Latest Issue of Science News


News

Honing the Hubble

New value supports finding that dark energy does not vary with time

BALTIMORE — Astronomers are honing measurements of a familiar cosmic parameter to shed new light on dark energy, the mysterious entity that’s accelerating the universe’s rate of expansion.

Known as the Hubble constant, this parameter indicates the current rate at which distant astronomical objects are receding, a number that can be used to estimate the age of the universe.

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

X
This article is available only to subscribing members. Join SSP today or Log in.