“Extinct Galaxies” –Astronomers Discover Hidden Quasars the Culprit

 

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Some of the biggest galaxies in the universe are full of extinguished stars. But nearly 12 billion years ago, soon after the universe first was created, these massive galaxies were hotspots that brewed up stars by the billions. How these types of cosmic realms, called dusty starburst galaxies, became galactic dead zones is an enduring mystery. Astronomers at the University of Iowa, in a new study published in the Astrophysical Journal, offer a clue. They say quasars, powerful energy sources believed to dwell at the heart of galaxies, may be responsible for why some dusty starburst galaxies ceased making stars.

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Last Week’s Top 5 Space & Science Headlines

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Scientists Set Sail to Unlock the Secrets of “Lost Continent” of Zealandia

 

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Scientists attempting to unlock the secrets of the "lost continent" of Zealandia,The vast underwater 'lost continent' of Zealandia extends from New Zealand north to New Caledonia and west towards the east coast of Australia, set sail Friday to investigate the huge underwater landmass east of Australia that has never been properly studied. Zealandia, which is mostly submerged beneath the South Pacific, was once part of the Gondwana super-continent but broke away some 75 million years ago.

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China Space Program Bound for Mars –“Creating First ‘Mars Village’ Simulation Base on Earth”

 

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China is set to build its first simulation Mars base. The "Mars Village", will be built in the northeastern section of Qinghai-Tibet plateau, with its landscape of Qaidam Basin consists of vast, arid desert –an ideal place to replicate Mars-like environment.

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NASA to Test Earth Defense Observatory & Systems During Asteroid Flyby

 

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"This is the perfect target for such an exercise because while we know the orbit of 2012 TC4 well enough to be absolutely certain it will not impact Earth, we haven't established its exact path just yet," said Paul Chodas, manager of NASA's Center for Near-Earth Object Studies (CNEOS) at the Jet Propulsion Laboratory in the US. "It will be incumbent upon the observatories to get a fix on the asteroid as it approaches, and work together to obtain follow-up observations than make more refined asteroid orbit determinations possible."

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