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






2. The rainbow effect when light is dispersed through lens






3. A star that ejects some of its material in the form of a cloud and become more luminous in the process






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






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






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






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






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






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






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






11. The spinning of Earth on its axis






12. 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.






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






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






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






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






17. The brightness of a star when viewed from Earth






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






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






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






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






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






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






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






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






26. The two days of the year on which neither hemisphere is tilted toward or away from the sun






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






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






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






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






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






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






33. Any natural satellite of a planet






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






35. A rapidly spinning neutron star that produces radio waves






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






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






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






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






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






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

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






43. A faint star of enormous density






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






45. 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.






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






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






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






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






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

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