Telescopes
Characteristics of Stars
Lives of Stars
Vocabulary
Misc.
100
What are the two major types of optical telescopes?
Refracting and Reflecting
100
What are imaginary patterns of stars called?
Constellations
100
What determines how long a star lives?
Mass
100
The distance between the crest of one wave and the crest of the next wave is called ___________________.
Wavelength
100
Which star is hotter, a red star or a blue star?
a blue star
200
List the main types of electromagnetic waves, from longest wavelength to shortest.
Radio, infrared, visible light, ultraviolet, X-rays, and gamma rays.
200
Light travels _____________________ kilometers in one year.
9.5 million million
200
In the densest part of a nebula, ___________________ pulls gas and dust together.
gravity
200
Uses a curved mirror to collect and focus light.
reflecting telescope
200
Which star is brighter, a supergiant or the sun?
A supergiant
300
How does a refracting telescope work?
A refracting telescope uses two convex lenses. The objective lens gathers and focuses the light.
300
Characteristics used to classify stars include
color, temperature, size, composition, and brightness
300
Spinning neutron stars are called?
Pulsars
300
A device that breaks light into colors and produces an image of the resulting spectrum.
Spectrograph
300
What does the infrared image show?
Differences in temperature in different areas.
400
Which part of the electromagnetic spectrum can you see?
Visible light
400
H-R (diagram) stands for _____________________, and is used to _____________________ and ___________________________.
H-R stands for Hertzsprung-Russell diagram and is used to classify stars and to understand how stars change over time.
400
An object with gravity so strong that nothing, not even light, can escape is called.
a black hole
400
Remains of high-mass stars that are smaller and denser than white dwarfs.
Neutron stars
400
What characteristics determines each color?
Wavelength
500
Name (not type) the telescope that surveys the sky in the infrared range of the spectrum.
Spitzer Space Telescope
500
The brightness of a star depends upon both its ________________ and _______________________.
size and temperature
500
What stages, regardless of mass, do all stars have in common?
Nebula and protostar (main sequence star)
500
A diagonal area that contains more than 90 percent of all stars, including the sun is know as the _______________________________.
main sequence
500
Who built the first reflecting telescope?
Isaac Newton (1668)
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