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We summarize the week's scientific breakthroughs every Thursday.
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		AstronomyThe votes are in: Exoplanets get new names
Arion, Galileo and Poltergeist are just three winners of a contest to name planets and suns in 20 solar systems.
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		AstronomyExploding star is the brightest supernova ever seen
The brightest known supernova put out more energy than 500 billion suns.
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		AstronomyAs first run of gravitational wave search winds down, rumors abound
Advanced LIGO has completed its first search for gravitational waves. Researchers are crunching the data as rumors swirl of a detection.
By Andrew Grant - 			
			
		AstronomyReaders ponder mysterious origins of oxygen on comets and Earth
Readers pondered the origins of oxygen within a comet and during Earth's history.
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		AstronomyClues left at a galactic hit-and-run
Scientists may have discovered a dwarf galaxy that triggered a “galaxy quake” when it buzzed by the Milky Way a few hundred million years ago.
By Andrew Grant - 			
			
		AstronomyRed giants map how the Milky Way grew
A new catalog of the ages of our galaxy’s stars confirms that the Milky Way grew from the inside out.
By Andrew Grant - 			
			
		Cosmology‘Origins’ offers science-based account of creation
In Origins, a science writer compiles an ambitious yet concise history of the universe and life on Earth.
By Sid Perkins - 			
			
		AstronomyNewfound gas cloud may be graveyard of first stars
A 12-billion-year-old gas cloud, rich in hydrogen and helium but nothing else, may house the remains of the universe’s first stars.
By Andrew Grant - 			
			
		AstronomyTo search for an advanced civilization, take a U-turn to star clusters
Globular star clusters might be safe, stable homes for long-lived advanced civilizations.
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		AstronomyThis black hole is an extreme recycler
A cosmic pump powered by a supermassive black hole is recycling gas through a galaxy.
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		AstronomyBlack hole burps up gobbled gas and dust
Two belches from a supermassive black hole are drifting away from another galaxy.
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		AstronomySupernova captured in quadruple comes back for an encore
A supernova that has already appeared four times is back for an encore.