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






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






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






4. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation






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






6. Any natural satellite of a planet






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






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






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






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






11. 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.






12. The rainbow effect when light is dispersed through lens






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






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






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






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






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






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






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






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






21. All of the frequencies or wavelengths of electromagnetic radiation






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






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






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






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






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






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






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






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






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






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






32. The brilliant explosion of a dying supergiant star






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






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

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






36. The brightness of a star when viewed from Earth






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






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






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






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






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






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






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






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






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






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






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






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






49. A graph relating the temperature and brightness of stars






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






Can you answer 50 questions in 15 minutes?



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