Possibly, comets brought water to Earth
To see exactly what is in the comet, it is necessary to analyse its substance with the help of different high sensitive devices, bringing samples to Earth. But aboard a small spacecraft such devices are difficult to place, because the size of the station Stardust 1,7×0,7×0,7 meters – about the same size as the Desk. How to take a sample of matter, flying from the comet’s nucleus at high speed? Space standards Stardust was moving slowly relative to the comet, about one and a half times slower than fly around the Earth artificial satellites. However, even this speed was several times greater than that of the bullet, the station flew over one second 6 km from the Contact of dust particles with the container of solid material at this speed (more than 20 thousand km/h) would have led to their strongest heating and evaporating. The only way to mildly catch and stop these dust particles, turned out to be a trap made of unique material – aerogel, which was established in 1931, but the big distribution has not received. Continue reading
NASA experts will soon do something that previously could only dream of and fantastic to shoot movies – get inside the comet. If all goes according to plan, tomorrow from the spaceport at Cape Canaveral launched the Deep Impact spacecraft, which will install a copper tube in the path of the comet Tempel 1. It is expected that celestial body will meet 372 kg heavy probe in a milestone for all Americans day – 4 July. After collision at a speed of 37 thousand km/h on the surface of the comet forms a crater the size of a ten-storey house.
The probe (it is a probe, not just RAM) immediately after the collision and the subsequent explosion will take samples of rocks that make up the nucleus of Tempel 1, and cameras mounted on the spacecraft, will take off the “dock” from beginning to end. All the information you plan to transmit it immediately to Deep Impact, located at a safe distance. “We will take the most powerful camera,” said astronomer Michael A’hearn, principal investigator of the project from the University of Michigan. For the clash will be the NASA orbital telescopes. In addition, the orbital meeting, which, according to forecasts, will remind fabulous fireworks will be visible using conventional ground-based telescopes. Continue reading
Flight to Mars, flight to Mars how far is Mars how to fly to Mars, mission duration to Mars
The planet Mars is one of the brightest objects in the night sky. Like a bright red star, it is visible to the naked eye in the night sky. Approximately every two years, Mars and Earth reach their closest point, called “opposition”. At this point, the distance between Mars and Earth is about 55 million kilometers. Almost every two years, the scientists take this opportunity to send to the red planet spacecraft. So how long does it take the spacecraft to reach Mars?
The total time of flight from Earth to Mars varies from 150 to 300 days, depending on the speed of launch, the position of the planets, the route and the amount of fuel on Board.
The first spacecraft to reach Mars was Mariner 4. The device was launched on 28 November 1964. On Mars he arrived on 14 July 1965, where he successfully made a series of 21 Photos. Continue reading