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






2. A rapidly spinning neutron star that produces radio waves






3. A model of the solar system in which Earth and the other planets revolve around the sun






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






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

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6. A faint star of enormous density






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






8. The distance between crests of waves - such as those of the electromagnetic spectrum






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






10. The brightness of a star when viewed from Earth






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






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






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






14. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular






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






16. The brightness of a star when viewed from Earth






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






18. Radiation left over from the beginning of the universe






19. The distance between crests of waves - such as those of the electromagnetic spectrum






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






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






22. 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






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






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






25. The study of the spectra of stars by analyzing the spectral properties of the light they give off






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






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






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






29. A graph relating the temperature and brightness of stars






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






31. All of the frequencies or wavelengths of electromagnetic radiation






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






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






34. 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






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

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






37. The rainbow effect when light is dispersed through lens






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






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






40. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere






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






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






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






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






45. A faint star of enormous density






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






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






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






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

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