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






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






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






4. 23.5° - the reason we have seasons

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






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






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






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






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






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






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






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






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






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






16. Explained movement of planets with retrograde motion






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






18. A rapidly spinning neutron star that produces radio waves






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






20. The rainbow effect when light is dispersed through lens






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






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






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






24. A faint star of enormous density






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






26. A faint star of enormous density






27. 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






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






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






30. Radiation left over from the beginning of the universe






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






32. Explained movement of planets with retrograde motion






33. A graph relating the temperature and brightness of stars






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






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






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






38. A spherical region of comets that surrounds the solar system






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






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






41. The brilliant explosion of a dying supergiant star






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






43. 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






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

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






46. A faint star of enormous density






47. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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

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