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100
our sun is found in this galaxy
What is the Milky Way
100
most stars are made up of these two elements
What are hydrogen and helium
100
this astronomer developed the relationship between red shift and stellar distance
Who is Hubble
100
this astronomer wrote an equation for calculating the probability for extraterrestrial life
Who is Drake
100
this astronomer divided the stars into six different ranks of magnitude
Who is Hipparchus
200
a protostar is found here
What is in a stellar nursery
200
the actual brightness of a star
What is absolute magnitude
200
you would use this to calculate the distance to a very distant dim star
What is red shift
200
the study of how the universe began and how it has changed over time
What is cosmology
200
a cloud of gas or dust that can be seen against a background of stars
What is a nebula
300
this astronomer created an early catalog of non-stellar objects and used the letter M to distinguish them
Who is Messier
300
astronomers use these to locate stars and other distant celestial objects
What are constellations
300
these types of stars make it easier to measure the size of the universe
What are Cepheid variables
300
declination and right ascension are used to do this
What is give the precise location of a star
300
this stellar classification is identified using Roman numerals
What is a star's luminosity
400
This astronomers developed a system for naming stars that used Greek letters and Latin forms of the stars' constellation names
Who is Bayer
400
this astronomer proposed the idea that became the Big Bang Theory
Who is Lemaitre
400
this astronomer created a catalog listing over 13,000 nebulas and other non-stellar objects
What is Dreyer
400
the two motions that make up a star's real motion
What are radial and proper motion
400
these are held together by gravity, rotate around a center of mass, and are made of dust, gases, billions of stars, and more
What are galaxies
500
these two variables are used to plot stars on the Hertzsprung-Russell diagram
What are luminosity and temperature
500
the apparent change in the position of an object as one's viewing position changes
What is parallax
500
which is larger: a light year or a parsec?
What is a parsec
500
these two types of stars both exhibit bright flashes of light
What are novas and supernovas
500
According to this, the earth is 13.5 billion years old
What is the Standard Model of Cosmology