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 group of about 30 galaxies that includes the Milky Way






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






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






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






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

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






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






8. Chunk of rock or dust in space






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






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






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






12. A faint star of enormous density






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






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






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






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






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






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






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






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






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






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






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






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






25. The brilliant explosion of a dying supergiant star






26. Any natural satellite of a planet






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






28. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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






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






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






35. 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.






36. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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