December 3, 1973: The probe Pioneer 10 sends photographs of Jupiter, the largest planet in the solar system, back to Earth. These were the first close-up pictures of any of the system's 4 outer "gas giants."
Pioneer 10 was launched from Cape Canaveral, Florida on March 2, 1972, and was intended for a flyby only of Jupiter, no other planets. It was followed a year later by Pioneer 11, which was designed for flybys (flybies? flysby?) of both Jupiter and Saturn, becoming the 1st probe to take close-up photos of the latter.
On the suggestion of astronomer Carl Sagan, each of them carried a 6-by-9-inch gold-anodized aluminum plaque, in case either of them is ever found by intelligent life-forms from another planetary system. The plaques feature the nude figures of a human male and female, along with several symbols that are designed to provide information about the origin of the spacecraft. The plaque is attached to the antenna support struts, where it would be shielded from interstellar dust.
On June 13, 1983, Pioneer 10 crossed the orbit of Neptune, making it the 1st human-made object to leave the Solar System. On April 27, 2002, NASA had its last successful reception of telemetry from Pioneer 10, from a distance of 80.22 AU -- an "astronomical unit" being the distance between the Earth and the Sun, about 93 million miles, so 80.22 AU is about 1.16 billion miles from Earth. A last signal, too weak to learn anything from it, was received on January 23, 2003.
*
December 3, 1973 was a Monday. Actress Holly Marie Combs was born.
Baseball was out of season. There were no games scheduled in the NBA, the ABA, the NHL or the WHA. There was one score on this historic day: On ABC Monday Night Football, the Miami Dolphins beat the Pittsburgh Steelers, 30-26 at the Orange Bowl in Miami.
No comments:
Post a Comment