“Visitor from a Strange Land” –Star Ejected at Mind-Boggling Velocity by Milky Way’s Supermassive Black Hole

Milky Way Center

 

“Seeing this star is really amazing as we know it must have formed in the galactic center, a place very different to our local environment. It is a visitor from a strange land,” said NASA Hubble Fellow Ting Li with the Carnegie Observatories and Princeton University about an ultrafast star, S5-HVS1, traveling at a blistering 6 million km/h, that was ejected by the supermassive black hole at the heart at the Milky Way five million years ago. (more…)

“Pac-Man Black Hole Mergers” –Could Explain Origins of the Cosmic Web of Galaxies

Black Hole accretion disk

 

“This could be a unique way of probing the physics around these supermassive black holes in a way that could not be probed in any other way,” said theoretical gravitational wave astrophysicist, Rochester Institute of Technology’s Assistant Professor Richard O’Shaughnessy, about simulations that could explain the origins of back hole mergers. “It offers unique insight into how the centers of galaxies grow, which is of course essential to understanding how galaxies as a whole grow, which explains most of the structure in the universe.”

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Last Week’s Top 5 Space & Science Headlines –“Masks of Earth to Jupiter’s Possible Lifeform”

 

Jupiter's Great Red Spot

 

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Antimatter Galaxies –“Could Create the Most Destructive Event Since the Big Bang” (Weekend Feature)

 

NGC 4258, also known as M106

 

“Just because we happen to live in a region that is overwhelmingly dominated by matter doesn’t preclude the existence of other regions of space that are instead dominated by antimatter,” observes Dan Hooper, head of the Theoretical Astrophysics Group at the Fermi National Accelerator Laboratory (Fermilab) and Associate Professor of Astronomy and Astrophysics at the University of Chicago.

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“Glowing” –Milky Way Seen Edge On in TESS Panorama of Southern Sky

TESS Southern Sky

 

“Analysis of TESS data focuses on individual stars and planets one at a time, but I wanted to step back and highlight everything at once, really emphasizing the spectacular view TESS gives us of the entire sky,” said Ethan Kruse, a NASA Postdoctoral Program Fellow at NASA’s Goddard Space Flight Center of a new mosaic of the southern sky produced from a year of observations that includes supernova, red giant Betelgeuse, Orion Nebula, satellite galaxies, and the flare from a star ripped apart by a supermassive black hole.

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“Oldest Objects in the Universe” –Hubble Clues Solve Puzzle of Globular Galaxy Clusters

Old Globular Clusters

 

Our Milky Way Galaxy is surrounded by about 150 globular clusters, formed about 11.5 billion years ago, 2.3 billion years after the Big Bang and shortly before the rate of cosmic star formation reached its peak, 10 billion years ago –a period known as “cosmic high noon.” The largest numbers of globular clusters, over ten to twenty thousand, are found around giant galaxies at the centers of galaxy clusters that contain hundreds to thousands of galaxies bound together by gravity, infused by hot gas (up to ten times hotter than the center of the Sun) that far outweighs all the stars in the galaxies comprising the galaxy cluster combined.

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