Multiple choice general knowledge

Xray astronomy is

  1. the study of x ray of planets !!!

  2. the study of x rays of pictures of planets

  3. study of x rays emitted by celestial bodies

  4. study of human x rays taken when in space
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

X-ray astronomy is the study of X-rays emitted by celestial bodies such as stars, galaxies, black holes, and neutron stars. Since Earth's atmosphere blocks X-rays, this requires space-based telescopes. Options A, B, and D are incorrect or nonsensical.

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