Comet rain could bring life in the vicinity of Jupiter

Disintegrated into dust, asteroids and comets are scattered around the material, rich in carbon compounds. Perhaps some of it has settled on the satellites of the gas giant.

Disintegrating comet dust could to place on the moons of Jupiter the seeds of life. Including in Europe, under the icy shell of which, hopefully, is hidden ocean.

Jupiter's moons are divided into two types: large spherical satellites and less lumpy body with eccentric orbits. Chemical analysis of the past suggests that they are made from a material of asteroids and comets. In other words, they most likely are rich carbon compounds that play a key role in life on Earth.

Mick Hyde.) "Height =" 413 "width =" 600 ">
Left to right: Europa, Ganymede, Jupiter. (Photo by Mick Hyde.)

It is believed that the gravity of the planets shuffling that occurred about 4 billion years ago, shook the remote zone space rocks, which is why some of them on a journey towards the Sun. Part is trapped by Jupiter — they were his irregular satellites. Furnished our new location on the objects were often collide, producing a dust-sized particles of coffee powder.

If we believe the model, Jupiter took about 70 million Gt of material, but its mass is irregular satellites half. "Where are the rest?" — Asked myself and colleagues William Bottke of the Southwest Research Institute (USA). Modeling the evolution of irregular moons showed that the dust was fond attraction of Jupiter and the solar wind. About 40% of the material could settle on a large satellite Planet, primarily on Callisto, Ganymede and then, and only then to Europe.

The data obtained in part correspond to the images that are sent by the spacecraft "Galileo": Ganymede and Callisto, and indeed there is a dark material. Mr. Bottke seems that Callisto completely covered with debris, while Ganymede is still lighter.

But the surface of Europa is relatively clean. The cracks in the crust indicate that the surface material is exchanged with the interior of the satellite, so the carbon-rich material could go straight into the ocean, believes Mr. Bottke. "He played a role there? Hard to say. But fun to think about it ", — says the scientist.

Calculations Mr. Bottke establish a lower bound of the number of carbon-containing material that could fall into the ocean in Europe, says Cynthia Phillips of the Institute SETI. "Maybe there were other sources of interest to the astrobiological point of view of the material," — she said.

The study is published in the journal Icarus.

Prepared according to NewScientist.

Category: Space

Добавить комментарий

Tags: , , , , , ,

Site "Survival in the wild nature", glad to see you. If you come to us, it means you want to get complete information about survival in a variety of extreme conditions, in emergency situations. Man, throughout the development, sought to preserve and protect themselves from the various negative factors surrounding it - cold, heat, hunger, dangerous animals and insects.

Site structure "Survival in the wild nature" is simple and logical, selecting a specific section, you will find information. You will find on our website recommendations and practical advice on survival, unique descriptions and pictures of animals and plants, turn-based scheme to trap wild animals, tests and reviews of travel gear, rare books on survival and wildlife. The site also has a large section devoted to video on survival survivalist-known professionals around the world.

The main theme of the site, "Survival in the wild nature" - is to be ready to be in the wild, and the ability to survive in extreme conditions.

The Survival in the wild nature - how correctly to behave, it having appeared in an emergency situation. Ability to find a way out from any situation: to kindle a fire, to put traps, to prepare food, to arrange dwelling and a lodging for the night; to learn to knit knots, to clear water, to be guided by districts, correctly to choose equipment, a knife. Also you can download directories to tourists, encyclopedias survivals, video Bear Grills to Survive at any cost (Man vs. Wild).