The Sciences

A New Tool for Finding Exploding Stars

The All-Sky Automated Survey for Supernovae is proof that small projects can produce a big payoff.

By Liz KruesiJun 10, 2015 3:35 PM
Remnants of the supernova Cassiopeia A. | NASA/JPL-Caltech/STScI/CXC/SAO


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Astronomers have a new tool to hunt the brightest and nearest exploding stars: ASAS-SN.

The two observatories of the All-Sky Automated Survey for Supernovae scan the Northern and Southern hemispheres every night with six 5.5-inch telescopes (eight total by the end of the summer), taking photos of the sky and comparing successive images to find changes, such as supernovas.

Off-the-shelf equipment helps keep the price tag low for ASAS-SN’s hardware. | Mark Elphick/Los Cumbres Observatory

At $100,000 per pair of telescopes, a bargain in professional astronomy, ASAS-SN proves that small projects can do big science: Since coming online in 2013, it has already found more than 100 supernovas, almost half of the total number of similar discoveries.

[This article originally appeared in print as "ASAS-SN Hunts Exploding Stars."]

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