Show:
cea
c
sea
see
c
100
The diagonal pattern where most stars lie on the HR diagram
What is main sequence
100
Time required for the earth to orbit once around the sun
What is year
100
The theory that the sun is at the center of the universe
What is heliocentric/Copernicus's theory
100
earths rotation
What is one day
100
distance between the zenith and horizon
What is altitude
200
The distance where a star's absolute magnitude is measured
What is 32.6 light years
200
Approximate time for the moon to orbit once around the earth
What is month
200
When only gravity is acting on an object it is in what
What is freefall
200
when the earths equator passes the center of the sun
What is vernal equinox
200
point above the observer
What is zenith
300
What is the kind of nebula where stars are born
What is stellar nebula
300
Time required for the earth to rotate once on its axis
What is day
300
Makes it so that there can't be any ideal machines
What is friction or moving parts
300
theory that the sun is in the center of the universe
What is copernicus's theory
300
range of frequencies for all radiation
What is electro magnetic spectrum
400
What are the brightest objects in the universe
What is quasars
400
The theory that the earth is at the center of the universe
What is geocentric/Ptolemy's theory
400
The highest rate something can fall at
What is terminal velocity
400
happens when an object away from the viewer this ocurs
What is red shift
400
reigns of the sky that form a pattern
What is constellations
500
This happens when light or other electromagnetic radiation from an object is increased in wavelength
What is redshift
500
What are the two types of telescopes
What is reflecting and refracting
500
Point directly above the observer
What is zenith
500
occurs when an object is moving towards the observer this happens
What is blueshift
500
evidence of an expanding universe
What is red shift on galaxies