions at scale.

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