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Two-Faced Star Exposed: Unusual White Dwarf Star Is Made Of Hydrogen On One Side And Helium On The Other

Two-Faced Star Exposed: Unusual White Dwarf Star Is Made Of Hydrogen On One Side And Helium On The Other
spaceref.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from spaceref.com Daily Mail and Mail on Sunday newspapers.

California , United-states , Spain , Hawaii , California-institute-of-technology , Maunakea , Chile , San-diego , Cuba , Hawaiian , Caltech-palomar , Gran-telescopio-canarias

Direct Images of ʻJupiterʻs Younger Siblingʻ

Direct Images of ʻJupiterʻs Younger Siblingʻ
spaceref.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from spaceref.com Daily Mail and Mail on Sunday newspapers.

Cuba , Maunakea , Hawaii , United-states , California , Texas , California-institute-of-technology , Hawaiian , Kyle-franson , Space-administration , Wm-keck-foundation , Exoplanet-science-institute

A crystal ball into our solar system's future - Innovations Report

A crystal ball into our solar system's future - Innovations Report
innovations-report.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from innovations-report.com Daily Mail and Mail on Sunday newspapers.

Cuba , Australia , California , United-states , California-institute-of-technology , Maunakea , Hawaii , Hawaiian , Joshua-blackman , Jean-philippe-beaulieu , David-bennett , John-omeara

Shape of Star Explosions

Date Time
Shape of Star Explosions
When massive stars end their lives in fiery explosions called supernovae, their ashes fly outward to form expanding clouds of debris. While these clouds may look roughly spherical, astronomers think that star explosions are in fact lopsided events in which different amounts of material shoot outward in different directions.
Now, astronomers have a new tool to better understand the asymmetrical shapes of supernova explosions, and thus how stars explode in the first place. An instrument called “WIRC+Pol,” located at Caltech’s 200-inch Hale Telescope at Palomar Observatory, has delivered its first science results, which show that a supernova called SN 2018hna exploded in a shape more like an ellipse than a sphere, similar to the well-studied supernova remnant called SN 1987A.

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"Old Faithful" cosmic eruption shows black hole ripping at star

“Old Faithful” cosmic eruption shows black hole ripping at star
You’ve heard of Old Faithful, the Yellowstone National Park geyser that erupts every hour or two, a geological phenomenon on a nearly predictable schedule.
Now, an international group of scientists who study space have discovered an astronomical “Old Faithful” – an eruption of light flashing about once every 114 days on a nearly predictable schedule. The researchers believe it is a tidal disruption event, a phenomenon that happens when a star gets so close to a black hole that the black hole “rips” away pieces of the star, causing the flare.

Cuba , Ohio , United-states , Denmark , Ohio-state-university , Hawaii , American , Anna-payne , Villum-fonden , Patrick-vallely , Kris-stanek , Chris-kochanek

Mānoa: UH graduate student discovers long-sought 'Old Faithful' active galaxy

The centers of galaxies with actively feeding supermassive black holes are already astounding environments. Now, a team of researchers led by a graduate student from the University of Hawaiʻi Institute for Astronomy (IfA) has found an even more interesting oddball. Feeding black holes typically increase and decrease in brightness similar to the Kilauea volcano, becoming more or less active over time in unpredictable ways. However, the newly discovered black hole is more like Old Faithful geyser at Yellowstone National Park, erupting repeatedly at predictable times.
Astronomers classify galaxies with unusually bright and variable centers as active galaxies. The active centers can produce much more energy than the combined contribution of all the stars in the host galaxy. The excess energy can be seen at visible, ultraviolet, and X-ray wavelengths. Astrophysicists think the extra emission comes from near the galaxy’s central supermassive black hole, where a swirling disk of gas and dust accumulates and heats up because of gravitational and frictional forces. The black hole slowly consumes the material, which usually creates low-level, random changes in the disk’s emitted light.

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