“Death Zones” –Outer Regions of Spiral Galaxies Home to Massive Black Holes

 

Galaxy outskirts likely hunting grounds for dying massive stars and black holes. Findings from a Rochester Institute of Technology study provide further evidence that the outskirts of spiral galaxies host massive black holes. These overlooked regions are new places to observe gravitational waves created when the massive bodies collide, the authors report. (more…)

“The Big Rip” –When Matter and Spacetime are Gradually Torn Apart Through Expansion of the Universe

 

Catastrophic end-of-our-universe scenarios proposed by physicists at Kazan Federal University include the Big Rip during which matter of the Universe and the spacetime are progressively torn apart through the expansion. devoted one of their previous works to demonstrating how the Big Rip models are linked with the accelerating expansion of the Universe. Dark energy, which is theorized to be the force of expansion, is still a major mystery for science.

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NASA’s Saturn Probe –Peering Through Titan’s Haze With Infrared Eyes

These six infrared images of Saturn’s moon Titan represent some of the clearest, most seamless-looking global views of the icy moon’s surface produced so far. The views were created using 13 years of data acquired by the Visual and Infrared Mapping Spectrometer (VIMS) instrument on board NASA’s Cassini spacecraft. The images are the result of a focused effort to smoothly combine data from the multitude of different observations VIMS made under a wide variety of lighting and viewing conditions over the course of Cassini’s mission.

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Ocean’s Twilight Zone –Ravenous Single-Celled Organisms May be Altering Earth’s Carbon Cycle

Deep in the ocean’s twilight zone, swarms of ravenous single-celled organisms may be altering Earth’s carbon cycle in ways scientists never expected, according to a new study from Florida State University researchers. In the area 100 to 1,000 meters below the ocean’s surface—dubbed the twilight zone because of its largely impenetrable darkness—scientists found that tiny organisms called phaeodarians are consuming sinking, carbon-rich particles before they settle on the seabed, where they would otherwise be stored and sequestered from the atmosphere for millennia.

This discovery, researchers suggest, could indicate the need for a re-evaluation of how carbon circulates throughout the ocean, and a new appraisal of the role these microorganisms might play in Earth’s shifting climate.

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Today’s “Planet Earth Report” –Our Planet’s Deep Hidden Oceans –“Where Did All the Water Come From?”

Water-bearing minerals reveal that Earth’s mantle could hold more water than all its oceans. Researchers now ask: Where did it all come from?

A couple hundred pebble-size diamonds, plucked from Brazilian mud, sit inside a safe at Northwestern University. To some, they might be worthless. “They’re battered,” said Steve Jacobsen, a mineralogist at Northwestern. “They look like they’ve been through a washing machine.” Many are dark or yellow, far from the pristine gems of jewelers’ dreams.

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