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. A star that falls into the main sequence category on the H-are diagram






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






3. The theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature






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






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






6. 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






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






8. A faint star of enormous density






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






25. The rainbow effect when light is dispersed through lens






26. The two days of the year on which neither hemisphere is tilted toward or away from the sun






27. An enormously bright - distant galaxy with a giant black hole at its center






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






29. A rapidly spinning neutron star that produces radio waves






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






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






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

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






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






35. Massive clouds of dust and gases where stars are born






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






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






38. The place in the orbit of a planet where the planet is farthest from the sun






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






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






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






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






43. Chunk of rock or dust in space






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






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






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






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






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






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






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