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






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






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






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






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






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






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






8. The rainbow effect when light is dispersed through lens






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






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






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

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






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






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






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






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






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






18. 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.






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






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






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






22. 23.5° - the reason we have seasons

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






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






25. A rapidly spinning neutron star that produces radio waves






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






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

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28. The brilliant explosion of a dying supergiant star






29. The brightness of a star when viewed from Earth






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






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






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






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






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






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






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






37. All of the frequencies or wavelengths of electromagnetic radiation






38. Radiation left over from the beginning of the universe






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






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






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






42. A galaxy shaped like a flattened ball - containing only old stars






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






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






45. The brightness of a star when viewed from Earth






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






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






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






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






50. Any natural satellite of a planet