| 41. | They lie off the galactic plane in the Gould Belt, a region filled with gas clouds and massive stars.
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| 42. | The orbital inclination is at an angle of from the galactic plane, carrying it as much as above the disk.
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| 43. | If the sources were from within our own galaxy they would be strongly concentrated in or near the galactic plane.
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| 44. | The remaining areas to search are near aphelion, which is located close to the galactic plane of the Milky Way.
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| 45. | Oort proposed the substance after measuring the motions of nearby stars in the Milky Way relative to the galactic plane.
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| 46. | This star lies about 5?from the galactic plane and about 30?from the line of sight to the Galactic Center.
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| 47. | Its thickness is about 10 times that of the rest of the galaxy, extending well above and below the galactic plane.
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| 48. | It reaches a peak distance above the galactic plane of and will cross the plane with a period of 31.7 Ma.
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| 49. | He found that the mass of the galactic plane must be more than the mass of the material that can be seen.
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| 50. | Of the 170 yet-unidentified stable gamma ray sources in the galaxy, about half lie in a narrow band along the galactic plane.
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