Technology Scientists Believe They Spotted Six 'Dark Galaxies' Thanks to New Technology, Here's What That Means
NASA's Hubble telescope snaps most distant star ever seen
The space telescope brings us a look at Icarus, the farthest star ever seen, thanks to an assist from a cosmic magnifying glass.The star is saddled with the official name "MACS J1149+2223 Lensed Star 1," but astronomers call it Icarus. Icarus came into focus thanks to gravitational lensing, which allows Hubble to use distant galaxies like a cosmic magnifying glass to see what's beyond.
Scientists may have identified up to six "dark galaxies," a finding that could help solve the mystery of how stars and galaxies are created.
Dark galaxies live up to their name, for without nearly any stars they are void of sufficient light. This trait makes them extremely important to our understanding of how gases are ultimately converted into stars, but also makes them immensely difficult to locate. In a newpublished online Wednesday in Astrophysical Journal, researchers from ETH Zurich in Switzerland explain how they used celestial objects called quasars to locate these elusive galaxies.
Guinness World Records Disqualifies Billy Mitchell’s Perfect ‘Pac-Man’ Run, Other Achievements
Billy Mitchell’s perfect “Pac-Man” run and highest score, as well as his “Donkey Kong” score made famous in the documentary “King of Kong: A Fistful of Quarters,” will no longer be recognized by Guinness World Records, the organization told Variety on Friday. The decision to remove all of his world records is driven by news yesterday that Twin Galaxies, which is Guinness’ official source for verification of these achievements, was stripping all of Mitchell’s high scores and banning him from future attempts after it was discovered that he was not playing on a regulation arcade version of “Donkey Kong” to set his records.
Although not stars,. They are powered by black holes and therefore only exist in galaxies with supermassive black holes, Space.com reported. They are created by particles accelerated at speeds approaching the speed of light.
Quasars also emit intense ultraviolet light, which can cause a reaction in hydrogen atoms, creating a fluorescent emission called a Lyman-alpha line,reported. and needed to form stars. This means that any dark galaxies with sufficient hydrogen that are located near a quasar would give off a fluorescent illumination that the researchers could note.
"In short, we used the quasars as a sort of “flashlight” to illuminate parts of the universe that would have been “dark” otherwise in optical radiation," study co-author, Sebastiano Cantalupo, assistant professor of astrophysics at ETH Zurich told Newsweek.
Scientists release most detailed star chart of the Milky Way
The European Space Agency released the most accurate census yet of stars in the Milky Way and neighboring galaxies.The high-precision measurements about the distance, motion, brightness and color of almost 1.7 billion stars were collected by the space agency's Gaia probe between July 2014 and May 2016.
Dark galaxies have previously been referred to as thein the evolution of galaxies. Like modern galaxies, they are full of gas, but this gas has not yet formed into the array of stars that make up modern galaxies. Current theories suggest that dark galaxies either must wait until they contain enough gas to cause a reaction that would make a star, or perhaps the collision of two dark galaxies is the catalyst for star formation, indicated. Either way, further analysis of these mysterious galaxies will hopefully further our understanding of the origins of our own galaxy and our sun.
"We are learning that galaxies may start their life as very inefficient 'builders' of stars and that galaxy formation and evolution in the early universe could have been very different from what we observe today," explained Cantalupo. "This has important implication for all our cosmological models that try to make sense of how the universe has been populated with galaxies, including our own."
Although this method of using quasars to locate dark galaxies has been used before, this time it has proved to be more effective. These advances in space exploration are partly thanks to the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT) of the European Southern Observatory (ESO) in Chile, which allowed the scientists to search for dark galaxies around quasars farther from Earth than had been possible in the past, Phys.org reported. However, more work needs to be done.
"At the moment our constraints on the amount of star present are due to the lack of detectable continuum emission from our MUSE data," explained Cantalupo. "These constraints could be improved by deeper observations, for instance with the Hubble Space Telescope."
Jupiter’s moon Io is covered in volcanos, and astronomers may have just spotted another one .
Jupiter might be the largest, most eye-catching planet in our Solar System, but the planet itself isn't the only interesting thing in its neighborhood. Jupiter’s moon are also a huge point of interest for scientists, and Io is one of the most bizarre. Io is similar in size to Earth’s moon, but it’s a much more active place. Its surface is dotted with incredibly active volcanoes, and astronomers studying Io might have just spotted yet another one.
Scientists Believe They Spotted Six 'Dark Galaxies' Thanks to New Technology; Here's What That Means
Scientists Believe They Spotted Six 'Dark Galaxies' Thanks to New Technology; Here's What That Means: . Thanks for watching, subscribe for more videos: ...
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