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






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






3. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece






4. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece






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






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






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






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






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






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






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






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






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






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






15. 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.






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






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






18. Any natural satellite of a planet






19. A graph relating the temperature and brightness of stars






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






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






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






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






24. A faint star of enormous density






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






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

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






28. The study of the universe






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






30. The brilliant explosion of a dying supergiant star






31. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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

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






37. 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






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






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






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






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






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






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






44. All of the frequencies or wavelengths of electromagnetic radiation






45. The brightness of a star when viewed from Earth






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






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






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






49. Radiation left over from the beginning of the universe






50. 23.5° - the reason we have seasons

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