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






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






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






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






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






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






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






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






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






10. The two days of the year on which neither hemisphere is tilted toward or away from the sun






11. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun






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






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






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






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






16. A faint star of enormous density






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






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






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






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






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






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






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






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






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






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






27. The study of the universe






28. A faint star of enormous density






29. 23.5° - the reason we have seasons

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






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






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






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






35. The brightness of a star when viewed from Earth






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






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






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






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






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






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






42. 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






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






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






45. A graph relating the temperature and brightness of stars






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






47. The brightness of a star when viewed from Earth






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






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






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