In this article, we'll find out how galaxies were discovered and what types exist, what they're made of, their internal structures, how they form and evolve, how they're distributed across the universe, and how active galaxies might emit so much energy. Contents What Is a Galaxy...
If a smaller galaxy and a much larger companion merge, it can spell the end of the smaller galaxy. Indeed, the European Space Agency'sGaiasurvey has discovered the bones and corpses of cannibalized galaxies littered throughout theMilky Way. One such example is known as theGaia sausage. This...
How was dark matter discovered? How do lenses refract light? How does an atom emit a photon? How is a photon emitted? Why doesn't electromagnetism affect light? How are electromagnetic waves generated? What is the origin of synchrotron radiation in radio galaxies?
All galaxies on average are moving away from us, and, stranger still, those that were twice as far away were moving twice as fast. => 所有的星系平均正在离我们而去,而陌生人呢,那些距离两倍远的地方的移动速度却快了一倍。 And those that were three times as far away were moving three times ...
How do spiral galaxies get 'feathers'? All it takes is a little gravity It wasn't until 1924, whenEdwin Hubbleidentified several special pulsing stars calledCepheid variablesand realized that they lay outside of the known span of the Milky Way. These celestial objects were completely unique col...
Almost immediately after it was deployed in 1990, astronomers discovered a problem with their beloved $1.5 billion, 43.5-ft (13.3-m) telescope. Their new tractor-trailer-sized eye in the sky couldn't focus properly. They realized that the telescope's primary mirror had been ground to the wro...
“The galaxies are comparable in size to the Magellanic Clouds, dwarf satellite galaxies of theMilky Way,” Geha said. “Previously, such galaxies were thought to be too small to have such massive black holes,” she added. In the nearby Universe, astronomers have found a direct relationship ...
An amateur Italian astronomer discovered five dwarf galaxies, and they are now named after him. Amazingly, these aren’t even astronomerGiuseppe Donatiello’sfirst discoveries. He’s made 11 celestial finds in all, nine of which bear his name,according to an interview he did withSpace.com. ...
How were neutrinos discovered? What does dark matter look like? What does dark matter do to humans? Why are dark matter and dark energy described as dark? Is neutrino dark matter? Why is dark matter non-baryonic? What does dark matter do to galaxies? How was the proton discovered? How ...
For years, scientists believed that circlingthe center of galaxies, including our own Milky Waygalaxy, were not only stars, but lots of stellar blackholes(恒星黑洞). But scientists had yet to findevidence until now.In fact, a study suggests there may be more than10,000 black holes in the...