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






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






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






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






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






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






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






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






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






10. 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






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






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






13. The spinning of Earth on its axis






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






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






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






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






18. Italian astronomer - mathematician - and physicist. His telescopes proved the sun is the center of the solar system and that the planets/moon move. He was persecuted for supporting Copernicus' ideas.






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






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






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






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






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






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






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






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






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






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






29. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






33. 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






34. Radiation left over from the beginning of the universe






35. The brilliant explosion of a dying supergiant star






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






37. A rapidly spinning neutron star that produces radio waves






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

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






40. Point in orbit that is closest to the sun - planet moves faster






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






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






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






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






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






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

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






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






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






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






Can you answer 50 questions in 15 minutes?



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