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
Leaving the Oort cloud, the Earth is approaching comet Catalina, consisting of primordial matter.
Comet C/2013 US10 Catalina has completed journey around the Sun and is now approaching Earth. The comet will fly at a distance of 108 million km from the planet. It can be seen with the naked eye or in binoculars 17 January 2016 in the area of the constellation URSA major, reports Global Science .
The comet opened in October 2013 with the help of automated search system, which was developed under the project called the Catalina Sky Survey, providing a view of the sky.
C/2013 US10 is one of the many comets are in the Oort cloud, located at a distance of 50-100 thousand astronomical units.
Experts believe that the cloud is material left from the formation of the entire Solar system.
The first Catalina circled around the Sun took place at the end of November. Now the comet can be observed in the constellation of Virgo, however, this requires special optics. Continue reading
Inessa Kozlovskaya of “Space flight: living in zero gravity”
“Space flight: living in zero gravity”.
Gravity existing on Earth for millions of years, has contributed to the development of all life on Earth organisms and invade their system of life as a factor contributing to their successful functioning in the gravitational field of the Earth. Opening up opportunities to systematically study the impact of eliminating gravity, spaceflight facilitated the accumulation of information and facts that contributed to the development of the theory on the role and place of gravitational mechanisms in the various body systems and the development of a new physiological science — gravitational physiology.The most gravity-dependent system of the body is the propulsion system, in which gravity has played such an important role that today we have the right to determine its evolution as the evolution of the struggle of living organisms with gravity wrestling success ended in mammals the development of a strong skeleton, strong muscular system, management systems movements, and information systems able to ensure the perfection of movement in complex conditions of the gravitational field and its izmeneny. Continue reading