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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 small - dense remains of a high-mass star after a supernova






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






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






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






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






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






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






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






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






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






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






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






13. 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.






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






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






16. An enormously bright - distant galaxy with a giant black hole at its center






17. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding






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






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






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






21. The rainbow effect when light is dispersed through lens






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

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






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






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






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






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






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






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






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






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






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






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

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






35. A large cloud of dust and gas that can break apart into smaller pieces and form stars






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






37. Any natural satellite of a planet






38. The farther away a galaxy is - the faster it is moving away

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






40. A faint star of enormous density






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






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






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






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






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






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






47. The study of the universe






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






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






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







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