Quasars. Astronomers first knew they had a mystery on their hands in the s If you'd like more information on Quasars, check out NASA's. This animation seems to be available at only one other place on YouTube. It's of interest from any point of view. Many astronomers believe that quasars are the most distant objects yet detected in the universe. Quasars give off enormous amounts of energy - they can be a.
Quasar nasa - sich
Quasar nasa Video
NASA View All Media 6 Images. It is now generally accepted that quasars are the highly luminous cores, or nuclei, of distant galaxies. Quasar , an astronomical object of very high luminosity found in the centres of some galaxies and powered by gas spiraling at high velocity into an extremely large black hole. Take this Astronomy True or False Quiz at Encyclopedia Britannica to test your knowledge of space and celestial objects. Quasars are among the most distant and luminous objects known. Photographs taken of their spectra showed locations for emission lines at wavelengths that were at odds with all celestial sources then familiar to astronomers. Since the quasar is so compact and so luminous, the radiation pressure inside the quasar must be huge; indeed, the only way a quasar can keep from blowing itself up with its own radiation is if it is very massive, at least a million solar masses if it is not to exceed the Eddington limit —the minimum mass at which the outward radiation pressure is balanced by the inward pull of gravity named after English astronomer Arthur Eddington. A Quasar Despite their brightness, due to their great distance from Earth, no quasars can be seen with an unaided eye. Because of the finite speed of light , when quasars are observed at great distances, they are observed as they were in the distant past. Go to Imagine the Universe! Articles from Britannica encyclopedias for elementary and high school students. Other classes include Seyfert galaxies and blazars.