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Astronomy Basics

Subject : science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A group of stars that form a pattern in the sky






2. Massive clouds of dust and gases where stars are born






3. A rapidly spinning neutron star that produces radio waves






4. English mathematician and physicist - discovered the law of universal gravitation






5. The two days of the year on which neither hemisphere is tilted toward or away from the sun






6. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece






7. When the moon passes between earth and the sun - blocking the sunlight from reaching earth






8. Every object in the universe was attracted to every other object w/ a force that is directly proportional to the masses and proportional to distance between them






9. The two days of the year on which neither hemisphere is tilted toward or away from the sun






10. The luminous cloud of particles surrounding the frozen nucleus of a comet






11. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun






12. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion






13. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular






14. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice






15. A graph relating the temperature and brightness of stars






16. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth






17. A spherical region of comets that surrounds the solar system






18. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






19. The farther away a galaxy is - the faster it is moving away

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20. Spectrum of electromagnetic radiation emitted by a self-luminous source






21. Point of moon's orbit when it is nearest the earth






22. A particle of electromagnetic radiation having zero mass and carrying a quantum of energy






23. A faint star of enormous density






24. Point in orbit that is closest to the sun - planet moves faster






25. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.

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26. The brightness of a star when viewed from Earth






27. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources






28. The distance between crests of waves - such as those of the electromagnetic spectrum






29. An immense cloud of gas (mainly hydrogen) and dust in interstellar space






30. A star that falls into the main sequence category on the H-are diagram






31. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field






32. The average distance between the Earth and the sun - or approximately 150000000 km






33. Point of moon's orbit when it is nearest the earth






34. The rainbow effect when light is dispersed through lens






35. 23.5° - the reason we have seasons

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36. Varying amounts of the lighted moon as seen from earth






37. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years






38. Italian astronomer - mathematician - and physicist. His telescopes proved the sun is the center of the solar system and that the planets/moon move. He was persecuted for supporting Copernicus' ideas.






39. The decrease in wavelength of light due to an object moving away from the oberver






40. The farther away a galaxy is - the faster it is moving away

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41. A system of galaxies containing from several to thousands of member galaxies






42. A system of galaxies containing from several to thousands of member galaxies






43. An elongated circle - or oval shape - the shape of the planets orbit






44. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation






45. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






46. Point in orbit that is closest to the sun - planet moves faster






47. An enormously bright - distant galaxy with a giant black hole at its center






48. A spherical region of comets that surrounds the solar system






49. The rainbow effect when light is dispersed through lens






50. Change in the apparent frequency of a wave as observer and source move toward or away from each other







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