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Their conclusion: the pulsar is wobbling, pulled by the gravitational field of a planet that orbits the star once every six months. When the planet is nearest earth, it tugs the pulsar in our direction, and the distance that the radio pulse travels to reach us starts to get shorter. Three months later, the planet pulls the pulsar the other way, and the distance the pulse must travel begins to lengthen...
ENVIRONMENTALISTS AND RECREATIONALISTS. Both groups were in shorter supply when the Colorado was being harnessed than they are today, and their concerns often diverge. A recreationalist's dream -- a motorboat rally on Lake Havasu, with plenty of beer -- is a nature lover's nightmare. But some vacationers come to the river merely to hike or look at wildlife, and they are as likely to be disturbed by the encroachments of civilization and mechanized control as are the environmentalists. Says Darrell Knuffke, the Central Rockies regional director of the Wilderness Society: "As the river has been divided, subdivided, ditched, dammed...
...committee was formed. Committee chair and spokesperson Charles P. Slichter had no comment. A few months later, a preliminary list of candidates was revealed. Slicther had no comment. In November, the committee met with a few undergraduates. Slichter did not attend and was unavailable for comment. In January, a shorter list was published. Slichter remained...
...lack of serious debate, council meetings this year were shorter than usual. Even the most articulate representatives couldn't come up with witty dissent to milk-and-cookies study breaks or congratulatory letters to President-designate Neil L. Rudenstine...
...this difference in travel time that sets up Gott's time machine. Imagine a rocket ship moving at 99.9999% of light speed and taking the shorter of the two paths. In principle it could reach the far side of a string at exactly the same moment as a light ray traveling the longer path. In essence the ship would be moving faster than light, and under the peculiar logic of special relativity, it would thus go backward in time. For complex reasons, the ship has to make a complete loop around the string, and thus a single string will...