Multiple choice general knowledge science & technology

In the field of astronomy, "Hubble's Law" mathematically expresses:

  1. The speed of light

  2. A star's rotation

  3. The expanding universe

  4. The orbit of the planets
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hubble's Law states that galaxies are moving away from each other at speeds proportional to their distance - this is the key evidence for an expanding universe. The law is expressed as v = H₀ × d, where v is recession velocity and d is distance. Option C is correct. It does not describe the speed of light (A), stellar rotation (B), or planetary orbits (D).

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