A NASA spacecraft plunged into the atmosphere of Mars and landed in the Red Planet's northern polar region to begin 90 days of digging in the permafrost to look for evidence of the building blocks of life.
Cheers swept through mission control at NASA's Jet Propulsion Laboratory late on Sunday night when the touchdown signal from the Phoenix Mars Lander was detected after a nailbiting descent. Engineers and scientists hugged and high-fived one another.
''In my dreams it couldn't have gone as perfectly as it went,'' project manager Barry Goldstein said. ''It went right down the middle.''
Among Phoenix's first tasks were to check its power supply and the health of its science instruments, and unfurl its solar panels after the dust settled. Mission managers said there would be a two-hour blackout period as Phoenix conducted the checks while out of view from Earth.
Phoenix plunged into the Martian atmosphere at more than 19,311 kph after a 10-month, 711 million-kilometre voyage through space.
It performed a choreographed dance that included unfurling its parachute, shedding its heat shield and backshell, and firing thrusters to slow to a 8 kph touchdown.
''Touchdown detected!! We're on the surface of Mars and there is celebration in Mission Control!!'' JPL engineer Brent Shockley blogged from inside mission control.
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