1 Oct 2020, 14:45 UTC With the help of ESO’s Very Large Telescope (VLT), astronomers have found six galaxies lying around a supermassive black hole when the Universe was less than a billion years old. This is the first time such a close grouping has been seen so soon after the Big Bang and the finding helps us better understand how supermassive black holes, one of which exists at the centre of our Milky Way, formed and grew to their enormous sizes so quickly. It supports the theory that black holes can grow rapidly within large, web-like structures which contain plenty of gas to fuel them. Next Previous
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17 Sep 2020, 22:22 UTC Astronomers using the National Science Foundation’s Very Long Baseline Array (VLBA) have made the first direct geometric measurement of the distance to a magnetar within our Milky Way Galaxy — a measurement that could help determine if magnetars are the sources of the long-mysterious Fast Radio Bursts (FRBs).Magnetars are a variety of neutron stars — the superdense remains of massive stars that exploded as supernovae — with extremely strong magnetic fields. A typical magnetar magnetic field is a trillion times stronger than the Earth’s magnetic field, making magnetars the most magnetic objects in the Universe. They can emit strong bursts of X-rays and gamma rays, and recently have become a leading candidate for the sources of FRBs.A magnetar called XTE J1810-197, discovered in 2003, was the first of only six such objects found to emit radio pulses. It did so from 2003 to 2008, then ceased for a decade. In December of 2018, it resumed emitting bright radio pulses.A team of astronomers used the VLBA to regularly observe XTE J1810-197 from January to November of 2019, then again during March and April of 2020. By viewing the magnetar from opposite sides of the Earth’s orbit around the Sun, they were ... Next Previous
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10 Sep 2020, 18:00 UTC
Science Release: New Hubble Data Suggests There is an Ingredient Missing from Current Dark Matter TheoriesNext Previous
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Harvard-Smithsonian Center for Astrophysics 20 Oct 2020, 13:05 UTC The monstrous black hole at the center of the Milky Way galaxy—now of Nobel Prize fame—is proving yet again to be stranger than fiction. New research from scientists at the Center for Astrophysics | Harvard & Smithsonian (CfA), and the Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) at Northwestern University has revealed that the supermassive black hole at the center of the Milky Way galaxy is not spinning much, providing more evidence that it is unlikely to have a jet. The paper is published in The Astrophysical Journal Letters.
NASA's Goddard Space Flight Center 19 Oct 2020, 17:00 UTC Asteroids have been orbiting the sun for thousands of millennia in deep space, standing as ancient storytellers, holding clues about the formation of the solar system. NASA’s first mission to collect a sample from an asteroid, the Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (OSIRIS-REx), is now ready to make its first collection attempt of the potentially dangerous asteroid Bennu and bring its secrets home to Earth. But NASA also has several other asteroid missions coming up with varying purposes, as well as a dynamic program to help us identify and learn more about potentially dangerous objects to defend our planet.
NASA's Goddard Space Flight Center 16 Oct 2020, 14:00 UTC NASA’s first mission to return a sample from an ancient asteroid arrived at its target, the asteroid Bennu, on Dec. 3, 2018. This mission, the Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer, or OSIRIS-REx, is a seven-year long voyage set to conclude upon the delivery to Earth of at least 2.1 ounces (60 grams) and possibly up to almost four and a half pounds (two kilograms) of sample. It promises to be the largest amount of extraterrestrial material brought back from space since the Apollo era. The 20-year anniversary of the asteroid’s discovery was in September 2019 — and scientists have been collecting data ever since. Here’s what we already know (and some of what we hope to find out) about this pristine remnant from the early days of our solar system.
NASA's Goddard Space Flight Center 16 Oct 2020, 12:00 UTC This image, taken with the NASA/ESA Hubble Space Telescope, depicts a special class of star-forming nursery known as Free-floating Evaporating Gaseous Globules, or frEGGs for short. This object is formally known as J025157.5+600606.
ESA Top News 15 Oct 2020, 05:15 UTC The closest approach of the flyby took place at 03:58 GMT (05:58 CEST) this morning at a distance of about 10 720 km from the planet’s surface. Launched 20 October 2018, the spacecraft needs nine gravity assist flybys – one at Earth, two at Venus and six at Mercury before entering orbit around the planet in 2025. Flybys ultilise the gravitational pull of the planets to help alter the speed and direction of the spacecraft, and together with the spacecraft’s solar electric propulsion system, help BepiColombo steer into Mercury orbit against the strong gravitational pull of the Sun.
NASA's Goddard Space Flight Center 14 Oct 2020, 13:36 UTC Quasars are the brightest objects in the universe and among the most energetic. They outshine entire galaxies of billions of stars. A supermassive black hole lies at the heart of every quasar, but not every black hole is a quasar. Only the black holes that are feeding most voraciously can power a quasar. Material falling into the supermassive black hole heats up and causes a quasar to shine across the universe like a lighthouse beacon.
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What’s Happening with Betelgeuse? Astronomers Propose a Specialized Telescope to Watch the Star Every Night20 Oct 2020, 10:26 UTC Starting in late 2019, Betelgeuse began drawing a lot of attention after it mysteriously started dimming, only to brighten again a few months later. For a variable star like Betelgeuse, periodic dimming and brightening are normal, but the extent of its fluctuation led to all sorts of theories as to what might be causing it.
Scientific American 19 Oct 2020, 10:45 UTC The diminutive world and others like it could help astronomers probe the mysteries of planet formation
Universe Today 16 Oct 2020, 19:44 UTC There are instances other than pandemics when it is necessary to work remotely. Spacecraft operators are forced to do most of their work remotely while their charges travel throughout the solar system. Sometimes those travels take place a little closer to home. Engineers at DLR, Germany’s space agency, recently got to take the concept of remote working to a whole new level when they operated a rover in a whole different country almost 700 kilometers away while working remotely from their primary office.