A black hole time machine could allow an astronaut to find out what the world will be like in the future. An astronaut could take a short trip near a black hole and return to Earth after years, decades, or even centuries had passed there. Someday humans might be able to use black holes to time travel forward. When the spacewalker returned to the spaceship after an hour-long spacewalk, years would have passed for those aboard the spacecraft. Lets see you dropped your friend into a black hole the mass of the sun, and let him go at the same distance the earth currently is from. But if anyone back on the spacecraft could observe the astronaut’s watch from far away, they’d see its hands slow down as the spacewalker got closer to the black hole. Well, I suppose Id better answer the original question. ![]() If an astronaut left his spacecraft to explore a black hole up close, he’d see the hands on his watch ticking at normal speed. The intense gravity near a black hole makes time behave in strange ways. (A* is scientist-code for “A-star.”) The most common type of black holes, stellar black holes, are only up to 20 times more massive than our sun. This is the kind of black hole that’s at the center of our galaxy, the Milky Way it’s called Sagittarius A*. They’re up to one million times more massive than our sun. Supermassive black holes are the largest type of black hole. The Space Telescope Science Institute (STScI), eduweb and NASA teamed together to develop Black Holes: Gravity’s Relentless Pull. Though astronomers can’t see black holes, they know they’re there by the effect they have on objects that get too close. Fall Into a Black Hole (Interactive) We recently posted Vsauce video of what it would be like to travel inside a black hole, but things are always more fun when they’re interactive. That’s why we can’t see black holes in space-they've gobbled up all the light. This includes light, the fastest thing in the universe. Nothing can move fast enough to escape a black hole’s gravity. ![]() The research could help physicists understand the apparently paradoxical fate of matter and energy in a black hole. A new simulation shows what you might see on your way towards the black hole’s crushing central singularity. The giant star is eventually squashed into a supersmall dot you can’t see.Ī black hole’s gravity, or attractive force, is so strong that it pulls in anything that gets too close. Falling into a black hole might not be good for your health, but at least the view would be fine. This causes an explosion called a supernova. ![]() The star implodes, and its center collapses under its own weight. Most black holes, regardless of their size, are born when a giant star runs out of energy. At the center of most galaxies is one of the strangest and deadliest things in the universe: a black hole.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |