Question

1. how does hubble time estimate the age of the universe? hubble time measures the radiation levels from the sun and the time they take to reach the surface of the planets. hubble time measures the distances between galaxies and the time they take to shrink. hubble time measures the distances between galaxies and the time they take to expand. hubble time measures the amount of time that planets in other galaxies orbit their sun.

Explanation:

Hubble time is related to the expansion of the universe. It is calculated from the Hubble - law which relates the recession velocity of galaxies to their distance. By measuring the distances between galaxies and the time they take to expand (based on the Hubble constant), an estimate of the age of the universe can be made.

Answer:

Hubble time measures the distances between galaxies and the time they take to expand.