Ask the Space Scientist Conducted by Dr. Sten Odenwald (Astronomer) At this NASA website, I can no longer support questions that don't have to do with the Sun, the Earth and their various interactions. But, you may visit the Astronomy Cafe for answers to over 3000 FAQs about the Solar System, Planet-X, Stars, Galaxies, Black Holes, Big Bang Cosmology, Origin of the Universe, General and Special Relativity, Space Travel, Space Physics, Careers in Astronomy, Telescopes and many other topics, too!

Space Science News homeA New Class of Black Holes? Astronomers may have discovered a new type of middle-weight black hole in the centers of some galaxies. FROM A NASA HQ PRESS RELEASE Apr. 13, 1999: The field of black holes, formerly dominated by heavyweights packing the gravitational punch of a billion Suns and lightweights just a few times heavier than our Sun, now has a new contender -- a just-discovered mysterious class of "middleweight" black holes, weighing in at 100 to 10,000 Su ...

Formation of Stellar Mass Black Holes Stellar mass black holes may be produced by the collapse of the cores of massive stars during supernova outbursts. initially, a smallish remnant forms--a remnant of mass on the order of 1.4 M(Sun)--a neutron star a shock wave next propagates through the outer layers of the star iginiting nuclear reactions and pushing on the envelope of the star depending upon the detailed structure of the envelope of the star, the shock will eject the envelope or it w ...

Black Holes INTRODUCTION BLACK HOLES NEUTRON STARS AND PULSARS HOW THEY FORM HOW WE DETECT THEM BIBLIOGRAPHY Q & A PAGES RELATED LINKS PRINTOUT BOOKS Once a giant star dies and a black hole has formed, all its mass is squeezed into a single point. At this point, both space and time stop. It's very hard for us to imagine a place where mass has no volume and time does not pass, but that's what it is like at the center of a black hole. The point at the center of a black hole ...

What's New Site Map NASA Homepage Search: HOMEScienceSpecial ExhibitSatellites and DataTeachers' Corner Ask an AstrophysicistDictionaryResourcesFeedback Black Holes Level 1 topics include: Introduction to Black Holes Journey into a Black Hole! Level 2 topics include: Black Holes: What Are They? If We Can't See Them, How Do We Know They're There? What About All the Wormhole Stuff? Take Me to Level 1 InformationTake Me to Level 2 Information HomeImagi ...

The Northeast Parallel Architectures Center (NPAC) is working with a number of collaborators at seven other institutions on a project to develop numerical codes simulate the 3D spiraling coalescence of two black holes. This is an important problem in relativity and astrophysics, since colliding black holes are among the most promising sources for generating gravitational waves that may be detected by the turn of the century. NPAC's contribution to this collaboration is concerned with the compu ...

Falling Into a Black Hole In which we fall into a black hole on a real free fall orbit. All distortions of images are real, both general relativistic from the gravitational bending of light, and special relativistic from the near light speed orbit. The black hole belongs to a quadruple stellar system, a binary binary. The system is fictional, but plausible. After you are done dying at the central singularity of the black hole, feel free to explore more about the Schwarzschild geometry, abou ...

Einstein was right...again!!! Satellite observations of Black Holes confirm frame-dragging effect 80 years after prediction November 6, 1997: The next time you feel like you're barely dragging along, blame relativity. You'll be stretching the point, but it appears that Einstein was right: space and time get pulled out of shape near a rotating body. Einstein predicted the effect, called ``frame dragging,'' 80 years ago. Like many other aspects of Einstein's famous theories of relativity, it' ...

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Virtual Trips to Black Holes and Neutron Stars by Robert Nemiroff (Michigan Technological University) Ever wonder what it would look like to travel to a black hole? A neutron star? If so, you might find this page interesting. Here you will find descriptions and MPEG movies that take you on such exciting trips. These movies are scientifically accurate computer animations made with strict adherence to Einstein's General Theory of Relativity. The descriptions are written to be understandable ...