Multiple choice general knowledge science & technology What is the use of Hubble constant(H)? To measure the age of Sun To measure the age of Earth To measure the age of Universe To measure the age of Galaxies Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Hubble Constant (H₀) measures the rate of expansion of the universe. By knowing the expansion rate, scientists can estimate the age of the universe by running the expansion backwards in time. A higher H₀ implies a younger universe.