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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 measure of the amount of light that a star actually emits






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






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






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






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






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






7. The spinning of Earth on its axis






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






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






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






11. A large cloud of dust and gas that can break apart into smaller pieces and form stars






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






13. A graph relating the temperature and brightness of stars






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






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






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






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






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






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






20. The brilliant explosion of a dying supergiant star






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






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






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






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






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






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






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






28. 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






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






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






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






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






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






34. 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






35. Explained movement of planets with retrograde motion






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






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






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






39. The brightness of a star when viewed from Earth






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






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






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






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






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






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

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46. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases






47. A rapidly spinning neutron star that produces radio waves






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






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






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







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