Black Hole Archives - Page 4 of 5 -
Quasars are supermassive black holes located at the center of distant, massive galaxies. They are the brightest objects in the universe, and display a mysterious diversity in their appearance that has puzzled astronomers for over 20 years.
This infographic explains a popular theory of active supermassive black holes, referred to as the unified model — and how new data from NASA’s Wide-field Infrared Survey Explorer, or WISE, is at conflict with the model. Astronomers say the model could still be correct but needs adjusting to account for the unexpected observations by WISE.
Black holes are some of the most amazing cosmological structures in the universe. We are drawn to them. Perhaps this is because they stand as a kind of sublime horror; they are super massive objects that consume entire worlds.
Almost all galaxies are known to have a single supermassive black hole at their heart. However, an international team of scientists have recently discovered a bizarre galaxy, which has three supermassive black holes in it’s center.
There are certain large objects in the universe such as stars and galaxies that produce black holes after intense gravitational collapse. Not even light entering such a region of space can escape due to the extremely strong gravitational field. These are black voids that are present in the space. According to Albert Einstein, massive stars that are more than twice the mass of the sun, shrink continuously by emitting heat.
White holes are the opposite of black holes, objects into which nothing can enter but are constantly spewing out matter. They were thought to be completely hypothetical, more a mathematical oddity than a real thing…but we may have seen one.
Over the past decade, we have come to appreciate that essentially every normal galaxy, including our Milky Way, harbors a supermassive black hole at its center. These monsters play an important role in the evolution of galaxies and the appearance of the observable universe, but their origin is largely unknown.
The European space observatory XMM-Newton has discovered two supermassive black holes in one quiet galaxy 2 billion light years away, according to a paper to be published in the May 10 issue of the Astrophysical Journal.
In the late 18th century, two scientists (John Michell and Pierre Simon Laplace) separately theorized that a star could be so massive that not even light could escape its surface. But nothing more was made of these “dark stars” until the 20th century, when Albert Einstein published his general theory of relativity.
Scientists are about to observe a supermassive black hole‘s table manners. While studying the motions of stars near the supermassive black hole at the center of the Milky Way, astronomers discovered a huge gas cloud, called G2, heading directly toward it. The findings appeared in the January 5 issue of Nature.
We go about our lives unaware that in the depths of space lurk invisible monsters, destroyers, powerful enough to tear apart our sun and leave our Earth a shattered burned-out ruin. We talk about one object out there whose pull is so powerful you can never escape (from it) no matter how fast you go, not even if you travel at the speed of light. We talk about black holes.
Astronomers have observed, in a distant galaxy, a black hole (“woke up” from a period of extended inactivity) swallowed a gigantic celestial body in the neighborhood. Experts say that a similar event could happening soon in our own galaxy.