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Stars in dwarf spheroidal galaxies behave in a way that suggests the galaxies are utterly dominated by dark matter. Mario Mateo and Matthew Walker measured the velocity of 6,804 stars in seven dwarf satellite galaxies of the Milky Way: Carina, Draco, Fornax, Leo I, Leo II, Sculptor and Sextans. They found that, contrary to what Newton's law of gravity predicts, stars in these galaxies do not move slower the farther they are from their galaxy's core. picked by AutumnLotus 12 months ago tags dwarf galaxies dark matter spheroidal Mario Mateo Matthew Walker |
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Small, ultrafaint "hobbit" galaxies recently found hovering around our Milky Way are comprised almost entirely of dark matter, a new study confirms. Dark matter is a mysterious substance scientists think accounts for most of the mass in the universe but that is invisible to current instruments. picked by AutumnLotus 1 year ago 2 comments edit related share plime.com |
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Astronomers are using the NASA/ESA Hubble Space Telescope to dissect one of the largest structures in the Universe as part of a quest to understand the violent lives of galaxies. Hubble is providing indirect evidence of unseen dark matter tugging on galaxies in the crowded, rough-and-tumble environment of a massive supercluster of hundreds of galaxies. picked by AutumnLotus 9 months ago 0 comments edit related share science |
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Galaxies today are struggling to clump together against the incredible repulsive power of dark energy, hints a new survey of thousands of galaxies. Measuring this anti-clumping effect puts a new arrow in the quiver of cosmologists seeking to uncover the nature of the mysterious force. picked by deepchill 8 months ago 0 comments edit related share science |
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Huge filaments of dark matter have been detected in a survey of thousands of distant galaxies. The discovery supports the idea that dark matter drove the formation of galaxies and larger cosmic structures and resolves a discrepancy in previous studies about how much dark matter the universe contains. picked by AutumnLotus 8 months ago 0 comments edit related share science |
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Astronomers have produced a scientific gold mine of detailed, high-quality images of nearby galaxies that is yielding important new insights into many aspects of galaxies, including their complex structures, how they form stars, the motions of gas in the galaxies, the relationship of "normal" matter to unseen "dark matter," and many others. picked by AutumnLotus 9 months ago 0 comments edit related share science |
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Distant supernovas (bright dots), captured by NASA’s Hubble telescope, open new vistas into the expansion history of the early universe. As early as 9 billion years ago, a mysterious repulsive force known as dark energy is seen exerting its influence.Even weirder than dark matter—the invisible stuff constituting most of the mass of the universe—is dark energy, a myst... read full post picked by rambler 1 year ago 0 comments edit related share plime.com |
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About 70 percent is dark energy, and around 22 percent of the universe is made up of dark matter. Dark matter makes up a substantial part of the universe. Knowing what it is would answer a crucial question about the universe as a whole. picked by braveheart 2 years ago 0 comments edit related share plime.com |
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Two galaxy clusters collided with each other. The image gathered from visible light as well as the way that gravity effected the light provides striking evidence for dark matter and insight into its properties. More in depth info here in pdf form picked by 2manyusernames 1 month ago 0 comments edit related share science |
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A class of "failed" star called a brown dwarf emits beams of radiation that are thousands of times brighter than any released by the Sun. picked by AutumnLotus 1 year ago 0 comments edit related share plime.com |
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The identity of the mysterious dark matter thought to pervade the universe has eluded astrophysicists for decades. Now, for the first time a team hopes to look inside the sun for one of the prime candidates. picked by AutumnLotus 4 months ago 0 comments edit related share science |
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Through some of the very first scientific observations with the brand-new Large Binocular Telescope (LBT) in Arizona, astronomers has found that a recently discovered tiny companion galaxy to our Milky Way, named the Hercules Dwarf Galaxy, has truly exceptional properties: while basically all of its known peers in the realm of these tiny dwarf galaxies are rather round, this galaxy at a distance o... read full post picked by AutumnLotus 1 year ago 2 comments edit related share plime.com |
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Perhaps the first stars in the newborn universe did not shine, but instead were invisible “dark stars” 400 to 200,000 times wider than the sun and powered by the annihilation of mysterious dark matter. The study calculated how the birth of the first stars almost 13 billion years ago might have been influenced by the presence of dark matter – the unseen, yet-unidentified stuff tha... read full post picked by AutumnLotus 10 months ago 2 comments edit related share plime.com |
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When we think of a galaxy, we think of our own Milky Way or perhaps Andromeda...not invisible, starless blobs. picked by Neiako 2 years ago 2 comments edit related share science |
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Astronomers have found an enormous hole in the Universe, nearly a billion light-years across, empty of both normal matter such as stars, galaxies, and gas, and the mysterious, unseen "dark matter." While earlier studies have shown holes, or voids, in the large-scale structure of the Universe, this new discovery dwarfs them all. picked by 2manyusernames 1 year ago 3 comments edit related share plime.com |
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Astronomers have glimpsed the largest cluster of galaxies ever seen in the distant, early universe. The discovery of this far-off group, estimated to contain as much mass as a thousand large galaxies, offers further proof of the existence of the enigmatic force called dark energy. picked by AutumnLotus 1 month ago 1 comments edit related share science |
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It's the experiment dark matter hunters love to hate. But physicists working on the DAMA (DArk MAtter) experiment might have the last laugh later this week. Rumour has it that, later this week, an Italian lab will claim to have found dark matter, at a conference in Venice, Italy. picked by AutumnLotus 6 months ago 3 comments edit related share science |
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great tips to remove dark circles using photoshop picked by natureseeker 2 years ago 1 comments edit related share plime.com |
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"Dark Tourism" was coined to describe trips to places associated with disaster and depravity. And whether you care to admit it or not, you're a dark tourist. picked by teaya21 2 years ago 8 comments edit related share plime.com |
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Astronomers have measured the distribution of mass inside a dark filament in a molecular cloud with an amazing level of detail and to great depth. The measurement is based on a new method that looks at the scattered near-infrared light or 'cloudshine' and was made with ESO's New Technology Telescope. picked by AutumnLotus 7 months ago 0 comments edit related share science |
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Two Canadian astronomers think there is a good reason dark matter, a mysterious substance thought to make up the bulk of matter in the universe, has never been directly detected: It doesn't exist. picked by AutumnLotus 11 months ago 5 comments edit related share plime.com |