Astronomy vocab Ch 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| constellation | a pattern of stars in the sky
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| spectrum | white light shining through a prism spreads out to form one
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| observatory | a building that contains one or more telescopes
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| wavelength | the distance between the crest of one wave and the crest of the next wave
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| visible light | the portion of the electromagnetic spectrum that humans can see with their eyes
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| spectrograph | an instrument that breaks the light from an object into colors and photographs the resulting spectrum
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| refracting telescope | a telescope that uses convex lenses to gather and focus light
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| reflecting telescope | a telescope that uses one or more mirrors to gather light
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| electromagnetic radiation | energy that travels through space in the form of waves
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| absolute magnitude | a stars brightness as if it were a standard distance from Earth
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| a huge group of stars such as the milky way | galaxy
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| the unit used to measure distances to stars | light-year
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| Hertzsprung-Russell diagram | a graph of the stars showing temperature on the x-axis and brightness on the y-axis
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| parallax | to measure the distance of nearby stars
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| universe | all of space and everything in it
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| apparent magnitude | the brightness of a star as seen from Earth
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| giant stars | the star Aldebaran is known for this because of its large size
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| nebula | a huge cloud of gas or dust in space
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| black hole | the remains of an extremely massive star pulled into a small volume by the force of gravity
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| white dwarf | the remaining hot core of a star after its outer layers have expanded and drifted out into space
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| protostar | the earliest stage of a star's life
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| quasar | a distant galaxy with a black hole at its center
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| pulsar | emits pulses of radio waves
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| neutron star | a tiny star that remains after a supernova explosion
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| supernova | an explosion that occurs at the end of a giant star's life
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| binary stars | a star system that contains two stars
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| eclipsing binary | a star system in which one star periodically blocks the light from another
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| spiral galaxy | a galaxy whose arms curve outward in a pinwheel pattern
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| elliptical galaxies | galaxies shaped like a flattened ball, containing only stars
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| irregular galaxies | galaxies that do not have a regular shape.
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To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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