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






3. The rainbow effect when light is dispersed through lens






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






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

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






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






8. A graph relating the temperature and brightness of stars






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






10. The brilliant explosion of a dying supergiant star






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






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






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






14. A spectrum of light in which there are no gaps - so that each region blends directly into the next






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






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






17. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern






18. The brightness of a star when viewed from Earth






19. The brilliant explosion of a dying supergiant star






20. 23.5° - the reason we have seasons

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






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






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






24. A faint star of enormous density






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






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






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






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






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






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






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






32. 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






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






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






35. A contracting cloud of gas and dust with enough mass to form a star






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






37. 23.5° - the reason we have seasons

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






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






40. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun






41. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth






42. The spinning of Earth on its axis






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






44. A faint star of enormous density






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






46. 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.






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






48. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth






49. A graph relating the temperature and brightness of stars






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