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






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






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






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






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






6. The brightness of a star when viewed from Earth






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






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






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






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






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






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






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






14. The rainbow effect when light is dispersed through lens






15. 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






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






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






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






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

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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






37. A model of the solar system in which Earth and the other planets revolve around the sun






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






39. The brilliant explosion of a dying supergiant star






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






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






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






43. Any natural satellite of a planet






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






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






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






47. The spinning of Earth on its axis






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






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






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