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Hubble Helps Find Smallest Known Galaxy Containing a Supermassive Black Hole

Astronomers using data from NASA’s Hubble Space Telescope and ground observation have found an unlikely object in an improbable place — a monster black hole lurking inside one of the tiniest galaxies ever known. The black hole is five times the mass of the one at the center of our Milky Way galaxy. It is inside one of the densest galaxies known to date — the M60-UCD1 dwarf galaxy that crams 140 million stars within a diameter of about 300 light-years, which is only 1/500th of our galaxy’s diameter.

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NASA’s Spitzer Telescope Witnesses Asteroid Smashup

NASA’s Spitzer Space Telescope has spotted an eruption of dust around a young star, possibly the result of a smashup between large asteroids. This type of collision can eventually lead to the formation of planets Scientists had been regularly tracking the star, called NGC 2547-ID8, when it surged with a huge amount of fresh dust between August 2012 and January 2013. “We think two big asteroids crashed into each other, creating a huge cloud of grains the size of very fine sand, which are now smashing themselves into smithereens and slowly leaking away from the star,” said lead author and graduate student Huan Meng of the University of Arizona, Tucson.

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Galactic bubble

The Galactic bubble

Nestled within the shell around this large bubble is an embryonic star that is already a hefty eight times more massive than our Sun.

This image, by ESA’s Herschel space observatory, was originally presented in the first announcement of scientific results  from the mission in May 2010.

This week Herschel scientists will meet again at ESA’s ESTEC establishment in the Netherlands to present, discuss, and take stock of the scientific breakthroughs of the entire mission at The Universe Explored by Herschel symposium.

The Galactic bubble shown in this image was just one of many surprising results of the mission.

It is about 4300 light-years away and has been blown by a star at its centre...

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