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






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






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






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






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






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






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






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






9. 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






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






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






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






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






14. 23.5° - the reason we have seasons

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15. A graph relating the temperature and brightness of stars






16. A rapidly spinning neutron star that produces radio waves






17. The brightness of a star when viewed from Earth






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






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






20. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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






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






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






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






28. 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






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






30. A faint star of enormous density






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






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






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






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






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






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






37. The brightness of a star when viewed from Earth






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






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






40. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)






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






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






43. Explained movement of planets with retrograde motion






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






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






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






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






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






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






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