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Dark sky image with some objects around Pinwheel Galaxy (M 101). The quarter in the lower right shows the tail of Ursa Major with the stars Mizar, Alcor and Alkaid.. The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, unbarred, and counterclockwise spiral galaxy located 21 million light-years (6.4 megaparsecs) [5] from Earth in the constellation Ursa Major.
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, ... [101] while smaller stars ...
The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
Oklahoma death row inmate, Kevin Ray Underwood, 44, is set to be executed Thursday, 18 years after he killed 10-year-old neighbor Jamie Rose Bolin.
If you are experiencing domestic violence, call the National Domestic Violence Hotline at 1-800-799-7233, or go to thehotline.org. All calls are toll-free and confidential. The hotline is ...
LOS ANGELES (AP) — Oregon and Ohio State are two of the most daunting teams left in the College Football Playoff in no small part because they've both got starting quarterbacks who had already ...
Advances in astronomy have always been driven by technology. After centuries of success in optical astronomy, infrared astronomy was attempted in the 1830s, but only blossomed in the early 1900s. Radio astronomy was born in the 1930s, and matured by the 1950s and 1960s. The problem was that air only allows visible light and radio waves to pass ...
Christopher Stephen Reynolds is a British-American astronomer who is currently Professor of Astronomy at the University of Maryland. He was formerly the Plumian Professor of Astronomy and Experimental Philosophy at the Institute of Astronomy in the University of Cambridge .