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黑洞是存在于宇宙空间中的一种天体。黑洞的引力极其强大，任何物质和辐射都会被吸入其中，连光线也无法逃脱。故而，“黑洞是时空曲率大到连光都无法从其事件视界逃脱的天体”。
Could life exist on a planet orbiting a supermassive black hole？ And if so， what would existence on such a planet be like？ In fact， there is some danger if you live close to a black hole.
Time slows down
According to the ground?breaking sci?fi movie Interstellar， whose scientific advisor was the Nobel Prize?winning physicist Kip Thorne， the space?time surrounding such a planet would be warped in line with Einsteins theory of general relativity. Consequently， time would pass at a slowed?down rate for those on the planet compared to elsewhere in the universe.
Blueshifted light
Any planet around a black hole would have to receive its light from a source other than a star. Instead， the planet would likely be bathed in light emanating from the black holes accretion disks（吸积盘）， or hot halos of gas and matter that collect around and fall into such supermassive objects in space. This blue?shifting of light would also make the planet hotter， helping to provide the sort of temperatures that would allow for the presence of liquid and not frozen water， which is one of the fundamental conditions necessary for life.
High radiation from UV light， X?rays
Could life exist on a planet orbiting a supermassive black hole？ And if so， what would existence on such a planet be like？ In fact， there is some danger if you live close to a black hole.
Time slows down
According to the ground?breaking sci?fi movie Interstellar， whose scientific advisor was the Nobel Prize?winning physicist Kip Thorne， the space?time surrounding such a planet would be warped in line with Einsteins theory of general relativity. Consequently， time would pass at a slowed?down rate for those on the planet compared to elsewhere in the universe.
Blueshifted light
Any planet around a black hole would have to receive its light from a source other than a star. Instead， the planet would likely be bathed in light emanating from the black holes accretion disks（吸积盘）， or hot halos of gas and matter that collect around and fall into such supermassive objects in space. This blue?shifting of light would also make the planet hotter， helping to provide the sort of temperatures that would allow for the presence of liquid and not frozen water， which is one of the fundamental conditions necessary for life.
High radiation from UV light， X?rays