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61 The unit includes the proposed Iridium global communications system that will use 66 low earth orbit satellites.

62 Weight was slowly ebbing; the rockets were being throttled back as the ship eased itself into orbit.

63 One month later a second satellite was launched into a somewhat higher orbit, of between 234 and 244 miles.

64 This changes them from a circular orbit to an elliptical one.

65 For r slightly greater than 21. 0, a periodic orbit was not detected in the numerical results.

66 In the early years of its life, Newton's gravitational theory was falsified by observations of the moon's orbit.

67 Perhaps the moon would spin out of its orbit and come crashing into the earth.

68 The system is not expected to leak while the craft is in orbit and the hydraulics are not in use.

69 But some, including Eros,(sentencedict.com) wander out of the asteroid belt and into the inner solar system during each orbit.

70 He initiated the development of space-based photographic surveillance satellites and the Agena rocket stage to insert them into orbit.

71 We do it now on a small scale to bring the rocks into Earth orbit from the asteroid belt.

72 By the middle of the nineteenth century it had been firmly established that there was something curious about Mercury's orbit.

73 All but one of these orbit in the asteroid belt, safely beyond the orbit of Mars.

74 There is a long history of stations in Earth orbit that have met with varying degrees of success.

75 Supplies could be put in orbit and brought down as needed by a braking system.

76 Inside a spacecraft in orbit round the Earth an astronaut could float weightless, hardly in contact with the floor.

77 The sudden breeze introduced through the open door disturbed the orbit of the drone and sent the Doctor drifting slowly backwards.

78 Spiderglass could not die: a chain of spiderglass hubs girdled the orbit of Earth.

79 The dust cloud begins to smear out along the orbit of the comet.

80 In 1976 a small asteroid, 2062 Aten, was discovered in an orbit that actually circles the Sun faster than Earth.sentencedict.com

81 Some squatters were incorporated within the local housing orbit, some weren't.

82 For example, consider a spacecraft flying in an elliptical orbit and burning its engines at the moment it reaches perigee.

83 A spacecraft passing through its perigee point is moving faster than an equivalent craft on a circular orbit of the same radius.

84 The earth moves around the sun in an elliptical orbit.

85 One modern example is a space capsule in orbit around the earth; another is a capsule falling radially toward the Earth.

86 Discovery would enter a parking orbit around Saturn, be-coming a new moon of the giant planet.

87 An arrangement of more than four similar events into a circular orbit emphasises the centre, which may be occupied or not.

88 Almost 1,000 small asteroids crossing our orbit are now known, 300 of them found last year alone.

89 The spacecraft enters into a more eccentric orbit, however the height and position of perigee remains the same.

90 Of course an infinite number of equatorial orbits exist, but only one geostationary orbit.