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22 Cards in this Set

  • Front
  • Back
Three physical dimensions of space combined with time. Used as a fundamental framework of the theory of relativity
Field Equations
Einstein created, The calculaton of bending light
The notion of a straight line to curved space
Schwarzchild Solution
Mathematical solutions to the equations which correspond to the gravitational field of a massive compact object
A region in spacetime where the known laws of physics break down and the curvature of space becomes infinite
Gravitational Lensing
The bending of light by gravity or by foreground galaxies
Gravitational Redshift
Light is emitted at a lower frequency and longer or redder wavelengths in a gravitational field than in the absense of a gravitational field
Laser Interferometer Gravitational-Wave Observatory. The U.S effort to detect and locate sources of gravitational waves arriving distant cosmos
Meant to describe a cluster in terms of the number of galaxies it contains with a certain brightness internal
Cd Galaxy
A large, diffuse galaxy, often the brightest in a cluster of galaxies
Galactic Cannibalism
Galaxies that eat other galaxies. Mass is greater than mass of normal galaxies
A tendency of some clusters to be clustered together in even grander clusters
Hubble Constant
The constant of proportionality between the distances and the radial recession velocities of galaxies
Cosmic Microwave Background Radiation (CMBR)
The radiation left over from the epoch when the cooling universe changed from an ionized plasma to a natural atomic state
Stands for cosmic background explorer. Groups of scientists who study galaxies.
Active Galactic Nuclei. Found in galaxies that exhibit unusually energetic behavior in their centers
Infrared Astronomy Satellite. A satellite aimed at mapping the entire infrared sky
Carl Jansky
Helped develop radio astronomy in the 1930's with a crude antenna made of wood and pipe
Cas A
Stands for cassiopeia A. The brightest radio object in the sky
Objects of great radiation that are usually emitted in two opposing directions. They can be detected at optical, radio, and x-ray wavelengths
Sychrotron Radiation
Light emitted by charged particles moving at velocities close to that of light in the presence of a magnetic field
Accretion Disk
The immediate environmnent of a black hole