2020-09-27@19:55:50 GMT
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a white dwarf:

    In a discovery that could transform our understanding of astronomy, an international team of astronomers reported on Wednesday that they believe an intact exoplanet is tightly orbiting a white dwarf, something previously thought to be impossible. “We report the observation of a giant planet candidate transiting the white dwarf WD 1856+534 every 1.4 days,” the authors write in an article published for the scientific journal Nature. “Transiting” refers to when a planet eclipses the star that it orbits from the perspective of us on Earth, and is a common means by which astronomers search for exoplanets. The paper also explains that the planet candidate is about the same size as Jupiter. Part of the reason that the discovery is so strange is that it...
    Matthew Rozsa September 17, 2020 11:16PM (UTC) In a discovery that could transform our understanding of astronomy, an international team of astronomers reported on Wednesday that they believe an intact exoplanet is tightly orbiting a white dwarf, something previously thought to be impossible. "We report the observation of a giant planet candidate transiting the white dwarf WD 1856+534 every 1.4 days," the authors write in an article published for the scientific journal Nature. "Transiting" refers to when a planet eclipses the star that it orbits from the perspective of us on Earth, and is a common means by which astronomers search for exoplanets. The paper also explains that the planet candidate is about the same size as Jupiter.  : Part of...
    This planet is an absolute chonk. Scientists have discovered a Jupiter-size planet which, for the first time ever recorded, is orbiting a significantly smaller, dim white dwarf star. The planet rapidly orbiting the dwarf — located about 80 light-years away in the northern constellation Draco — has been given the less-catchy name of WD 1856+534. An international team of astronomers used an assortment of ground- and space-based telescopes to make the discovery, which is proof that intact planets can closely orbit white dwarfs. (A white dwarf star is a star which has run out of nuclear fuel. They are known for being about the size of Earth — which means small, in context — but incredibly dense, with only...
    NASA’s Transiting Exoplanet Survey Satellite (TESS) and the space agency’s retired Spitzer Space Telescope have been used to spot the first possible "survivor" planet hugging a white dwarf star. White dwarfs are what stars become after they have exhausted their nuclear fuel. “The Jupiter-size object, called WD 1856 b, is about seven times larger than the white dwarf, named WD 1856+534,” explains NASA in a statement. “It circles this stellar cinder every 34 hours, more than 60 times faster than Mercury orbits our Sun.” NASA CHIEF SAYS VENUS IS 'ONE STOP IN OUR SEARCH FOR LIFE' A paper on the discovery has been published in the journal Nature. In this illustration, WD 1856 b, a potential Jupiter-size planet, orbits its much smaller...
    exoplanet giant that was able to survive the death of its sun and continue to orbit around the white dwarf that became its parent star. “data-reactid =” 12 “> A consortium of astronomers discovered the first giant exoplanet that was capable of of surviving the death of its sun and continuing to orbit the white dwarf that became its parent star. The finding from the Association of Research Universities in Astronomy (Aura) shows that it is possible for planets the size of Jupiter to survive the disappearance of their star and settle into close orbits around the remaining stele, close to the habitable zone. Solar system, when the Sun ages and becomes a white dwarf. “data-reactid...
    (CNN)For the first time, a planet has been discovered orbiting a white dwarf, also known as a dead star. This exoplanet, a planet outside of our solar system, is the size of Jupiter and it's known as WD 1586 b.This giant exoplanet zips around the star remnant, which is about the size of Earth, in a very close orbit every 34 hours. By comparison, Mercury is the closest planet to the sun in our solar system and takes 90 days to complete one orbit around the sun.This dying star is located 80 light-years from Earth in the Draco constellation.The study published Wednesday in the journal Nature. Read MoreA white dwarf is what remains after a sun-like star swells up to...
    A group of citizen scientists has discovered 95 "cool worlds" near the sun, celestial objects much larger than planets but lighter than stars, known as brown dwarfs, according to a new study. The research, slated to be published in the Astrophysical Journal and available to read on the arXiv.org preprint server, notes these "previously unrecognized substellar neighbors to the sun" were found by a citizen scientist project known as Backyard Worlds: Planet 9. “These cool worlds offer the opportunity for new insights into the formation and atmospheres of planets beyond the Solar System,” said the study's lead author, Aaron Meisner from the National Science Foundation’s NOIRLab, in a statement. “This collection of cool brown dwarfs also allows us to accurately...
    So, based on this scenario, Caplan has theorized that as the universe continues to expand, at some point, it will run out of power. The gas in the universe, which is one of the main factors in the formation of new stars, will also be depleted. During this period (called the Great Frost or heat death), the remaining stars will begin to die out and only the remnants of dead stars like black holes, neutron stars, and white dwarfs will remain in the universe. Since white dwarfs are not massive or dense enough to trigger supernova events like other stars, as we have seen, they will suffer a completely different reaction. According to Caplan, as white dwarfs become dimmer and...
    The universe will gradually become a dark and quiet place as stars slowly fizzle out, but in trillions of years a few will let off one last spark of energy, a new study found. Physicist Matt Caplan from Illinois State University calculated that the last 'white dwarf' stars will become black dwarfs and will explode in a supernova. This won't happen for an incredibly long time, according to Caplan, who said the first one won't explode for 10 to the 1100th years - that is trillion one hundred times.  This last bursts of energy as the stars die will be in isolation, as by that point all galaxies in the universe will have dispersed and black holes will have evaporated. ...
