How fast was the expansion of the universe?

This means that for every megaparsec — 3.3 million light years, or 3 billion trillion kilometers — from Earth, the universe is expanding an extra 73.3 ±2.5 kilometers per second.

How fast does the universe expand per second?

Most recently, by comparing the apparent brightness of distant standard candles to the redshift of their host galaxies, the expansion rate of the universe has been measured to be H0 = 73.24 ± 1.74 (km/s)/Mpc.

Is the universe expanding faster or slower?

The most plausible explanation for the discrepancy is that the light from the supernovae, which exploded billions of years ago, traveled a greater distance than theorists had predicted. And this explanation, in turn, led to the conclusion that the expansion of the universe is actually speeding up, not slowing down.

How fast is the edge of the universe expanding?

The universe is expanding at a rate of 74.3km per second per megaparsec. A megaparsec is a measure of distance.

How fast is the universe expanding quizlet?

The relationship Hubble observed, which we call “Hubble’s law”, tells us how much expansion there is in a certain amount of space. Our best measurement of this value is 46,528 mph (20.8km/s) of expansion for every million light years of distance.

Is expansion of the universe accelerating?

Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously increasing with time. The unexpected result was that objects in the universe are moving away from one another at an accelerated rate.

How is the universe expansion accelerating?

The radiation-filled Universe dilutes faster; it’s density drops as the volume expands, while each individual photon also loses energy due to its cosmological redshift. The energy density drops faster for a radiation-filled Universe than a matter-filled one, and therefore so does the expansion rate.