Hubble

Hubble Revisits 40-Year-Old Mystery of Strange Star’s Nova

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SciTechDaily

This artist’s concept shows the nova system HM Sagittae (HM Sge), where a white dwarf star is pulling material from its red giant companion. This forms a hot, blazing disk around the dwarf, which can unpredictably undergo a spontaneous thermonuclear explosion as the hydrogen inflow from the red giant thickens and reaches a tipping point. … Read more

Hubble telescope maps high-speed ‘extrusions’ from nearby feeding supermassive black hole for first time

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Using the Hubble Space Telescope, astronomers have mapped, for the first time ever, the plasma “burps” of a supermassive black hole-powered quasar that resides relatively close to Earth. While supermassive black holes with masses millions or billions of times that of the sun are thought to reside at the heart of all galaxies, not all … Read more