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






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






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






4. The brilliant explosion of a dying supergiant star






5. A faint star of enormous density






6. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune






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






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






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






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






11. 23.5° - the reason we have seasons

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12. A spectrum of light in which there are no gaps - so that each region blends directly into the next






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






14. The small - dense remains of a high-mass star after a supernova






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






16. 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.






17. Explained movement of planets with retrograde motion






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






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






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






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






22. Any natural satellite of a planet






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






24. The rainbow effect when light is dispersed through lens






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






26. 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






27. 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






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






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






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






31. 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






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






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






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






35. A spectrum of light in which there are no gaps - so that each region blends directly into the next






36. Light distance travels in one year (9.5 trillion km)






37. A telescope that uses a curved mirror to collect and focus light






38. A faint star of enormous density






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






40. A group of stars that form a pattern in the sky






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






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






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






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






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






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






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






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






49. A rapidly spinning neutron star that produces radio waves






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

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