Jerry: Some scientists believe that there are a class of "primordial" or micro black holes that formed at the same time the Universe formed. Specifically the theory of their creation, lifespan, death, and the effects that they cause on space around them. Matt: I understand that their existence is purely theoretical, but can you explain micro black holes.
Some of the very small primordial black holes are thought to slowly evaporate over long periods of time, whereas more massive black holes can live for many billions of years. These haven't been directly observed, so their reality can't be confirmed. Some scientists believe that there are a class of "primordial" or small black holes that formed at the same time the universe formed. They start as a small black hole and gradually grow to an enormous size, sometimes as large as a hundred million to a billion times the mass of our sun. These are thought to start by "swallowing" other stars at the center of a galaxy. Much more massive black holes are called supermassive black holes. These are called solar-mass black holes - black holes with at least 10x the mass of the sun. Jerry: Most scientists think that black holes are formed when the centers of very massive stars collapse and can no longer support the overlaying material. Great to see you, and welcome to the chat!Īkarsh_Valsan: Hi, good afternoon Jerry. We're working on setting up the chat and will start posting those answered in about 15 minutes. Jerry: Hi everyone! Thanks for the early questions. In 1996 he became a Fellow of the American Physical Society. He was awarded the Bruno Rossi Prize of the High Energy Astrophysics Division of the American Astronomical Society in 1994, that Division's highest award. He received the NASA Outstanding Scientific Achievement Award in 1982, 19. Fishman has over two hundred publications in his research areas. This experiment also serendipitously discovered terrestrial gamma-ray flashes above thunderstorms.ĭr.
He has lectured extensively on these findings at major universities and planetariums in the US and at numerous scientific conferences abroad. The BATSE experiment produced new scientific results on some of the most energetic and violent objects in the Universe, in particular, gamma-ray bursts, the most explosive and most distant objects known. It was launched by the Space Shuttle Atlantis in April 1991 and operated until May 2000. This observatory was the second of NASA's Four Great Observatories in Space (after Hubble). He was the Principal Investigator of the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory. Gerald (Jerry) Fishman is a research astrophysicist with NASA's Marshall Space Flight Center and the Chief Scientist for Gamma-ray Astronomy there. More About Chat Expert Gerald (Jerry) Fishman You can log in and be ready to ask questions at 3:00.
The chat window will open at the bottom of this page starting at 2:30 p.m. Simply visit this page on Thursday, July 15 from 3-4 p.m. On Thursday, July 15, NASA scientist Jerry Fishman from NASA's Marshall Space Flight Center answered your questions about black holes. Somehow, this simple explanation makes them no easier to understand. Black holes are really just the evolutionary end points of massive stars. Black holes have been portrayed as time-traveling tunnels to another dimension, or as cosmic vacuum cleaners sucking up everything in sight. There are many cultural myths concerning black holes - several of the myths are perpetuated by television and movies. › Link: More About Black Holes (Berkeley) Optical/UV: NASA/STScI Radio: NSF/VLA/CfA/ D.Evans et al., STFC/JBO/MERLIN)Īrtist concept of a growing black hole, or quasar, seen at the center of a faraway galaxy. (NASA/Dana Berry/SkyWorks Digital)Ĭomposite image shows the jet from a black hole at the center of a galaxy striking the edge of another galaxy. Artist concept of matter swirling around a black hole.
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