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Astronomers Map 40 Million Stars


Astronomers will soon have access to a new map of the sky that accurately measures the brightness and position of over 40 million stars.
This map is a result of the AAVSO Photometric All-Sky Survey, which has completely covered the sky at a level 100 times fainter than any prior stellar catalog. Millions of stars will have their brightness and color measured accurately for the first time in this survey.
“Prior surveys have done a good job measuring the brightness of bright stars. Other organizations have announced plans to measure faint stars. But this goldilocks zone of stars that are neither too bright or too faint has been neglected, until now,” Dr. Arne Henden, Director of the American Association of Variable Star Observers (AAVSO), said.
“This catalog of stars will serve a key link between existing bright catalogs and fainter catalogs planned for the future, such as those created by Pan-STARRS and the LSST observatories,” Dr. Doug Welch, a professor of Physics and Astronomy at McMaster University.

Full Story: http://aas.org/meetings/aas220

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