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Describe the large-scale structure revealed by the redshift surveys.
Which star has the largest proper motion? Why?
What is meant by a cosmological distance?
Can either normal or dark matter stop the universal expansion?
________ images of galactic clusters reveal large amounts of hot, intracluster gas.
Uranus and Neptune are often called twin worlds. How do their axial tilts differ?
Why don't we see very many low-mass exoplanets?
Massive stars form cores of ________ before exploding as Type II supernovae.
Interstellar reddening and extinction are due to ________ in the interstellar medium.
When strong solar wind storms are diverted poleward by our magnetic fields, we often
observe ________ in the ionosphere.
The largest nearby cluster of galaxies lies about 17 Mpc distant in ________.
What direct evidence has been obtained for the existence of dark matter in galaxy
clusters?
Describe the temperature change in the transition zone.
________ stars are solid, extremely dense objects.
A star's ________ parallax is found by using the spectral lines to estimate the spectral
class and luminosity of distant stars.
When the universe was several hundred thousand years old, matter and energy
decoupled, allowing the ________ radiation to escape, expand and cool off.
