More mysterious are the giant bla… Though accurate at the time of publication, it is no longer being updated. Scientists call them holes, but they are anything but empty! Disclaimer: This material is being kept online for historical purposes. In the last few years scientists have discovered that many galaxies have supermassive black holes at their centers. No, it's too small for that! Our Sun is too small a star to end its life as a black hole. Black holes are just about the strangest objects in the universe. They wonder, if the Sun became a black hole, would Earth get pulled inside? Why?

Mergers like these also make black holes quickly, and produce ripples in space-time called gravitational waves. They contain matter so compressed that their gravitational pull will not let even light leave them to reach our eyes and telescopes. It simply does not contain enough matter to exert that kind of gravitational force on itself. Earth would then be a black hole! Imagine all of planet Earth squeezed into the size of a marble. Just remember that a black hole is any amount of matter squeezed into … According the the law of universal gravitation, what would happen to Earth if the Sun were somehow replaced by a black hole of the same mass? Our Sun is actually too small to end up as a black hole. 1 1 , gamma-ray bursts are observed to occur (a) mainly near the Sun; (b) throughout the Milky Way Galaxy; (c) approximately uniformly over the entire sky; (d) near pulsars.Black holes result from stars having initial masses (a) less than the mass of the Sun; (b) between I and 2 times the mass of the Sun; (e) up to 8 times the mass of the Sun; (d) more than 25 times the mass of the Sun.If the Sun were magically to turn into a black hole of the same mass, (a) Earth would start to spiral inward; (b) Earth's orbit would remain unchanged; (c) Earth would fly off into space; (d) Earth would be tom apart.According to the second figure in Discovery 22- 1 , a meter-stick in a spaceship traveling at half the speed of light would appear to have a length of (a) I meter; (b) 0.87 meter; (e) 0.50 meter; (d) 0.15 meter.The best place to search for black holes is in a region of space that (a) is dark and empty; (b) has recently lost some stars; (c) has strong X-ray emission; (d) is cooler than its surroundings.The best evidence for supermassive black holes in the centers of galaxies is (a) the absence of stars there; (b) rapid gas motion and intense energy emission; (c) gravitational red shift of radiation emitted from near the center; (d) unknown visible and X-ray spectral lines. They are regions of space where gravity is so powerful that even light can't escape. The page may contain broken links or outdated information, and parts may not function in current web browsers.This question comes from our friends at the Paulucci Space Theatre in Hibbing, Minnesota. It simply does not contain enough matter to exert that kind of gravitational force on itself. A - Earth would quickly be sucked into the black hole B - Earth would slowly spiral in to the black hole' c - Earth's orbit would not change A star has to be more than about 10 times the mass of our Sun to become a black hole. A neutron star is about the same size as (a) a school bus; (b) a u.s. city; (c) the Moon; (d) Earth.A neutron star's immense gravitational attraction is due primarily to its small radius and (a) rapid rotation rate; (b) strong magnetic field; (c) large mass; (d) high temperature.he most rapidly "blinking" pulsars are those that a) spin fastest; (b) are oldest; (e) are most massive; (d) are hottest.The X-ray emission from a neutron star in a binary system comes mainly from (a) the bot surface of the neutron star itself;(b) heated material in an accretion disk around the neutron star; (e) the neutron star's magnetic field; (d) surface ofthe companion star. Some contain huge amounts of matter, some contain much less.Some black holes form after a very large star uses up all its fuel and blows off its outer parts in a gigantic explosion (called a supernova). Our Sun is actually too small to end up as a black hole. Find out If the Sun were magically to turn into a black hole of the same mass Earth's orbit would remain unchanged According to the figure, a meter stick in a spaceship traveling at half the speed of light would appear to have a length of Then, what is left collapses under the weight of its own gravity to become a super-dense object called a black hole. If the Sun were magically to turn into a black hole of the same mass, Earth's orbit would remain unchanged. Scientists are still trying to understand how common they are and how they may have formed.At the other extreme, tiny black holes may have formed in the first few seconds of the universe.Black holes are fascinating objects and astronomers have a lot more questions about them.

These enormous monsters may contain the mass of 100 million or more Suns! Contrary to popular belief, the Solar System would not be sucked in: a solar-mass black hole would exert no more gravitational pull than our Sun. Because it would contain no more matter than it does now and it would be no closer to the planets than it is now.

But what would happen if the Sun were suddenly replaced with a black hole of the same mass? But, the gravitational pull of a black hole, or anything else for that matter, depends only on mass and distance, not how large or small the object is. (d) more than 25 times the mass of the Sun. But we are confident they exist because of the odd behavior of the matter we can see near them.


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