ASTRON 32146

subject Type Homework Help
subject Pages 5
subject Words 476
subject Authors Eric Chaisson, Steve McMillan

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page-pf1
Contrast image formation in reflectors and refractors.
The tidal pull of the Sun largely cancels that of the Moon at the ________ phases.
When used in a single instrument to greatly enhance its resolution, the four separate
mirrors of the VLT act as a(n) ________.
Fusion in giant stars takes us all the way to iron before a Type II supernova occurs.
Why did it stop with helium in the far more energetic Big Bang?
page-pf2
Almost all of the complex molecules found in space are based on ________ atoms.
Name the layers of the Earth's atmosphere, going up from the surface.
Stars of the main sequence, like our own, are all converting ________ into helium.
page-pf3
Bright blue stars are typical of young ________ star clusters.
Emission nebulae occur only near stars that emit large amounts of ________
electromagnetic radiation.
While both Ptolemy and Copernicus assumed all orbits were ________, Kepler's first
law corrected this and made planetary motion predictable.
Why is Polaris not always the pole star, and when does it get another chance?
page-pf4
According to our HST deep surveys, ________ galaxies are less common now than in
the early universe.
Why are eclipsing binaries the rarest of the three types discussed?
Prior to decoupling, all matter was ________, with free electrons and nuclei.
page-pf5
Why is the bright yellow disk of the Sun, the photosphere, cooler than the areas both
above and below it?
The product of the wavelength times the frequency of a wave is its ________.
When an electron moves from a lower to a higher energy state, a photon is ________.

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