Black holes are places where gravity is so strong that it sucks everything in, including light. Black holes form when a star or galaxy gets so dense that it collapses under the pull of its own gravity.
Amazing !
If you were sucked into a black hole, your body would be stretched out like a piece of spaghetti.
No light is able to escape from a black hole. Scientists know where they are because they swallow gas from nearby stars and give out X-rays.
White holes and wormholes
Some scientists believe in the existence of white holes, which are the opposite of black holes because they spray out matter and light rather than sucking it in. Some also think that black holes and white holes may join to form tunnels called wormholes - and these may be the secret to time travel. However, white holes have not been proved to exist, and they may violate one of the fundamental laws of physics.
Black holes and electricity
An artists impression of what a black hole might look like, with jets of electricity shooting out from either side.
A supermassive black hole blows bubbles of hot gas into space. Known as the peculiar galaxy because of its unusual shape, NGC4438 is 50 million lightyears from Earth. One bubble rises from a dark band of dust while another emanates from below the band of dust showing up as dim red blobs in the close-up. These exceedingly hot bubbles are caused by the voracious eating habits of black holes.
A Boeing Delta II rocket was launched in 1999 from Cape Canaveral Air Station, carrying the Stardust spacecraft The Swift observatory that it carried was sent to monitor gamma-ray bursts that are thought to occur when a black hole forms.
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