Tonight's Sky
Sun
Sun
Moon
Moon
Mercury
Mercury
Venus
Venus
Mars
Mars
Jupiter
Jupiter
Saturn
Saturn

Tonight's Sky — Change location

OR

Searching...

Tonight's Sky — Select location

Tonight's Sky — Enter coordinates

° '
° '

Exploring the cosmic microwave background

Astronomers use a variety of instruments to study the signature of the Big Bang.
Nearly forty years ago, two radio astronomers at Bell Laboratories in New Jersey were testing a telescope when they discovered unexplained static coming from every direction in the sky. After removing two nesting pigeons from the device, the noise was still there. The astronomers, Arno Penzias and Robert Wilson, soon learned they had stumbled on the earliest possible snapshot of the universe, when the cosmos was 300,000 years old....

Already a subscriber? Register now!

Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below.
ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter.

ADVERTISEMENT
ADVERTISEMENT
BoxProductcovernov

Click here to receive a FREE e-Guide exclusively from Astronomy magazine.

Find us on Facebook

Loading...