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Purdue professor leads team making astronomical discovery

A Purdue professor is leading a team that’s discovered a unique astronomical feature.  Dr. Matt Lister says ionized gas clouds were first predicted in the early 1970s.

He and his colleagues found evidence of one while monitoring a quasar three billion light years away from Earth. The cloud caused the refraction of the quasar’s radio waves when it passed in between.

Lister says using a quasar as a type of backlight is one method that will help to identify and learn about such clouds in the future.

The discovery was published in the journal Astronomy and Astrophysics.