General Astronomy MCQ
1. Directly above the earth's equator lies the ______________ in the sky.
Answer
Correct Answer:
Celestial equator.
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2. Dinosaurs went extinct, probably because of an impact, about __________ ago.
Answer
Correct Answer:
65 million years
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3. Based on their inability to detect stellar parallax, the ancient greeks concluded that _________.
Answer
Correct Answer:
Either Earth is the center of the universe, or stars are extremely far away
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4. Rigels radius is about _____ times the suns radius.
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5. According to the "rare earth hypothesis," ________.
Answer
Correct Answer:
Planets with intelligent life should be extremely rare
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6. The astrometric technique looks for planets with careful measurements of a star's _________.
Answer
Correct Answer:
Position in the sky
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7. It is diffraction that limits the ________ of a telescope of a given objective diameter.
Answer
Correct Answer:
Resolution.
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8. In essence, the kepler mission searched for extrasolar planets by ____________.
Answer
Correct Answer:
Monitoring stars for slight dimming that might occur as unseen planets pass in front of them
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9. ____ in other galaxies should contain luminous o and b stars if they are like the milky way.
Answer
Correct Answer:
The spiral arms
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10. ____ of the milky way contains mostly old (population ii) stars and globular clusters.
Answer
Correct Answer:
The spherical halo component
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11. The iron in our solar system was created from smaller mass atomic nuclei in ______.
Answer
Correct Answer:
Supernovas
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12. The condensation sequence suggests that ____ should condense as solids closest to the sun.
Answer
Correct Answer:
Metals and metal oxides
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13. The ____ is (are) the hot gases that are the moving extension of the sun's corona.
Answer
Correct Answer:
Solar wind
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14. A newly formed planet or large asteroid becomes molten due to ______.
Answer
Correct Answer:
Both of the above
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15. The sun's absolute magnitude is described as _______ in comparison to other stars.
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16. The hertzsprung-russell diagram plots ________ against the spectral type or temperature.
Answer
Correct Answer:
Luminosity or absolute magnitude
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17. The density of a ____ is greater than the density of a ____.
Answer
Correct Answer:
Pulsar, white dwarf
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18. The crust of mars is believed to ____ than earth's.
Answer
Correct Answer:
None of the above
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19. Sensory information from skeletal muscles travels over ________ fibers.
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20. The point in a planet's orbit where it is closest to the sun is the _____.
Answer
Correct Answer:
Perihelion
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21. We measure the temperature of the stars using the ________ temperature scale.
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22. The virgin galactic will soon _____.
Answer
Correct Answer:
Offer rides into space
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23. The energy that is released in the hydrogen fusion reaction comes from __________.
Answer
Correct Answer:
The difference in mass between the four hydrogen nuclei and the single resulting helium nucleus
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24. The belt of constellations through which all the planets move is called the ________.
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25. Radio telescopes measure the galaxy's distribution of _____.
Answer
Correct Answer:
Hydrogen from which stars are formed
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26. Pulsars are thought to be _________.
Answer
Correct Answer:
Rapidly rotating neutron stars
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27. Newton showed that kepler's laws are _________.
Answer
Correct Answer:
Natural consequences of the law of universal gravitation
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28. Main sequence stars, such as the sun, shine by _________ in their interiors.
Answer
Correct Answer:
Converting hydrogen into helium
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29. In the standard anatomical position, the _____ is the bone of the pelvis found the most superior.
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30. In the formation of our galaxy, the ________ formed first.
Answer
Correct Answer:
Globular clusters
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31. In materials like glass or water the speed of light is _________.
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32. In copernicus' model of the solar system, the planets orbited the _____ in ______ orbits.
Answer
Correct Answer:
Sun, circular
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33. Gamma rays have a very small ______.
Answer
Correct Answer:
Wavelength
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34. If we could see our own galaxy from 2 million light-years away, it would appear _________.
Answer
Correct Answer:
As a flattened disk with a central bulge and spiral arms, spanning a few degrees across the sky
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35. From kepler's ____ law, we conclude that the planets do not move with constant speed.
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36. Compared to the distance between earth and mars, the distance between jupiter and saturn is ______.
Answer
Correct Answer:
Much larger
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37. Based on your answer to part e, the time from one new moon to the next must be _________.
Answer
Correct Answer:
Longer than the Moon's actual orbital period by about 1/12 of the 27-day orbital period
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38. As wavelength increases, the energy of a photon __________ and its frequency __________.
Answer
Correct Answer:
Decreases; decreases
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39. A satellite in elliptical orbit about earth travels fastest when it moves _______.
Answer
Correct Answer:
Close to Earth
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40. Dark matter may explain _____
Answer
Correct Answer:
The source of energy that fuels stars
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41. Two stars orbit each other in a(n) ____ star system.
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42. The total number of stars in the observable universe is about _________.
Answer
Correct Answer:
The number of grains of sand on all the beaches on Earth.
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43. The surface of earth has _____ dimensions:
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44. The spectra of most galaxies show redshifts. this means that their spectral lines _________.
Answer
Correct Answer:
Have wavelengths that are longer than normal.
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45. Much of the solar wind comes from ____ where the magnetic field does not loop back into the sun.
Answer
Correct Answer:
Coronal holes
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46. The overall result of the proton-proton chain is that __________.
Answer
Correct Answer:
4 H --> 1 He + energy.
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47. Hubble's galaxy classification diagram (the ""tuning fork"") ________.
Answer
Correct Answer:
Relates galaxies according to their shapes, but not according to any evolutionary status
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48. As earth travels in its ____, different constellations are visible at different times of the year.
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49. The james webb space telescope is designed primarily to observe __________.
Answer
Correct Answer:
Infrared light
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50. The term organic molecules generally refers to ________.
Answer
Correct Answer:
Molecules containing carbon
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51. The center-of-gravity method is often used to locate__________.
Answer
Correct Answer:
Service facilities
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52. Kepler was the first to be credited for discovering that planets follow __________.
Answer
Correct Answer:
Elliptical paths
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53. To estimate the central temperature of the sun, scientists _________.
Answer
Correct Answer:
Use computer models to predict interior conditions
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54. To calculate the masses of stars in a binary system, we must measure their ________.
Answer
Correct Answer:
Orbital period and average orbital distance
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55. According to al, __________.
Answer
Correct Answer:
The green light illuminates him before the red light because the green light flashes first
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56. Red light has a _____ wavelength and a _____ frequency than does blue light.
Answer
Correct Answer:
Longer, lower
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57. Recent counts show that jupiter has __________________ moons, not including the temporary ones.
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58. Isaac newton synthesized _______.
Answer
Correct Answer:
Terrestrial and cosmic laws
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59. In essence, the kepler mission is searching for extrasolar planets by____________.
Answer
Correct Answer:
Monitoring stars for slight dimming that might occur as unseen planets pass in front of them
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60. Energy balance in the sun refers to a balance between _________.
Answer
Correct Answer:
The rate at which fusion generates energy in the Sun's core and the rate at which the Sun's surface radiates energy into space
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61. As a blackbody becomes hotter, it also becomes __________ and __________.
Answer
Correct Answer:
More luminous; bluer
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62. An observer on earth's equator would find _______
Answer
Correct Answer:
Polaris directly overhead
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63. A star with a spectral class of b2 and an absolute magnitude of 0, would be a _____________ star.
Answer
Correct Answer:
Main sequence
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64. A star with a parallax angle of 1/20 arcsecond is ________.
Answer
Correct Answer:
20 parsecs away
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65. A head-tail radio galaxy is one that has ________ significantly while ejecting its radio lobes.
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Astronomy MCQs | Topic-wise
