"Citizen Sky" project to study bright star that will transform after 27 years.

Byline: ANI

Washington, August 25 (ANI): Astronomers have launched a new citizen science project called "Citizen Sky" to help study a bright star that will soon begin a puzzling transformation that only happens every 27 years.

Epsilon Aurigae is a bright star that can be seen with the unaided eye even in bright urban areas of the Northern Hemisphere from fall to spring.

This fall it is predicted to gradually lose half its brightness until early winter. It will remain faint during all of 2010 before slowly regaining its normal brightness by the summer of 2011.

Since its discovery in 1821, the cause of this dip in brightness has remained a mystery to astronomers.

But this time, they have a powerful new resource to help study the upcoming event: thousands of citizen scientists.

"This star is too bright to be observed with the vast majority of professional telescopes, so this is another area where public help is needed," said Dr. Arne Henden, director of the American Association of Variable Star Observers (AAVSO).

Supported by a three-year grant from the National Science Foundation, Citizen Sky will recruit, train, and coordinate public participation in this project.

What makes this project different from previous citizen science projects is its emphasis on participation in the full scientific method.

Participants are not being asked simply to collect data. They will also be trained to analyze data, create and test their own hypotheses, and to write papers for publication in professional astronomy journals.

Participants can work alone on all phases of the project or they can focus on one stage and team up with others.

"Citizen science can be much more than data collection. Participants often have real-world experience and/or advanced degrees in areas that can be applied to astronomy. Our goal is to introduce the public to authentic science and at the same time use this talent to help astronomers," Henden said.

According to Dr. Robert Stencel, the lead astronomer for this project, "This is truly an amazing star system. It contains both a supergiant star and a mysterious companion. If the supergiant was in our solar system, its diameter would extend to Earth, engulfing us."

"The companion only makes its presence known every 27 years and is a type of 'dark matter' in that we indirectly detect its presence but don't know what it is," he said. (ANI)

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