Scientists have not found a cave in the comet Churyumov-Gerasimenko – Express-News

06.02

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Inside the comet Churyumov – Gerasimenko no large voids. Mission “Rosetta,” the European Space Agency has made the measurement, which is clearly demonstrated and allowed the old riddle. Spacecraft have visited eight comets, and thanks to these missions, we have compiled a picture of the basic properties of space-time capsule. On some questions were found, others appeared.

The primary matter of the solar system was extremely loose and porous. Such a conclusion was made by scientists as a result of research conducted by the comet Churyumov-Gerasimenko

In today’s astronomers, the comet’s mass is about ten billion tons, which is twenty million times the mass of the largest man-made space object -. ISS. Despite his impressive record for an object such as a comet Churyumov-Gerasimenko, it is considered to be small. The reason lies in the extraordinary porosity of the comet – about 70-80% of its volume falls on the emptiness. Its density can be compared with the cork density wood or airgel

In this regard, the scientists raised the question of the distribution of these voids:. Uniformly or concentrated in a large cave or a network of large voids

<. p> the answer to this question was found in the comprehensive study of the gravitational field of the comet. Scientists have come up with an ingenious method of observation, which was used probe “Rosetta”, exploring a comet in August 2014, and a number of radiotarelok in the world.

Martin Petzold from the University of Cologne (Germany) and his colleagues noticed that the gravitational comet field influences as “Rosetta” exchanged information with the Earth, affecting radio frequency. . This and decided to take advantage of scientists

It was found that when the probe came closer to the comet, the fluctuations of its gravitational field arising from the heterogeneity of the subsoil, special way influenced the radio wavelengths: when driving over a particularly dense patches wave comet became shorter, and when passing over voids wavelength increased.

Here are the radio frequencies and vibrations have allowed scientists to make fairly accurate gravity map of the comet Churyumov-Gerasimenko. all large voids and re-measured the mass of the comet, its average density was found. It was found that repeated studies the results were almost the same as the previous ones.

Meanwhile, the gravity of the comet map showed that there are no large caves (several hundred meters) that matter 67P very loose and is on 72-74% of the pores and other microscopic voids between the dust and ice grains

Most of the bowels of the comet dust -. it is about four times larger than the ice crystals, preserved since the birth of the solar system

This discovery allows us today to say that the primary matter of the solar system had similar properties.

Previous MC , referring to the published on the ESA website, reported that mission scientists “Rosetta” announced the presence of water ice on the surface of the celestial body. Reportedly, the spectrometer on board the “Rosetta”, is designed to study the comet’s nucleus and its environment.

Last year, he discovered the comet on 16 organic compounds. Among the finds were carbon, nitrogen and completely new for comets: acetamide, methyl isocyanate, propionaldehyde and simply acetone. The presence of these substances on the comets can say that all of them could exist at the time of the birth of the solar system and comet theory, it could be carriers of these substances on the planet, including the Earth.