CAPE CANAVERAL, Fla. -- A NASA probe
bound to dig into the icy Arctic Circle of Mars is in good health after a
picturesque predawn launch, mission managers said Saturday.
The Phoenix
Mars Lander is precisely on target for its 422 million-mile (679
million-kilometer) trip to the red planet following an early
morning liftoff today from the Cape Canaveral Air Force Station.
"We have a happy spacecraft," said
Ed Sedivy, spacecraft
program manager for Phoenix's
builder Lockheed Martin, during a post-launch briefing here at NASA's Kennedy
Space Center, adding that telemetry from the probe was spot on. "At that
moment, everybody knew that it was the homerun that they were looking for."
A United Launch Alliance Delta 2
rocket blasted
Phoenix into space at 5:26:34 a.m. EDT (0926:34 GMT), leaving a ghostly
contrail of exhaust as the spacecraft left Earth behind. The lander is due to
land on the flat arctic plains near Mars' north pole on May 25, 2008.
"It was the most
beautiful thing I've seen," said Phoenix principal investigator Peter Smith, of
the University of Arizona, of the liftoff. "This cloud turned into what
looked like wings and a beak and a long tail and looked amazingly just like a
phoenix bird, the message to me was: Phoenix bird has risen! And it has. We're
on our way to Mars."
Phoenix is now speeding through
space at about 12,300 miles per hour (19,794 kph) - almost its top speed -
relative to Earth, and should pass beyond the moon's orbit by about 3:00 p.m.
EDT (1900 GMT) this afternoon, mission managers said.
The 772-pound (350-kilogram)
spacecraft's launch was so precise that Phoenix was able to conserve about 22
pounds (10 kilograms) of precious propellant, which will add some maneuvering
flexibility once the probe prepares for its Mars descent next year.
NASA's $420 million Phoenix mission
is aimed at an icy, flat region of northern Mars known as Vastitas Borealis. There, the lander is expected to use
its eight-foot (2.4-meter) robotic arm like a backhoe to carve out samples of
the surrounding martian soil and ice. The samples will be analyzed by onboard
ovens, cameras, microscopes and a wet chemistry laboratory to determine their
chemical makeup.
Researchers are hoping to learn
whether the icy terrain has preserved any organic molecules or compounds within
the martian soil, which may prove useful in determining whether the area may
have once
been habitable for microbial life. Phoenix also carries a laser ranging and
detection tool and other instruments mounted to a meteorology mast to study the
arctic weather on Mars.
Much of Phoenix's structure
and seven-suite science package were developed for or recycled from NASA's
canceled Mars Surveyor 2001 Lander and the ill-fated Mars Polar Lander, which
was lost during its 1999 descent to the martian surface. Phoenix scientists
hope their probe will recover some science lost from the 1999 mission's
failure.
"It's a great day for America, it's
a great day to continue exploration," NASA's Mars program director Doug
McCuistion said after the successful Saturday launch.
SPACE.com Staff Writer Dave
Mosher reported from Cape
Canaveral, Florida.
Staff Writer Tariq Malik reported from New
York City.
advertisement
