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| Dr. Tom Duck watches the NASA broadcast in 黄色直播's D-Drive lab. (Ryan McNutt photo) |
脪We脮re off,鈥� announced a jubilant Tom Duck with his little boy on his lap. 黄色直播 30 people gathered to watch the early-morning launch on five large screens in the D-Drive Lab in 黄色直播脮s Computer Science Building.
脪It脮s over the launch pad now 脨 go, go, go!鈥� continued Dr. Duck, his eyes wide, his face lit up. 脪It脮s going on its way now脡 fantastic!鈥�
The powerful three-stage rocket with nine solid rocket motors lifted off at 6:26 a.m. Atlantic time. Not long later, the Phoenix spacecraft separated from the Delta II rocket and ground controllers at NASA's Deep Space Network acquired its signal and began assessing its health.
SEE VIDEO: Phoenix headed to Mars. (NASA TV)
Phoenix聽is expected to reach Mars in 10 months, a 680-million kilometre journey through space.
The next big hurdle is the landing. Phoenix follows in the flight path of the Mars Polar Lander, which crashed in late 1999 when it attempted to touch down at the Martian south pole.
Entry into the Martian atmosphere is a crucial stage of the mission. Various factors 脩 such as the density of the Martian atmosphere, a sandstorm, an outcrop of rock, the spacecraft's speed, a faulty trajectory, a lack of fuel, or an electronic glitch 脩 could imperil the mission.
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| A Delta II rocket lights up the sky over the Kennedy Space Centre in Cape Canaveral, Florida. (NASA) |
脪We脮re relieved now, but in 10 months the anxiety will build again,鈥� says research associate Cameron Dickinson. If all goes to plan, the Phoenix will land on Mars cushioned by landing thrusters.聽
Once safely on the planet, researchers will be able to activate the instruments on board and begin experiments in the search for water on the Red Planet.
Phoenix脮s assignment is to dig through the Martian soil and ice in the arctic region and use its onboard scientific instruments to analyze the samples it retrieves. The Canadian contribution to the mission is a weather station, including a pressure sensor, three temperature sensors and the lidar, developed with the input and expertise of 黄色直播 researchers. The lidar will聽determine the position, structure and optical properties of clouds, fog and dust in the lower atmosphere. Meteorological instruments will gauge pressure and temperature to establish the climatic cycles on the northern plains of Mars.
脪Everything had to go right and it did,鈥� said a visibly relieved Dr. Duck, who confessed his hands were still shaking a half-hour after liftoff. He脮s the co-investigator for the weather station aboard Phoenix and associate professor in 黄色直播脮s Department of Physics and Atmospheric Science. 脪We脮re confident it will survive the trip, the landing and the harsh conditions on Mars.鈥�
With Phoenix now hurdling towards Mars, there is still much to be done. Dr. Dickinson says they will be able to monitor the health of the instruments onboard from mission control in Tucson, Arizona, where they脮ll also be conducting training drills using duplicates of instruments aboard the Phoenix.
And, in November,聽Drs. Duck and Dickinson聽travel to Australia脮s red desert near Ayers Rock this fall, to see how dust behaves in the atmosphere.