Home > Astronomy > Expansion of the Universe

What does Hubble's constant measure?

Answer 1

Hubble's constant corresponds with distance. Hubble's constant can be measured by velocity (km/s divided by distance (Mpc). It is part of an equation that measures the velocity of celestial bodies rushing away from earth.

The velocity is measured by: #v=H_0d#

When: v = velocity in kilometers per second ( #kms^-1#)

#H_0# = a value of around #70 kms^-1 Mpc^-1#

d is the megaparsec (Mpc) distance.

For instance, at a distance of 100 million parsecs, a normal galaxy would be traveling at 7,000 kilometers per hour.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Owen Atkinson

The universe's rate of expansion is gauged by Hubble's constant.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.