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






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






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






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






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






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






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






8. A graph relating the temperature and brightness of stars






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






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






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






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






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






14. All of the frequencies or wavelengths of electromagnetic radiation






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

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






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






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






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






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






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






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






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






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






25. A star that expands and cools once it runs out of hydrogen fuel






26. The rainbow effect when light is dispersed through lens






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






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






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






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






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






32. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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