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. A rapidly spinning neutron star that produces radio waves






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






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






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






5. A faint star of enormous density






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






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






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






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






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






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






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






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






14. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice






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






16. Explained movement of planets with retrograde motion






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






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






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






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






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






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






23. The study of the universe






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






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






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






27. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice






28. 23.5° - the reason we have seasons

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






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






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






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






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






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






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






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






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






38. 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






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






40. 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






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






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






43. Chunk of rock or dust in space






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






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






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






47. The brilliant explosion of a dying supergiant star






48. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)






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






50. A large cloud of dust and gas that can break apart into smaller pieces and form stars