Telescopes
ROYGBIV is on what part of the electromagnetic spectrum?
The visible spectrum.
What is an imaginary pattern of stars.
A constellation.
All stars begin as this.
A nebula.
Two or more stars are know as?
A star system.
The distance from the "crest" (top) of one wave to the crest of the next wave is called...
Wavelength
Name three characteristics used to classify stars.
What is color, temperature, size, composition, and brightness.
What determines how long a star will exist?
Its mass.
Stars will more mass live shorter than stars with less mass.
What is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.
A galaxy.
What is cosmology?
The science of the origin and development of the universe.
What happens when a star runs out of fuel?
It becomes a white dwarf, a neutron star, or a black hole.
Describe the three types of galaxies.
Spiral (pinwheel)
Elliptical (flattened ball)
Irregular (no regular shape).
Why are many large observatories located on mountaintops?
What is because it is clearer on mountaintops than at sea level and light from cities do not interfere.
Compare and contrast absolute and apparent brightness.
Apparent brightness is how bright the star is from Earth.
Absolute brightness is the brightness of a star if it were at a standard distance from Earth.
What will happen to the sun when it runs out of fuel? Explain.
Its outer layers will expand and it will become a red giant. Eventually, the outer layers of the red giant will drift into space and the remainig hot core will be a white dwarf.
What is the name of our galaxy?
The Milky Way.
How does a reflecting telescope work?
A curved mirror is used to collect and focus light.
What is a parallax?
What is the apparent change in postion of an object when viewed from different places.
What is a black hole?
An object with gravity so strong that nothing, not even light, can escape.
Why do astronomers use scientific notation?
What is to describe sizes and distances in the universe since those numbers are often very large or very small.