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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
What is the biggest planet? This is of course Jupiter. The atmosphere of the biggest planet on Earth reaches 120 degrees Kelvin or minus 153 degrees Celsius. In addition, the atmosphere of the planet consists of 90% hydrogen and 10% helium. Still, astronomers can’t explain why the largest planet in the world has orange, pink, blue and brown spots. And all because at low temperature the atmosphere of Jupiter must be colorless.
There is only the assumption that the color of the clouds is colored by impurities of sulfur compounds. Also worth noting is that the coloring of the clouds is constantly changing. Photo of the largest planet in the form of a Huge red Spot was obtained by Voyager 1 spacecraft. In 1979, he flew over Jupiter at a distance of 9.2 million miles. The Photo shows a red spot too. This is an area that is too complex and variable wave motion.
This Photo of the largest planet Jupiter is considered to be the most clear, which were once obtained from the Earth. On Jupiter there are also storm clouds, as on Earth. This is the state of the atmosphere of Jupiter, you can see in the Photo below. Near the Great red Spot is the area of a riot of clouds. Low clouds are blue and high white. Here wysokiego and represent storm clouds. Scientists say that these clouds can hardly be seen as proof that the biggest planet in the solar system there is water. It is worth noting that on Jupiter winds reach speeds of 480 km/h. Continue reading
Space when observed with the naked eye
Comets and meteors
Unlike stars and planets that the naked eye perceives as a luminous point, the comet is observed in the form of an elongated spot, in which through careful observation can see the relatively bright concentration – “head” and a conical “tail”. With the aid of the telescope each year find 5-10 comets, but rarely any of them are so bright that accessible to observation with the naked eye. Like planets, comets move around the Sun. But unlike the planetary orbits of the trajectory of comets typically have very elongated. The periods of revolution around the Sun fills the interval from a few years (comet Encke is for 3.28 years) to several thousand years (comet Hale-BOPP – 3000 years).
The comet nucleus, from which emerge jets of gas, plasma and dust all the more intense, the closer to the perfect Sun the comet is a huge (from kilometers to tens of kilometers in diameter) snowball. It is composed of molecules containing hydrogen, oxygen (e.g., H 2 O), carbon and nitrogen, as well as from dust, which escapes as ice sublimation (i.e., in the transition to the gaseous state under the action of radiation of the Sun). In the core there are larger solid particles. Continue reading