"Phoenix" successfully landed on Mars a month to find life on Mars, "biological" (Figure).

<P Align=center> Keywords: Phoenix successfully landed on Mars to find biological life </ P> <P align=center> </ P> <P align=center> "Phoenix" landed on Mars exploded </ P> < .P align = center> </ P> <P align=center> "Phoenix" spacecraft carrying seven "arms" </ P> <P> has transmitted its first images, life may be about 1 month .</ P> <P> after almost 10 months of space travel, the National Aeronautics and Space Administration (NASA) newest Mars probe "Phoenix" at the time of the American West at 16:53 on May 25 (Beijing time 26 .7:53) successfully landed on Mars in the Arctic. .This is the first in the Martian spacecraft to near the North Pole. ."Phoenix" was the main mission is to tap the ice, and detection equipment used to carry the existence of the red planet living environment for microorganisms. .</ P> <P> most difficult part is over </ P> <P> According to U.S. media reports, "Phoenix" was returned safely after the signal, NASA Jet Propulsion Laboratory mission control room suddenly burst into cheers .sound, scientific research and engineering staff hugged each other excitedly, clapping to celebrate. .Engineer Brent Shockley once wrote in a blog: "We recognize the landed! Arrived at the surface of Mars, the control room is being celebrated." "Phoenix" project manager Barry Gold shouted excitedly Stein .: "I never dreamed could be so perfect landing!" </ P> <P> from a 19,000 km an hour into the thin Martian atmosphere to land on its surface, "Phoenix" has gone through so-called "7 minutes of terror ."because it completely rely on their own computer instructions to complete the operation, and ground controllers can not see this process. .This series of actions, including provisions to open the parachute gear, discarded heat shield and extended three legs, open the device to further slow down the buffer to launch until reduced to 8 km per hour in order to achieve support a "soft landing." .Data, "Phoenix" was the final touch the ground when the ground is almost completely parallel with the inclination of less than 0.25 degrees. .</ P> <P> again a soft landing on Mars </ P> <P> from the human exploration of Mars since landing attempt more than half of the detectors have failed. .This is the 1976 NASA "Pirates" was the first time since achieving a soft landing on Mars. .In 1999, NASA "Mars Polar Lander who" was tried a soft landing, but due to altimeter failure, so the buffer ahead of the engine to stop working, resulting in a direct crash. .In 2004, the "Spirit" and "Opportunity" rover had two parachutes and airbags to rely on slow success hard landing, but this method does not apply to "Phoenix" was too large detector such weight as it .To use the larger, heavier air bags to ensure security, this is bound to be used for other detection equipment to reduce the effective load. .</ P> <P> returned the first Mars images </ P> <P> "7 minutes of terror" period, "Phoenix" arrived in Mars orbit by 2001, running along the orbit around Mars, "Mars Odyssey" was detected .device, the successful implementation of continuous radio communications with Earth. .Radio wave propagation speed of light the signal back to Earth from Mars takes 15 minutes. .</ P> <P> "Phoenix" in the 2 hours after landing on Mars has transmitted its first images. .In the "Phoenix" returned the first images, and some show "Phoenix" of solar panels has begun, and some show one of its feet "step" in the Martian ground, near the small rock, and some show .the horizon of the Arctic region of Mars. .</ P> <P> Associated Press said, "Phoenix" landed images of early returns are mainly the work of the state to provide technical information, including the power supply situation and equipment good condition. .According to design standards, land raised the dust dispersed, the "Phoenix" will only be solar panels. .</ P> <P> explore the history of life on Mars, World Scientific reports </ P> <P> "Phoenix" is the first probe to Mars in the Arctic, specifically in the Martian north pole landing site is a low around 48 km wide shallow .the valley, the equivalent of Greenland or Alaska in the position of the earth. .Arctic region was chosen partly because the terrain here is relatively flat, on the other hand, according to the scientists on analysis of satellite images of Mars, the Arctic may be shallow to seal the ice surface, which may be to save the planet organic molecules, bacterial cells .microbial and other forms of life history. .</ P> <P> Therefore, subsurface ice on Mars collected and analyzed is the "Phoenix" was the primary task of this trip is different from other Mars missions of their differences. .In the first week, it will use the "eyes" on the red planet for some "tourist" to return to the ground to collect data and images. .Next, it will stretch out a 2.4 m long arm of mechanical mining, excavation taking ice. .This is made of aluminum, titanium and other metal material can be bent arm, end with a drill that can dig trenches 60 cm deep, and the location of ice from the surface may be a few centimeters to 30 centimeters. .</ P> <P> "Phoenix" will be to remove the soil and ice samples into the instrument for analysis, looking for organic and chemical composition of life. .In addition, it will also study whether ice on Mars ever melted before, because Mars, there have been much warmer climate than now. .</ P>.