https://padlet.com/ae110/jtd344d8wuag en-us 2018-04-17 17:22:00 UTC 2025-10-24 17:03:13 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687618 Sagittarius A* is the black hole at the center of the Milky Way galaxy. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687618 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687620 The largest black holes are called "supermassive." These black holes have masses that are more than 1 million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687620 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687621 Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "stuff," in an object. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687621 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687623 NASA is using satellites and telescopes that are traveling in space to learn more about black holes. These spacecraft help scientists answer questions about the universe. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687623 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687625 Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687625 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252687627 A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. ]]> 2018-04-17 17:22:00 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252687627 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/252696226 Another kind of black hole is called "stellar." Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way. ]]> 2018-04-17 17:39:29 UTC https://padlet.com/ae110/jtd344d8wuag/wish/252696226 ae110 https://padlet.com/ae110/jtd344d8wuag/wish/253094595 2018-04-18 16:46:29 UTC https://padlet.com/ae110/jtd344d8wuag/wish/253094595