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Test your basic knowledge |
Astronomy Basics
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Subject
:
science
Instructions:
Answer 50 questions in 15 minutes.
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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 system of two stars that revolve around each other under their mutual gravitation
binary star
neutron star
nebula
moon
2. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
asteroid
parallax
meteor
Galileo Galilei
3. A large body in space that orbits a star and does not produce light of its own
Johannes Kepler
background radiation
nebula
planet
4. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)
Nicolaus Copernicus
supernova
perigee
rotation
5. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
red giant
solstace
blue shift
refracting telescope
6. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
radio telescope
big bang theory
nova
spiral galaxy
7. A group of stars that form a pattern in the sky
constellation
planetesimal
lunar eclipse
precession
8. The apparent change in position of an object when seen from different places
constellation
parallax
electromagnetic spectrum
Kuiper Belt
9. An elongated circle - or oval shape - the shape of the planets orbit
big bang theory
ellipse
Tycho Brahe
retrograde motion
10. Point in orbit that is closest to the sun - planet moves faster
refracting telescope
perhelion
accretion
electromagnetic spectrum
11. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
Hubble's law
constellation
galaxy
galaxy cluster
12. An extremely bright star of very large diameter and low density
heliocentric
quasar
supergiant
continuous spectrum
13. A measure of the amount of light that a star actually emits
neutron star
absolute magnitude
planet
Oort Cloud
14. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
rotation
spectroscopy
accretion
asteroid
15. A system of galaxies containing from several to thousands of member galaxies
asteroid
galaxy cluster
white dwarf
accretion
16. A star that expands and cools once it runs out of hydrogen fuel
absolute magnitude
parallax
red giant
white dwarf
17. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources
planet
earth's tilt
irregular galaxy
radio telescope
18. The distance between crests of waves - such as those of the electromagnetic spectrum
pulsar
wavelength
main-sequence star
Halley's Comet
19. The two days of the year on which neither hemisphere is tilted toward or away from the sun
retrograde motion
equinox
solstace
perigee
20. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
solstace
Halley's Comet
geocentric
main-sequence star
21. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
reflecting telescope
absolute magnitude
accretion
galaxy
22. The increase in wavelength of light due to an object moving away from the observer
red shift
spectroscopy
nebula
light-year
23. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
main-sequence star
phases of the moon
Jovian planet
solar eclipse
24. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
solar eclipse
absorption spectrum
blue shift
photon
25. The small - dense remains of a high-mass star after a supernova
element
irregular galaxy
neutron star
spectroscopy
26. The most distant point in the orbit of the moon
apogee
phases of the moon
Hertzsprung-Russel Diagram
geocentric
27. A spectrum of light in which there are no gaps - so that each region blends directly into the next
perigee
supergiant
background radiation
continuous spectrum
28. An elongated circle - or oval shape - the shape of the planets orbit
protostar
ellipse
rotation
chromatic abberation
29. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
red shift
terrestrial planet
phases of the moon
nova
30. English mathematician and physicist - discovered the law of universal gravitation
apogee
Galileo Galilei
meteroid
Sir Isaac Newton
31. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
black hole
Claudius Ptolemy
element
Hubble Space Telescope
32. 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
nebula
big bang theory
solstace
universal gravitation
33. A very small star with low temperature - reddish in color
red dwarf
neutron star
solstace
asteroid
34. Point in orbit that is closest to the sun - planet moves faster
precession
perhelion
ellipse
aphelion
35. 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
spiral galaxy
neutron star
Hertzsprung-Russel Diagram
red shift
36. An extremely bright star of very large diameter and low density
supergiant
Hertzsprung-Russel Diagram
quasar
terrestrial planet
37. Any substance that cannot be broken down into simpler substances
chromatic abberation
solar eclipse
element
comet
38. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
earth's tilt
nebula
perigee
apogee
39. When the moon passes between earth and the sun - blocking the sunlight from reaching earth
elliptical galaxy
black hole
meteroid
solar eclipse
40. Spectrum of electromagnetic radiation emitted by a self-luminous source
astronomical unit (AU)
main-sequence star
galaxy cluster
emission spectrum
41. Galaxy with no particular shape - contains new & old stars
retrograde motion
precession
background radiation
irregular galaxy
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
red shift
Claudius Ptolemy
Hubble Space Telescope
Halley's Comet
43. 23.5° - the reason we have seasons
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44. The study of the universe
solar eclipse
Tycho Brahe
astronomy
red giant
45. Radiation left over from the beginning of the universe
background radiation
local group
spiral galaxy
neutron star
46. Explained movement of planets with retrograde motion
spectroscopy
Claudius Ptolemy
milky way galaxy
absolute magnitude
47. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
Johannes Kepler
solstace
moon
big bang theory
48. The rainbow effect when light is dispersed through lens
planet
doppler effect
chromatic abberation
big bang theory
49. Change in the apparent frequency of a wave as observer and source move toward or away from each other
doppler effect
absorption spectrum
Hubble's law
photon
50. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
lunar eclipse
emission spectrum
absorption spectrum
planetesimal
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