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






2. 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






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






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






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






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






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






8. The rainbow effect when light is dispersed through lens






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






10. Radiation left over from the beginning of the universe






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






12. The rainbow effect when light is dispersed through lens






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

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14. The spinning of Earth on its axis






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






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






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






18. One of the small asteroid-like bodies that formed the building blocks of the planets






19. 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






20. A faint star of enormous density






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






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






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






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






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






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

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






28. The apparent change in position of an object when seen from different places






29. A model of the solar system in which Earth and the other planets revolve around the sun






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






31. A graph relating the temperature and brightness of stars






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






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






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






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






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






37. 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






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






39. 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.






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






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






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






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






44. The spinning of Earth on its axis






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






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






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






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






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






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