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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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

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21. All of the frequencies or wavelengths of electromagnetic radiation






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






23. A faint star of enormous density






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






25. The brightness of a star when viewed from Earth






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






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






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






29. A graph relating the temperature and brightness of stars






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






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






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






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






34. The brilliant explosion of a dying supergiant star






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






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






37. The elliptical motion of a body as it orbits another body in space






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






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






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






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






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






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






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






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






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






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






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






49. 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






50. The spinning of Earth on its axis