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 elliptical motion of a body as it orbits another body in space






2. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern






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






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






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






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






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






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






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






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






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






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






13. 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






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

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15. The rainbow effect when light is dispersed through lens






16. 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






17. Any natural satellite of a planet






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






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






20. Radiation left over from the beginning of the universe






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






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






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






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






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






26. The rainbow effect when light is dispersed through lens






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






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






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






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






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






32. 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






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






34. The increase in wavelength of light due to an object moving away from the observer






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






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






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






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






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






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

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41. Chunk of rock or dust in space






42. 23.5° - the reason we have seasons

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43. 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






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






45. Radiation left over from the beginning of the universe






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






47. A faint star of enormous density






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






49. Any natural satellite of a planet






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