Scientists still can’t agree on the universe’s expansion rate

A new study leaves the puzzle of the Hubble constant unresolved


SUPERNOVA SURPRISE  The universe’s expansion rate can be measured using stellar explosions called type 1a supernovas (one remnant of such an explosion shown). A new study deepens the quandary about why some supernova measurements disagree with estimates made using light from early in the universe’s history.

CXC/NASA, Univ. of Texas

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Cosmology

From the Nature Index

Paid Content