Test your basic knowledge |

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






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






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






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






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






6. 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






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






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






9. 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.






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






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

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






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






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






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






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






18. Explained movement of planets with retrograde motion






19. The brilliant explosion of a dying supergiant star






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






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






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






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






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






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






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






27. Any natural satellite of a planet






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






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






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






31. 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






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






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






34. Radiation left over from the beginning of the universe






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






36. The rainbow effect when light is dispersed through lens






37. Chunk of rock or dust in space






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






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






40. A faint star of enormous density






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






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






43. A faint star of enormous density






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






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

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






47. 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






48. The elliptical motion of a body as it orbits another body in space






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






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