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astronomy final
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what is the galaxy in which our solar system is called
Milky way
cosmology
study of structure and evolution of the universe
rotation curve
plot of rotation speed vs. distance
differential rotation
inner parts rotate faster then outer parts
how to calculate the mass of the galaxy
the rotational velocity & the combined gravitational effect of all mass
Sag A
a galactic center black hole
the cepheid variable
measures distance to other galaxies
the redshift and expansion was a measure of
radial velocity
The more distance a galaxy....
the faster it is receding
Hubble Constant
70 km/sec per mpc
hubble law
the relation of the distance of a galaxy to its recessional speed
recessional velocity equals
H x D
diagram that organizes different galaxy types
tuning fork shaped diagram
E0
almost perfectly spherical
E7
quite flattened
SA
tightly wound and lrg central bulge
Sd
loosely wound and have small central bulge
barred spirals are labeled
SBa-SBd
dark mass
missing mass
all known matter interacts with
wavelength of electromagnetic radiation.
MACHO
massive, compact halo objects
WIMPS
Weakly interacting massive particles.
cosmological principle
lack of a preferred location in the universe
age of the universe is
14 billion years
galaxies move relative to space
gravity can accelerate one galaxy to another faster then space expands.
everytime we look at sky,
we are looking back in time
cosmic microwave background
the light from the early universe
after the big bang what element existed
helium
inflation
when the universe expanded from less than the size of a proton to the size of a basketball
what is inertia
tendency of an object to stay in constant state of rest or uniform motion
why is the gravitational force greater at the poles
because the earth's diameter is greater at the equator
Author
Anonymous
ID
21874
Card Set
astronomy final
Description
FUCKEN IRKING SHIT
Updated
2010-06-03T07:51:13Z
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