Need to create a login? Want to change your email address or password? Forgot your password?

  1. Sign in to Customer Care using your account number or postal address.
  2. Select Email/Password Information.
  3. Enter your new information and click on Save My Changes.

Locked out of your account? Get help here.

Subscribers can find additional help here.

Not a subscriber? Subscribe today!

Get Access to Print and Digital for $23.99.
Subscribe for Full Access
Get Access to Print and Digital for $23.99.

Astronomers recorded, in the Ophiuchus galaxy cluster, the largest known post–Big Bang explosion, which lasted several hundred million years and created a void of fifteen galactic widths in the plasma around the cluster’s central black hole. “People were skeptical because of the size of the outburst,” said one of the scientists. “We don’t know why it’s so big.”

Adjust

More from

More