Scientists have since worked hard to pinpoint how fast the Universe is expanding, and how long ago the Big Bang took place. It’s a compelling tale, with lots of twists and turns. But ...

Astronomers see red-shift in virtually all galaxies. It is a result of the space between the Earth and the galaxies expanding. This expansion has the effect of increasing the wavelength of the ...

Figure caption, Lower diagram shows spectrum of light redshifted from a distant galaxy moving away from the Earth The upper diagram shows the absorption spectrum from a stationary galaxy with one ...

With all this talk about an expanding universe, perhaps you're wondering how it is that astronomers know things are moving up there, let alone how fast they're moving. But astronomers routinely ...

Terms of Service and Privacy Policy. The prevailing consensus in astrophysics is that the universe has spent the past 13-or-so billion years expanding outward in all ...

There is, however, one value that astronomers have difficulty in pinning down: how fast our universe is expanding. Or, more precisely, astronomers have used multiple methods of estimating the ...

That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding. He announced his finding in 1929. The ratio of distance to redshift was 170 ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don ...

The Spin of Everything The idea gains strength from an interesting observation: everything in the universe spins. Planets rotate. Stars rotate. Black holes spin at near maximum speed, as shown by ...