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Inside the comet 67P/Churyumov — Gerasimenko there are no large voids. The mission of “Rosetta” the European space Agency made measurements that clearly demonstrated and solved the old mystery. Comets are icy debris left over from the formation of the planets 4.6 billion years ago. Spacecraft have visited a total of eight comets, and through these missions we pulled a picture of the basic properties of these space-time capsules. On some questions the answers were found, others appeared.
Comets, as we know, consist of a mixture of ice and dust, and if there were compact, gravity superior to water. However, previous measurements have shown that some of them have very low density, much lower than water ice. Low density means that the comet must be extremely porous.
But what is this porosity: due to large voids in the subsurface of the comet, or due to a more homogeneous structure with low density? Continue reading
Comet 67P/Churyumov-Gerasimenko which is travelling now in the company of the device of the probe Philae and Rosetta could be inhabited, according to The Guardian . According to scientists, testifies to this rich organic compounds black crust of the comet.
According to leading astronomers, its presence can be explained by the presence under the ice crust “of microbes-extremophiles”, able to adapt to the harshest conditions. Similar microbes surviving in extreme conditions in the most inhospitable corners of our planet.
Previously, Rosetta also found a strange accumulation of organic matter, particles reminiscent of viruses.
However, as scholars have noted, neither Rosetta nor Philae is not equipped to directly detect life – then, 15 years ago, when preparing the project, according to astronomer and astrobiology Chandra Wickramasinghe of, over such a proposal would only laugh. Continue reading
Recently a team of American researchers said that the now popular space tourism can be dangerous for climate of the planet. However, many scientists refer to this statement with skepticism. My opinion on this subject the correspondent was expressed by one of the leading experts on space travel, Professor Alexander Bolonkin.
Recently the journal Geophysical Research Letters has accepted for publication an article in which a group of researchers suggests that the currently popular space tourism can be dangerous for climate of the planet. Although it is not yet printed, about this study already talking in many leading online publications. All of the authors of the publications seem to fully support the researchers ‘ view regarding the danger of space travel.
What a project to promote space so scared of scientists from the Aerospace Corporation in Los Angeles (USA)? The fact that, in their view, flying back and forth space “shuttles” are left in the upper atmosphere is a lot of soot, which is a product of incomplete combustion of nuclear fuel. A group of researchers led by Martin Ross built a computer model of such contamination, based on information from business plans for space tourism in ha by 2020, and emissions estimates developed spacecraft SpaceShipTwo company Virgin Galactic’s. Continue reading