Pluto Probe Stays on Earth As Winds Delay Its Launch
Posted on: Saturday, 21 January 2006, 12:00 CST
By AP Wire Service
CAPE CANAVERAL, Fla. (AP) -- High winds forced NASA to scrub the launch Tuesday of an unmanned spacecraft on a nine-year, 3 billion- mile voyage to Pluto, the solar system's last unexplored planet.
NASA planned to try again Wednesday to launch the New Horizons probe, although the forecast held a greater chance of thunderstorms, clouds and gusty winds that could prevent a launch.
Winds at the launch pad Tuesday exceeded the space agency's 38 mph flight restriction.
"The winds picked up sooner than expected," said Richard Binzel, a MIT scientist who is one of the mission's investigators. "Blame the meteorologists."
A successful journey to Pluto would complete an exploration of the planets started by NASA in the early 1960s with unmanned missions to observe Mars, Mercury and Venus.
"What we know about Pluto today could fit on the back of a postage stamp," Colleen Hartman, a deputy associate administrator at NASA, said earlier. "The textbooks will be rewritten after this mission is completed."
The launch also drew attention from opponents of nuclear power because the spacecraft is powered by 24 pounds of plutonium, whose natural radioactive decay will generate electricity for the probe's instruments.
Pluto is the only planet discovered by a U.S. citizen, although some astronomers dispute Pluto's right to be called a planet. It is an oddball icy dwarf unlike the rocky planets of Mercury, Venus, Earth and Mars and the gaseous planets of Jupiter, Saturn, Uranus and Neptune.
"My dad would be absolutely thrilled to see this," said Annette Tombaugh-Sitze, whose father, the astronomer Clyde Tombaugh, discovered Pluto in 1930.
Pluto is the brightest body in a zone of the solar system known as the Kuiper Belt, made up of thousands of icy, rocky objects, including tiny planets whose development was stunted by unknown causes. Scientists believe studying those "planetary embryos" can help them understand how planets were formed.
Source: Tulsa World
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