In a half-second flash of light in May of this year, NASA’s Hubble Space Telescope detected the most powerful explosion since the Big Bang –the brightest infrared light from a short gamma-ray burst ever seen with a bizarre glow that is more luminous than previously thought was possible, unleashing more energy in a blink of an eye than the Sun will produce over its entire 10-billion-year lifetime. This near-infrared emission was 10 times brighter than predicted, defying conventional models.
Hubble’s infrared eye unveiled an enormous flash from Milky Way’s black hole about 3.5 million years ago that lit up a portion of a massive ribbon-like gas structure called the Magellanic Stream of high-velocity clouds of gas torn out of the Magellanic Clouds hundreds of millions of years ago, extending from the Large and Small Magellanic Clouds through the Galactic south pole of the Milky Way. The flash ionized its hydrogen (enough to make 100 million Suns) by stripping atoms of their electrons. The radiation cone was surely witnessed by Earth’s early hominids, already afoot on the African savannas as the ghostly glow spread high overhead in the then unnamed constellation Sagittarius.
In January of 2019, astronomers at the W. M. Keck Observatory on Maunakea, Hawaii and the University of Hawaii Institute for Astronomy’s ATLAS twin telescopes, reported evidence of the exact moment a star collapsed to form a compact object, such as a black hole or neutron star. They dubbed the object “The Cow”, shown in the image above, just visible as one of two bright spots in the lower right quadrant of the spiral galaxy classified as CGCG 137-068. The objects incredibly bright glow –10 to 100 times brighter than a typical supernova–was caused by stellar debris, swirling around its event horizon.
In 2010, astronomers working with the Fermi Gamma-Ray Space Telescope revealed a previously unseen structure centered in the Milky Way that spans 50,000 light-years that was hypothesized to be the remnant of an eruption from Sgr A*, the supermassive black hole at the center of our galaxy. The bubble emissions, much more energetic than the gamma-ray fog seen elsewhere in the Milky Way, spans more than half of the visible sky, a region roughly as large as the galaxy itself, and it may be millions of years old, its origin, until now, an unsolved mystery.
Astronomers have discovered the biggest explosion seen in the universe, a gargantuan event originating from a super-massive black hole in a cluster of galaxies 390 million light-years away, blasted a crater in the hot gas that could hold 15 Milky Ways. The event in the Ophiuchus galaxy cluster was five times bigger than the previous record-holder.
