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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. All of the frequencies or wavelengths of electromagnetic radiation
Tycho Brahe
geocentric
apogee
electromagnetic spectrum
2. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
absolute magnitude
Johannes Kepler
galaxy
Kuiper Belt
3. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources
emission spectrum
radio telescope
moon
the big crunch
4. Explained movement of planets with retrograde motion
precession
parallax
Claudius Ptolemy
irregular galaxy
5. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
universal gravitation
light-year
spiral galaxy
meteorite
6. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
phases of the moon
reflecting telescope
accretion
pulsar
7. The spinning of Earth on its axis
neutron star
apogee
equinox
rotation
8. Light distance travels in one year (9.5 trillion km)
light-year
parallax
main-sequence star
perhelion
9. The study of the universe
astronomy
neutron star
aphelion
Sir Isaac Newton
10. The study of the spectra of stars by analyzing the spectral properties of the light they give off
spectroscopy
protostar
nebula
absorption spectrum
11. The distance between crests of waves - such as those of the electromagnetic spectrum
accretion
supernova
wavelength
planetesimal
12. A faint star of enormous density
refracting telescope
white dwarf
spiral galaxy
nebulae
13. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
heliocentric
Hubble Space Telescope
astronomy
Tycho Brahe
14. The rainbow effect when light is dispersed through lens
light-year
Galileo Galilei
coma
chromatic abberation
15. The average distance between the Earth and the sun - or approximately 150000000 km
light-year
astronomical unit (AU)
protostar
Hubble's law
16. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
Johannes Kepler
milky way galaxy
meteorite
apogee
17. A group of about 30 galaxies that includes the Milky Way
local group
evolution
Oort Cloud
white dwarf
18. 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
photon
aphelion
big bang theory
neutron star
19. A large cloud of dust and gas that can break apart into smaller pieces and form stars
perhelion
nebula
wavelength
local group
20. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation
heliocentric
Galileo Galilei
cepheid variable
quasar
21. The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
Tycho Brahe
absorption spectrum
red shift
precession
22. The most distant point in the orbit of the moon
binary star
constellation
Sir Isaac Newton
apogee
23. Change in the apparent frequency of a wave as observer and source move toward or away from each other
apparent magnitude
doppler effect
spiral galaxy
evolution
24. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
geocentric
nebula
milky way galaxy
precession
25. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
supergiant
terrestrial planet
constellation
absorption spectrum
26. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
galaxy cluster
asteroid
spectroscopy
blue shift
27. The distance between crests of waves - such as those of the electromagnetic spectrum
wavelength
universal gravitation
Nicolaus Copernicus
galaxy cluster
28. A large body in space that orbits a star and does not produce light of its own
Hubble's law
earth's tilt
planet
red dwarf
29. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
refracting telescope
terrestrial planet
black hole
absolute magnitude
30. An elongated circle - or oval shape - the shape of the planets orbit
planetesimal
nova
blue shift
ellipse
31. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
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32. A model of the solar system in which Earth and the other planets revolve around the sun
universal gravitation
solstace
red shift
heliocentric
33. A system of two stars that revolve around each other under their mutual gravitation
neutron star
binary star
milky way galaxy
supergiant
34. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere
blue shift
meteor
planetesimal
red shift
35. A graph relating the temperature and brightness of stars
electromagnetic spectrum
Hertzsprung-Russel Diagram
red giant
blue shift
36. An extremely bright star of very large diameter and low density
supergiant
galaxy
retrograde motion
milky way galaxy
37. The apparent westward motion of the planets with respect to the stars
retrograde motion
perhelion
radio telescope
nebulae
38. Spectrum of electromagnetic radiation emitted by a self-luminous source
planet
cepheid variable
Galileo Galilei
emission spectrum
39. A faint star of enormous density
nebula
electromagnetic spectrum
white dwarf
element
40. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
geocentric
elliptical galaxy
Claudius Ptolemy
milky way galaxy
41. A measure of the amount of light that a star actually emits
white dwarf
Nicolaus Copernicus
light-year
absolute magnitude
42. The two days of the year on which neither hemisphere is tilted toward or away from the sun
nebula
red shift
equinox
Oort Cloud
43. Point of moon's orbit when it is nearest the earth
Nicolaus Copernicus
perigee
comet
quasar
44. The average distance between the Earth and the sun - or approximately 150000000 km
geocentric
Hubble Space Telescope
astronomical unit (AU)
evolution
45. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
radio telescope
apparent magnitude
astronomical unit (AU)
galaxy
46. Point in orbit that is closest to the sun - planet moves faster
nova
apparent magnitude
perhelion
local group
47. A system of two stars that revolve around each other under their mutual gravitation
red shift
binary star
Galileo Galilei
aphelion
48. Massive clouds of dust and gases where stars are born
coma
nebula
big bang theory
nebulae
49. A measure of the amount of light that a star actually emits
absolute magnitude
apogee
astronomical unit (AU)
supernova
50. A star that falls into the main sequence category on the H-are diagram
irregular galaxy
binary star
astronomy
main-sequence star
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