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Astronomy vocab Ch 3
| Question | Answer |
|---|---|
| constellation | a pattern of stars in the sky |
| spectrum | white light shining through a prism spreads out to form one |
| observatory | a building that contains one or more telescopes |
| wavelength | the distance between the crest of one wave and the crest of the next wave |
| visible light | the portion of the electromagnetic spectrum that humans can see with their eyes |
| spectrograph | an instrument that breaks the light from an object into colors and photographs the resulting spectrum |
| refracting telescope | a telescope that uses convex lenses to gather and focus light |
| reflecting telescope | a telescope that uses one or more mirrors to gather light |
| electromagnetic radiation | energy that travels through space in the form of waves |
| absolute magnitude | a stars brightness as if it were a standard distance from Earth |
| a huge group of stars such as the milky way | galaxy |
| the unit used to measure distances to stars | light-year |
| Hertzsprung-Russell diagram | a graph of the stars showing temperature on the x-axis and brightness on the y-axis |
| parallax | to measure the distance of nearby stars |
| universe | all of space and everything in it |
| apparent magnitude | the brightness of a star as seen from Earth |
| giant stars | the star Aldebaran is known for this because of its large size |
| nebula | a huge cloud of gas or dust in space |
| black hole | the remains of an extremely massive star pulled into a small volume by the force of gravity |
| white dwarf | the remaining hot core of a star after its outer layers have expanded and drifted out into space |
| protostar | the earliest stage of a star's life |
| quasar | a distant galaxy with a black hole at its center |
| pulsar | emits pulses of radio waves |
| neutron star | a tiny star that remains after a supernova explosion |
| supernova | an explosion that occurs at the end of a giant star's life |
| binary stars | a star system that contains two stars |
| eclipsing binary | a star system in which one star periodically blocks the light from another |
| spiral galaxy | a galaxy whose arms curve outward in a pinwheel pattern |
| elliptical galaxies | galaxies shaped like a flattened ball, containing only stars |
| irregular galaxies | galaxies that do not have a regular shape. |
Created by:
Kayla1
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