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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. Explained movement of planets with retrograde motion






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






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






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






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






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

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






8. A rapidly spinning neutron star that produces radio waves






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






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






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






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






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






14. 23.5° - the reason we have seasons

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






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. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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






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






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






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

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






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






27. All of the frequencies or wavelengths of electromagnetic radiation






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






29. 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






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






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






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






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






34. Radiation left over from the beginning of the universe






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






36. 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






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






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






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






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






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






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






44. 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






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






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






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






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






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






50. A faint star of enormous density







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