Subject |
Date Published |
Contributer |
Language |
Total Questions |
File Name |
Anstronomy |
14th February 2009 |
Spaceman45 |
USA |
212 |
wbe7.zip |
Right click and select "Save File as" |
|
Nemo James - Singer Songwriter
Nucleosynthesis |
The process by which nuclear reactions produce the various elements of the periodic table |
Peculiar Velocity |
Any velocity a galaxy has with respect to us that is not a Hubble law velocity due to the expansion of space. Peculiar velocities are due to the gravitaional influences of nearby galaxies, for example, if a galaxy is orbiting in a cluster of galaxies |
Dust |
Tiny grains of stuff, e.g., carbon grains (soot) and silicate grains (sand) that are about 0.1-1.0 micron in size. ______ grains are a major component of the interstellar medium. ______ blocks visible light causing interstellar extinction. |
Radial Velocity |
The velocity that an object possesses that is directly toward or away from the observer (hence on a radial line toward or away from the observer). It can be determined using the doppler shift |
Interstellar Extinction |
As light from a star travels through interstellar space it encounters some amount of dust. This dust scatters some of the light, causing the total intensity of the light to diminish. The more dust, the dimmer the star will appear. |
Relativity, Special |
The specific set of rules relating observations in one inertial frame of reference to the observations of the same phenomenon in another inertial frame of reference. |
Rotation |
Spinning of a body around an axis |
H-R Diagram |
A graph that uses two stellar properties, such as luminosity versus surface temperature, as its axes. Individual stars are positioned on the graph according to their properties |
Mass Luminosity Relation |
A main sequence star's luminosity is roughly proportional to its mass to the 3.5 power: L ~ M3.5. This relationship was derived from the observations of the masses of various types of main sequence stars |