<p>Also known as the Seven Sisters, the star cluster M45—seen in a picture submitted May 7 to National Geographic's <a href="http://ngm.nationalgeographic.com/myshot/">My Shot</a>—contains more than 3,000 stars and is one of the brightest clusters known, according to NASA. At about 400 light-years away, M45 is also one of the closest star clusters to Earth.</p><p>(See <a href="http://news.nationalgeographic.com/news/2012/04/120430-dark-matter-milky-way-structure-satellites-space-science/">"Huge 'Structure' of Satellites Found Orbiting Milky Way."</a>)</p>
Seven Sisters
Also known as the Seven Sisters, the star cluster M45—seen in a picture submitted May 7 to National Geographic's My Shot—contains more than 3,000 stars and is one of the brightest clusters known, according to NASA. At about 400 light-years away, M45 is also one of the closest star clusters to Earth.
(See "Huge 'Structure' of Satellites Found Orbiting Milky Way.")
Space Pictures This Week: Supermoon, Solar Flare, More
A supermoon looms, a solar flare erupts, and night-shining clouds glow in this week's best space pictures.
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