What is Lockman Hole?
[[Image:Lockman Hole.jpg|thumb|right|300px|[[Chandra X-ray Observatory]] mosaic of the X-ray sources in the Lockman Hole. Color code: Energy (red 0.4–2.0 keV, green 2–8 keV, blue 4–8 keV). Image is about 50 arcmin per side. Credit: X-ray: NASA/CXC/U. Wisconsin/A.Barger et al.; Illustrations: NASA/CXC/M.Weiss.]] The '''Lockman Hole''' is an area of the [[sky]] which is like a clear window into far distant space. From our position in the [[Milky Way galaxy]], most directions are partly blocked or obscured by [[H I region|H I clouds of neutral hydrogen]]. These glow faintly with [[infrared]] light and obscure distant views at extreme [[ultraviolet]] and soft [[x-ray]] wavelengths. The H I clouds interfere with observations at those wavelengths in nearly all other directions. So the Lockman Hole is an attractive area of the sky for observational astronomy surveys. It is near the pointer stars of the [[Big Dipper]] in the [[constellation]] [[Ursa Major]]. is about 15 square degrees in size,<ref>{{cite news | url=http://www.csmonitor.com/Science/2011/0218/Is-the-Big-Dipper-scooping-dark-matter | title=Is the Big Dipper scooping dark matter? | work=CSMonitor.com | date=2011-02-18 | access-date=2011-12-10 }} </ref><ref>{{cite news | url=http://www.daviddarling.info/encyclopedia/L/Lockman_Hole.html | title=Lockman Hole | work=Encyclopedia of Science | access-date=2011-12-10 }} </ref> and is named after its discoverer, astronomer Jay Lockman. == References == {{reflist}} [[Category:Astronomy]] [[Category:Milky Way]]