    Composite graphic of a white dwarf star inside a NIF hohlraum. A white dwarf with the mass of the sunlight would be about the measurement of planet Earth, making it 1 of densest objects in space right after neutron stars and black holes. Credit: Mark Meamber and Clayton Dahlen/LLNL. Working with the ability of the Nationwide Ignition Facility (NIF), the world’s maximum-strength laser procedure, researchers at Lawrence Livermore Countrywide Laboratory (LLNL) and an intercontinental workforce of collaborators have created an experimental capability for measuring the fundamental attributes of matter, these kinds of as the equation of state (EOS), at the optimum pressures as a result far obtained in a controlled laboratory experiment. The final results are pertinent to the conditions...
    (CNN)Astronomers witnessed a flash of ultraviolet light after a white dwarf star exploded in a supernova, according to a new study. This is only the second time such an event has ever been observed.A white dwarf is the dense remnant of red giant stars once they explode. But white dwarfs can explode, too. Scientists are still trying to figure out why, and this detection may help them find that answer. Unusual supernova sent this star speeding across our galaxyThe unusual supernova was first spotted by astronomers who were using the Zwicky Transient Facility in California in December 2019. Using the extremely wide field camera, they were able to observe the supernova, and the ultraviolet flash that followed, just one...
    Supernovae are some of the most highly effective activities in the Universe. They are really energetic, luminous explosions that can light up the sky. Astrophysicists have a really fantastic plan how they operate, and they’ve structured supernovae into two broad types: they are the conclusion condition for significant stars that explode in close proximity to the finish of their life, or they’re white dwarfs that attract gas from a companion which triggers runaway fusion. Now there may possibly be a third variety. Researchers have found out a white dwarf star that is rushing as a result of the Milky Way following a ‘partial supernova.’ Proof for the star was uncovered in Hubble Space Telescope by a team of scientists...
    Researchers have found evidence of a star blasting itself out of its orbit with another star in a “partial supernova” — now hurtling across the Milky Way. The star, which has about 40 percent of the mass of our sun, is traveling at 559,234 mph. Scientists at the UK’s University of Warwick note that the star, a white dwarf designated SDSS J1240+6710, has an unusual composition. White dwarfs are very dense small stars that have exhausted their nuclear fuel. “The majority of white dwarfs have atmospheres composed almost entirely of hydrogen or helium, with occasional evidence of carbon or oxygen dredged up from the star’s core,” the University of Warwick scientists explained in a statement. SDSS J1240+6710, however, seemed...
    White Dwarfs, the dead remnants of a Sun-like star, are responsible for most of the carbon in the Milky Way - the element essential for life as we know it, a study found.  Astronomers from the US and UK including the University of Warwick, studied star clusters throughout the Milky Way to track down the main sources of carbon.   A White Dwarf star is the dense stellar remnant of a Sun-like star - it is the cool dim phase after it runs out of fuel and expels its matter including carbon atoms. Every carbon atom in the universe was created in a star - some from energetic supernovae explosions and some from White Dwarfs before they begin cooling.  Researchers discovered...
    Researchers have found evidence of a star blasting itself out of its orbit with another star in a “partial supernova” -- now hurtling across the Milky Way. The star, which has about 40 percent of the mass of our sun, is traveling at 559,234 mph. Scientists at the U.K.’s University of Warwick note that the star, a white dwarf designated SDSS J1240+6710, has an unusual composition. White dwarfs are very dense small stars that have exhausted their nuclear fuel. GIGANTIC 'SUPERFLARE' SPOTTED ON NEARBY STAR “The majority of white dwarfs have atmospheres composed almost entirely of hydrogen or helium, with occasional evidence of carbon or oxygen dredged up from the star's core,” the University of Warwick scientists explained in a statement....
    A white dwarf star has been spotted hurtling through the Milky Way at 560,000 miles per hour thanks to a thermonuclear blast from a 'partial supernova', study found. Astronomers from the University of Warwick used observations from the Hubble Space Telescope to find out what sent the white dwarf on its journey. The white dwarf has an 'unusual atmospheric composition' that suggests it was actually a binary star that was able to survive a supernova explosion and was flung out of the system with its pair going in the opposite direction. This opens up the possibility of many more survivors of supernovae travelling undiscovered through the Milky Way, according to the Warwick team. White dwarfs are the remaining cores of red...
    (CNN)A white dwarf star has been sent zooming across our Milky Way galaxy thanks to the blast from a unique kind of supernova that it managed to survive, according to a new study. White dwarf stars are what remain after massive red giant stars die and lose their outer layers. They take billions of years to cool. But this star, dubbed SDSS J1240+6710 by researchers, isn't a typical white dwarf. Usually, white dwarf stars have hydrogen and helium atmospheres, sometimes dotted with carbon or oxygen that was once in the core of the star. However, this star, which was discovered in 2015, included an entirely different and odd concoction. The star's atmosphere includes oxygen, silicon, magnesium, neon, carbon, sodium and...