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...orbit of the Russian earth satellite is being affected by some force not explained by the laws of gravity, according to a report yesterday by J. Allen Hynek, associate director of the Smithsonian Astrophysical Observatory...

Author: NO WRITER ATTRIBUTED | Title: Unknown Force Affects Sputnik; Motion Not Explained by Gravity | 10/15/1957 | See Source »

...Hynek revealed that information received from both the Naval Research Laboratory in Washington and a Smithsonian staff astronomer in California led to the conclusion that the satellite's orbital plane is apparently turning faster than expected as a result of this unknown force...

Author: NO WRITER ATTRIBUTED | Title: Unknown Force Affects Sputnik; Motion Not Explained by Gravity | 10/15/1957 | See Source »

Twilight Sight. The Russians made their sputnik more conveniently visible in their own territory than in the U.S. during its first trips around the earth, but U.S. observers will get their chance eventually. Dr. Joseph A. Hynek, director of the observatory's satellite-tracking program, calculates that the satellite's orbit shifts around the earth at 4° per day. This will bring it over the U.S. at twilight on about Oct. 20, when it should be visible through small telescopes or binoculars...

Author: /time Magazine | Title: Science: The Sputnik | 10/14/1957 | See Source »

...Allen Hynek, director of the Smithsonian Astrophysical Observatory's optical tracking program, revealed yesterday that three major radio installations--one in New York, one in Chicago, and one in Cambridge--which had previously been picking up the satellite's steady beep beep signal lost radio contact with the object late Monday night and yesterday morning...

Author: By Kenneth Auchincloss, | Title: Russian Satellite Sends Signals After Silence of Several Hours | 10/9/1957 | See Source »

...Hynek said last night that with the sighting data now assembled "it is very likely that we can work out a definite orbit within 24 hours...

Author: By Kenneth Auchincloss, | Title: Russian Satellite Sends Signals After Silence of Several Hours | 10/9/1957 | See Source »

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