"Deep Impact" reputation is well prepared to enter the countdown.

<P> LOS ANGELES, July 1 (Xinhuanet) under NASA's Jet Propulsion Laboratory 1, that the plans in the Pacific time on July 3 night for the "Deep Impact" has entered the countdown stage, the experiment .Office of the scientists and engineers have to "crash" in preparation for the coming moment. .</ P> <P> "Deep Impact" project chief scientist Michael Hearn said: "Deep Impact" Comet probe June 23, conducted an orbit adjustment, forward its ultimate goal - Tempel 1 .comet flew rapidly. .Now it away from the comet there are about 2.4 million kilometers, nearly 130 million km from Earth. .Grand Mill Creek project manager, said the scientists and engineers involved in the project are "in good shape." .</ P> <P> according to plan, the detector will be the afternoon of July 2 last orbit adjustment, then we would release the impactor. .Expected impactor in the Pacific time on July 3 around 11 midnight to the speed of 37,000 kilometers per hour, "H" on Tempel 1's nucleus, causing the surface of the ice nucleus, dust and other splashes, like .release in the space of a big "fireworks." .</ P> <P> The impact will be close attention to the scientific community. .Space, "Hubble" telescope, "Spitzer" telescope "Chandra" telescope, Europe's "Newton" astronomical telescope observations from each band. .Ground, the United States Mountain Observatory, Kitt, such as the European Southern Observatory will continue to monitor. .</ P> <P> But scientists say the naked eye can not see the more than 130 million kilometers from Earth, the big "fireworks" in the. .Only certain areas of the Western Hemisphere good visibility in the air, people can see through the high-powered telescope, "Deep Impact." .</ P> <P> "Deep Impact" is a NASA solar system exploration "discovered" a project plan. .Impact envisioned by the comet Tempel 1's nucleus, it exposed the internal material for research. .In their view, the nucleus contains material left over from the solar system birth. .</ P> <P> January 12 this year launched "Deep Impact" probe has so far flown 400 million kilometers or more. .It consists of two parts: one aircraft, about the size of a hatchback car is actually a spaceship; the second is the external copper alloy reinforced by the impactor, weighing about 400 kg, nearly the size of a home refrigerator. .Near the nucleus of the comet Tempel 1, the impactor spacecraft will be ejected, and its nearly 8,000 kilometers in a safe location next to impact the process of observation. .</ P> </ p>.