The dimming of Betelgeuse seen at the end of 2019 and the start of 2020 explained — the red giant star “sneezed.” Betelgeuse dimmed in the final few months of 2019, perplexing both professional and amateur astronomers. First noted in October 2019, by February 2020, the star lost two-thirds of its brightness as seen from Earth. Many astronomers — both professional and amateur — questioned if the change of light revealed the star was on the verge of exploding as a supernova. Now, the Hubble Space Telescope (HST) has been used to explain the mystery. Easily found in the constellation… This story continues at The Next Web
A red supergiant star known as Betelgeuse has intrigued scientists worldwide as it inexplicably began to dim noticeably in the sky. We mentioned recently that scientists believe they now know what caused the dimming. The theory is that material was ejected from the star’s surface and cooled in space, turning into dust that has blocked a significant portion of the … Continue reading
Hubble probe readings may reveal what caused Betelgeuse to briefly dim The light from the red supergiant Betelgeuse dimmed to a record low earlier this year, leading stargazers to speculate it was about to explode as a supernova. But now it appears the aging sun merely had a stellar sneeze.…
A sudden ejection of hot gases which formed an enormous dust cloud after cooling may explain this phenomenon.
A huge cloud of dust is blotting out the star
Internal convection and a regular cycle combine to make a big blob of dust.
A mystery has been plaguing scientists concerning why exactly Betelgeuse has dimmed. New observations by NASA and the ESA using the Hubble Space Telescope have given a possible answer to that mystery. The observation suggests that Betelgeuse, a supergiant star, unexpectedly dimmed because of an immense amount of hot material ejected into space. The material formed a dust cloud that … Continue reading
And new observations suggest the red supergiant star is dimming again.
By combining the power of four telescopes, an international team of astronomers has captured the most detailed image yet of a distant star—an observation that’s meshing well with pre-existing theories about the physical characteristics of giant stars.The moniker comes from an old-timey naming convention known as a Bayer designation, a system that labels stars with a Greek letter followed by the Latin name of its constellation.The exponent indicates the presence of a binary star system, so yes, this star has a companion named π2 Gruis.As the new image shows, this particular giant is mostly circular, featuring complex areas of shifting material known as granules, or convection cells.Astronomers have visualized the surface of a distant star before, namely Betelgeuse (another star at the end of its life), but this latest visualisation offers more detail.Importantly, it’s the first image of a star where we can actually see active granules on the surface, and it’s the first to confirm theories about the physical characteristics of late-stage, giant stars, according to new research published this week in Nature.
Tahitian myth, South African nicknames, and ancient Chinese and Hindu titles for lunar mansions are among the inspirations for the new names of 86 stars in the Earth's night sky, astronomers said.Modern star catalogs identify billions of stars through designations that are strings of letters and numbers indicating each star's position or order.For example, Canopus, the second-brightest star in the sky, was named after the navigator of the fleet of King Menelaus in the Trojan War of Greek myth, while Betelgeuse, the ninth brightest star in the night sky, comes from the Arabic "yad al-jauzā," meaning "hand of the giant," the giant being Orion, the constellation to which Betelgeuse belongs.These include Aboriginal Australian, Chinese, Coptic, Hindu, Mayan, Polynesian and South African names.(For the full list of new star names, visit the IAU website here.)"The Working Group on Star Names provides an avenue for these ancient cultural star names to be woven into the tapestry of modern-day star catalogs and star atlases, and to point skywatchers to new and unfamiliar stories in the sky from their fellow human beings from other parts of the world, talking to them from across the centuries," said Eric Mamajek, chair and organizer of the working group.
It’s easy to get Netflix tunnel vision when embarking on an epic telly session, but you’d be a fool of Kraken-sized proportions to discount Amazon Prime Video’s growing library of gems.And remember; all of these movies and TV shows are already included in your Prime subscription, so sit back and prepare to engage your face’s smile apparatus with these comedy masterpieces...When Alec Baldwin and Geena Davis’ married couple perish in a tragic accident, they become ghosts in their former home – but try as they might, they can’t scare away the new occupants.Enter Michael Keaton’s Betelgeuse, a spook for hire that promises to rid them of the troublesome humans – at a price.It’s recently been announced that, 30 years on, a sequel is in production, with both Keaton and co-star Winona Ryder to return.For a start, this is really bold – it tells the story of a sixtysomething divorcee announcing to his three grownup kids that he’s always felt different and is now going to live as a woman.
The universe is about 13.7 billion years old, brimming with stars, planets, and other celestial objects that will dazzle humanity for the next several billion years.And this week, space didn't disappoint.First up is two prolific star-forming galaxies merging together in the Arp 299 system 140 million light years from Earth.The galaxies contain numerous high-mass X-ray binary star systems, captured in a composite image with data from NASA's Chandra Observatory, NuStar, and the Hubble Space Telescope.Elsewhere in space, the Atacama Large Millimeter/submillimeter Array shot the highest-resolution photo ever taken of Betelgeuse, a red supergiant star 600 light-years away.Betelgeuse is one of the largest known stars in the universe, with a radius 1400 times bigger than the sun.
Orion is the Beyonce of constellations.So there’s good reason to be excited about this new image of Orion’s second brightest and biggest star, Betelgeuse, taken by the Atacama Large Millimetre Array in Northern Chile.Not only is it one of the crispest images of a stellar surface yet, but it can tell scientists a lot about the massive star’s future.“This is a big star that will go supernova one day,” paper author and astronomer Iain McDonald from the University of Manchester told Gizmodo.“But we don’t know when, we don’t know how, and don’t know how much material it will lose before it does.”Betelgeuse is a red giant star, but giant is sort of an understatement—its radius is 1200 times that of our Sun, equalling more than the distance from the sun to Jupiter.
We all know better than to stare at the surface of a star.Fortunately, the Atacama Large Millimeter/submillimeter Array (ALMA) telescope in Chile can safely do it for us.It recently turned its high-tech eyes to the star Betelgeuse, which can be found about 600 light-years away in the constellation of Orion.The ALMA image of its surface gives an intriguing look at one of the brightest stars in the night sky."This is the first time that ALMA has ever observed the surface of a star and this first attempt has resulted in the highest-resolution image of Betelgeuse available," says the European Southern Observatory, one of the groups that operates ALMA.The ALMA image, released on Monday, is helping scientists study the star's extended atmosphere.