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30 Cards in this Set
- Front
- Back
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There are red stars, blue stars, yellow stars, and white stars. Which stars are most like the sun?
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Yellow stars
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If you looked through a telescope and saw a ball of stars, what type of object did you see?
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globular cluster
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Where would you find nebulas in a spiral galaxy, in the halo or in the spiral arms?
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Nebulas would be found in the spiral arms.
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Which would be larger, a globular cluster or a galaxy?
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A galaxy would be larger.
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Which color flame is the hottest?
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Blue
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Which color flame is the coolest?
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Red
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What do the colors of star indicate: their mass, their temperature, or their shape?
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Colors of stars indicate their temperatures.
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What is the rainbow of colors that is produced after looking at white light through a prism called?
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Spectrum
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What does a star's apparent magnitude depend on? its size, its distance from Earth, its energy output, or all of the above?
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Apparent magnitude depends on a star's size, its distance from Earth, and its energy output.
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Which spectrum is produced by a glowing wire inside a light bulb? absorption spectrum or continuous spectrum
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continuous spectrum
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Why does a star's spectrum contain dark lines?
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Because the light passes through cooler gasses.
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What kind of spectrum is produced when a hot solid passes through a cooler gas?
emission, absorption, or continuous |
An absorption spectrum is produced when a hot solid passes through a cooler gas.
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What is apparent magnitude?
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how bright a star looks
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What occurs when their is an apparent shift in motion of a star?
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Parallax
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Why is an H-R diagram used to study the nature of stars?
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Because it shows how stars are classified by temperature, by brightness, and how stars change over time
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What kind of star is formed when a yellow star runs out of hydrogen, its center shrinks inward,its outer parts expand outward and it becomes very large and cool?
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A red giant
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What are giant clouds of gas and dust called?
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nebulas
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What are groups of stars that are usually located along the spiral disk of a galaxy called?
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open cluster
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What is a supernova explosion?
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The death of a star
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Of the following which star would most likely be the youngest? a red giant, a white dwarf, a blue star, a red dwarf
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a blue star
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A dense object, with gravity so strong that light cannot escape, formed from the leftovers of a supernova is called a what?
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A black hole
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What are the majority of stars in our galaxy?
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Main sequence stars
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Which of the following magnitudes indicates the brightest star: -5, 0, -0.35, or +9
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-5
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Which is hotter, a red supergiant star or a main-sequence blue star?
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main-sequence blue star
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What is absolute magnitude?
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the actual brightness of a star
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What are the most distant objects in space called?
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Quasars
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Which of the following could be formed from a supernova: a neutron star, a pulsar, a black hole, or all of them
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A neutron star, a pulsar, and a black hole can all form as a result of a supernova.
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In what is a star born?
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a nebula
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What is the instrument called that astronomers use to spread starlight out into its colors?
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spectrograph
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What is a spinning neutron star called?
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pulsar
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