![]() The resulting spectra are cooler and cooler. ![]() Aerobees were used for high atmospheric and cosmic radiation research and could carry payloads to approximately 230 km above Earth.Īfterglow: Outflows of gamma-ray bursts decrease in temperature over a matter of hours. This removes seeing effects and enables the telescope to achieve much better resolution, closer to its theoretical resolving power.Īerobee: A small rocket built by Aerojet General in the 1940s and 1950s. Many astronomers believe supermassive black holes may lie at the center of these galaxies and power their explosive energy output.Īdaptive optics: A technique that compensates for atmospheric turbulence by quickly adjusting the light path in the optics. Absolute zero is 0 degrees Kelvin, -459.67 degrees Fahrenheit, or -273.15 degrees Celsius.Īccretion disk: A relatively flat sheet of gas and dust surrounding a newborn star, a black hole, or any massive object growing in size by attracting material.Īctive galactic nuclei (AGN): A class of galaxies that spew massive amounts of energy from their centers, far more than ordinary galaxies. ![]() At absolute zero, there is no movement of molecules. ![]() A priori: Knowledge that is based on theory rather than observation or experience.Ībsolute zero: Temperature is a measurement of the how fast molecules are moving. ![]()
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