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






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






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






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






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






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






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






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






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






12. A faint star of enormous density






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






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






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






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






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






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






19. The study of the universe






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






21. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years






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






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






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






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






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






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






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






29. The brightness of a star when viewed from Earth






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






31. Explained movement of planets with retrograde motion






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






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






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






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






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






37. 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






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






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






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






41. Radiation left over from the beginning of the universe






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






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

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






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






46. Radiation left over from the beginning of the universe






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






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






49. The brilliant explosion of a dying supergiant star






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