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Science Unit D Ch 4
Chapter 4 Vocabulary
Question | Answer |
---|---|
fusion | A process in which nuclei of atoms are joined. |
main sequence | The band on the Hertsprung-Russell (H-R) diagram where ninety percent of stars are found. |
nebula | A huge, cool, dark cloud of gases and dust where stars are formed. |
nova | A star that briefly becomes thousands of times brighter than normal. |
supernova | A supergiant star that explodes. |
galaxy | A large system of stars. |
galactic clusters | A grouping of galaxies. |
refracting telescope | A telescope that uses glass lenses to gather light and magnify objects. |
reflecting telescope | A telescope that uses mirrors to gather light and magnify images. |