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. Chunk of rock or dust in space






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






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






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






5. A rapidly spinning neutron star that produces radio waves






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






7. Explained movement of planets with retrograde motion






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






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






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






11. The spinning of Earth on its axis






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






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






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






15. The brilliant explosion of a dying supergiant star






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






17. A group of about 30 galaxies that includes the Milky Way






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






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






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






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






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






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






24. The brightness of a star when viewed from Earth






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






42. A graph relating the temperature and brightness of stars






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






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






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






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






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






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

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50. 23.5° - the reason we have seasons

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