![]() ![]() The discovery of strong "megamaser" emission from the hydroxyl (OH) molecule in the starburst galaxy Arp 220 (IC 4553). Richard Behnke reported his information to the American public on the final CBS news broadcast of Walter Cronkite.įirst radar ranging to an Earth-crossing asteroid (1862 Apollo)įirst radar maps of the geologic surface of Venus are produced. These data helped define the probable cause as an air nuclear blast over the Indian Ocean. The message was designed by Frank Drake with the help of Carl Sagan among others, and though its main purpose was to demonstrate the capabilities of newly installed equipment in the upgraded radio telescope, it also constitutes an attempt to contact extraterrestrial intelligence.Ģ2 September 1979, a large, anomalous traveling ionospheric disturbance (that is, an upper atmosphere wave) moving southeast to northwest was detected in the early morning hours - something researchers had never before witnessed. On 16 November 1974, the “Arecibo message” was broadcast into space toward the globular star cluster M13 25,000 light years away. ![]() The first pulsar in a binary system was discovered, leading to important confirmation of Einstein's theory of general relativity and a Nobel Prize 1993 for astronomers Russell Hulse and Joseph Taylor. New high precision surface reflector installed, planetary radar transmitter installed. ![]() The National Astronomy and Ionosphere Center (NAIC) begins. The National Science Foundation assumes operations from DoD, 1 October, 1969. Sporadic radio pulses from the direction of the Crab Nebula supernova remnant found at Green Bank were shown by Arecibo to come from a 33-ms period pulsar situated at the center of the nebula. One of its first accomplishments: Establishing the rotation rate of Mercury, which turned out to be 59 days rather than the previously estimated 88 days. Arecibo Ionospheric Observatory Commissioned for service, 1 November, 1963. ![]()
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