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Terms in this set (30)
Example of Ursa Major
The Big dipper, or the Big Bear
Example of Ursa Minor
The little dipper, or the little bear
Example of Orion
What star is in Orion?
contains the famous star Betelgeuse
What star is in Ursa Minor?
contains the famous star Polaris that is the North Star
Which star is the brightest star in the northern hemisphere
Which star is the red star or red giant?
Which one is the north star?
What are the two main gas components of Stars?
mostly Hydrogen and Helium
What is the name of the process that stars use as their main energy
What happens to Hydrogen in a fusion reaction inside of a star?
hydrogen is used up as fuel
What color are hot stars?
What color are cool stars?
what does a light year measure?
the distance that light travels in one year
What does the vertical axis on an H-R diagram represent?
On an H-R diagram, what does the horizontal axis represent?
What kinds of stars are found on the main sequence of the H-R
mid life stars
What is a protostar?
forms when the gas and dust from a star forming collapses due to gravity
How is it different from a star?
stars have fusion reactions
How do stars form?
form from a cloud of gas and dust called a nebula
What are red giants?
they are stars that expand and become cooler when they are dying
What is a planetary nebulae?
the outer layers of the star that are blown off create this, it is an inner core surrounded by layers of gas.
What is a white dwarf star?
a small, very dense, hot star which has used up its fuel
What is a supernova?
massive stars bigger than the sun has an enormous explosion this occurs
What are neutron stars?
a small very dense core composed of neutrons
Will our sun become a black hole? Why?
No, it is not massive enough
What are the three kinds (shapes) of galaxies?
elliptical, spiral, irregular
What kind (shape) of galaxy is the milky way?
Approximately how many stars does it contain?
100 billion stars
What is the name of the galaxy closest to the Milky Way?
The Andromeda Galaxy
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