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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. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere






2. The theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature






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






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






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






6. The rainbow effect when light is dispersed through lens






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






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






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






10. Explained movement of planets with retrograde motion






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






12. Radiation left over from the beginning of the universe






13. The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone






14. A contracting cloud of gas and dust with enough mass to form a star






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






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






17. The most distant point in the orbit of the moon






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






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






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






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






22. The theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature






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






24. Galaxy with no particular shape - contains new & old stars






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






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






27. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements






28. A graph relating the temperature and brightness of stars






29. Galaxy with no particular shape - contains new & old stars






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






31. Any substance that cannot be broken down into simpler substances






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






33. 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






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






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






36. A star that expands and cools once it runs out of hydrogen fuel






37. 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






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






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






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






41. Chunk of rock or dust in space






42. A group of about 30 galaxies that includes the Milky Way






43. Radiation left over from the beginning of the universe






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






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






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






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






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






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






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







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