Test your basic knowledge |

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






2. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)






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






4. A graph relating the temperature and brightness of stars






5. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths






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

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7. A system of two stars that revolve around each other under their mutual gravitation






8. A faint star of enormous density






9. A large body in space that orbits a star and does not produce light of its own






10. An extremely bright star of very large diameter and low density






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






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

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13. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths






14. 23.5° - the reason we have seasons

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15. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)






16. The place in the orbit of a planet where the planet is farthest from the sun






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






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






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






20. The spinning of Earth on its axis






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






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






23. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






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






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






26. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






27. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)






28. The spinning of Earth on its axis






29. A graph relating the temperature and brightness of stars






30. The brilliant explosion of a dying supergiant star






31. The elliptical motion of a body as it orbits another body in space






32. The brightness of a star when viewed from Earth






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






34. A very small star with low temperature - reddish in color






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






36. Any natural satellite of a planet






37. The apparent westward motion of the planets with respect to the stars






38. The apparent westward motion of the planets with respect to the stars






39. Stony or metallic object that is the remains of a meteoroid that has reached the earth's surface






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






41. A measure of the amount of light that a star actually emits






42. A star that ejects some of its material in the form of a cloud and become more luminous in the process






43. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars






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






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






46. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases






47. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun






48. The study of the spectra of stars by analyzing the spectral properties of the light they give off






49. Chunk of rock or dust in space






50. Any natural satellite of a planet