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

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






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






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






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






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






7. All of the frequencies or wavelengths of electromagnetic radiation






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

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






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






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






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






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






14. 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






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






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






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






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






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






20. 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






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






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






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

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






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






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. A graph relating the temperature and brightness of stars






28. The name of our galaxy - a spiral galaxy that contains about 400 billion stars






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






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






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






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






33. The brilliant explosion of a dying supergiant star






34. A faint star of enormous density






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






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






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






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






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






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






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






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






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






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






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






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






47. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon






48. Chunk of rock or dust in space






49. 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






50. The brightness of a star when viewed from Earth