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






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






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






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






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






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






7. The spinning of Earth on its axis






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






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






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






11. Galaxy with no particular shape - contains new & old stars






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






13. The rainbow effect when light is dispersed through lens






14. A faint star of enormous density






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






16. A spherical region of comets that surrounds the solar system






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






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






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






20. Any natural satellite of a planet






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






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






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






24. 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






25. The rainbow effect when light is dispersed through lens






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






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






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






29. Chunk of rock or dust in space






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

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






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






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






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






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






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






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






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






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






40. Explained movement of planets with retrograde motion






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






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






43. A faint star of enormous density






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






45. A graph relating the temperature and brightness of stars






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






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






48. A faint star of enormous density






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






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






Can you answer 50 questions in 15 minutes?



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