a large celestial body that is composed of gas and that emits light
What is star
100
Starlight passing through this produces a display of colors and lines called a spectrum.
What is spectrograph
100
Motion of a star as it appears from Earth
What is apparent motion?
100
The Speed of light
What is 300,00 km/s
100
The graph that illustrates the pattern that occurs when the surface temperature of stars is plotted against their luminosity
What is the H-R diagram
200
an observed change in the frequency of a wave when the source or observer is moving
What is doppler effect?
200
emission, absorption, and continuous
What are three types of spectra?
200
The circular pattern caused by the apparent motion of stars make it seem as though they are moving counter clockwise around a central star called ____________.
What is polaris?
200
8 minutes
What is the time it takes for light to reach Earth from the Sun.
200
The H-R diagram is named for?
Who is Hertzsprung and Russell
300
the distance that light travels in one year
What is light year
300
A device that that separates light into different colors, or wavelengths.
What is a spectrograph
300
These stars never pass below the horizon.
What are circumpolar stars?
300
430 years ago
The way Polaris looked 430 years ago because it is 430 light years away from Earth
300
The band, which extends from cool, dim red stars at the lower right to hot, bright blue stars at the upper left is known as
What is main sequence
400
the brightness of a star as seen from the Earth
What is apparent magnitude
400
The most common element in stars.
What is hydrogen
400
First stars move across the sky
Second, they may revolve around another star
Third, they either move away or toward our solar system
What is the actual motion of stars?
400
blue stars
What is the hottest stars?
400
An example of a main sequence star
What is sun?
500
a large cloud of gas and dust in interstellar space; a region in space where stars are born
What is nebula
500
Stars this color have the coolest surface temperature.
What is red stars?
500
The color of the shift if an object is moving away from Earth.
What is red shifted light?
500
an apparent shift in the position of an object when viewed from different locations
What is parallax
500
In what direction does temperature increase on the H-R diagram?