Tools
the Universe
Stars
Lives of Stars
Galaxies
100
A building with more than one telescope that is usually on a mountain away from light pollution is called an...
observatory
100
What is the term for space and everything in it?
the universe
100
What is the difference between absolute and apparent magnitude?
Absolute is the brightness of a star if it were a standard distance from Earth. Apparant magnitude is how bright a star seems from Earth.
100
What factor determines how long a star will live?
Its mass
100
What are the three types of galaxies?
spiral, elliptical and irregular
200
What is the difference between a reflecting and refracting telescope?
a refracting telescope has two lenses while a reflecting telescope has a lens and a mirror.
200
What unit of measure is used to measure distance in astronomy and why?
a light year is used because km are impractical
200
What kind of star is the sun and where would you find in on an HR diagram?
a medium sized star within the main sequence
200
What process has to happen for a star to be born?
nuclear fusion
200
What are the differences between a elliptical galaxy and a spiral galaxy?
amount of dust and gas, age of stars, shape
300
A spectroscope or spectrograph help astronomers determine a star's ______ and ______.
chemical composition and temperature
300
Parallax is used to determine...
a star's distance from Earth.
300
What three things are used to classify a star?
size, brightness and temperature
300
What force pulls matter together to form a star or black hole?
gravity
300
What kind of galaxy is the Milky way and why don't we have any pictures of it?
The Milky Way is a spiral galaxy. We do not have pictures from the outside of it, because our solar system is within the Milky Way.
400
Reflecting telescopes and refracting telescopes are designed to collect and focus _____?
visible light (a type of electromagnetic wave)
400
What is the apparant change in position of an objec when viewed from two different places?
Parallax
400
What color are the hottest stars? What color are the coolest stars?
The hottest stars are blue and cooler stars are red.
400
What is a supernova and what two things can result from it?
A supernova is an explosion of a dying giant star, and results in either a black hole or a neutron star.
400
Evidence that supports the big bang theory is that galaxies are...
expanding away from each other.
500
A spectroscope breaks light into a range of colors that looks like a rainbow and is called the ____ ____.
electromagnetic spectrum
500
What is the name of the theory of the origin of the universe that is most widely believed by scientists?
The big bang theory
500
What two factors does the brightness of a star depend upon
Temperature and size
500
What is a white dwarf called when it stops glowing?
a black dwarf
500
According to the big bang theory, the inner planets in our solar system were formed from?
gas and dust left over from the collapsed nebula that formed our sun.
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