# Stars and Galaxies

Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay
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## Lives of the Stars

The color of a star is due to:

All objects exist as the result of a balance between some force and:

What force keeps Planets from collapsing?

What force keeps Normal Stars from collapsing?

What force keeps White Dwarfs from collapsing?

What force keeps Neutron Stars from collapsing?

What force keeps each Black Holes from collapsing?

Planets are what approximate size?

Normal Stars are what approximate size?

Giant Stars are what approximate size?

White Dwarfs are what approximate size?

Neutron Stars are what approximate size?

Black Holes are what approximate size?

Parallax is:

To multiply two numbers in scientific notation, _____ their exponents

To divide one number by another in scientific notation, _____ the lower exponent

Anything to the first power is:

Anything to the zero power is:

What determines the identity of each particular chemical element?

What two elements make up 99.9% of the cosmos?

Where did the heavy elements in the Solar System come from?

The spacecraft HIPPARCOS provided us with:

To determine distances in the Solar System, we used observations of which bodies?

To determine distances in the Solar System, we must:

The violent collapse and explosion of a star is termed a:

The heavier (more complex) an element is, the __________

Great spiral mass of stars about 100,000 light years across

Technique astronomers use to find distance to nearby stars

Deneb, 1600 light years away, is too far even for HIPPARCOS to measure its distance accurately. We estimate its distance by:

The most likely cause of the eventual extinction of life on earth:

## Galaxies and the Universe

How Big is our Galaxy?

Where are we in our Galaxy?

We know our location in our Galaxy by observing what?

Our galaxy is in the center of:

How is our Sun moving in the galaxy?

The evidence that galaxies are receding from us is:

The energy released at the Big Bang is now observed as:

To get an object moving at the speed of light would require:

This great astronomical discovery was made by a woman astronomer:

In the evenings in _______ we look toward the center of the galaxy

Where is the Solar System in relation to the center of the Milky Way?

These stars give us a distance scale to the galaxies:

Why aren’t astronomers very worried about the "missing mass" in the universe?

The "missing mass" in the universe is more accurately described as:

### Matching (More than one answer may be correct)

Normal Star White Dwarf Neutron Star Black Hole Red Giant

Created 31 March 2000, Last Update 14 Dec 2009

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