Scientists disappointing data sent by Rosetta – TVN Meteo

The study, which was published in the journal Science, they change the popular theory for the evolution of life on our planet. Until now, scientists have suspected that the water came to Earth from comets. The authors of recent studies conclude that a more likely source of life-giving liquid, however, the asteroid.

The probe belonging to the European Space Agency (ESA) confirmed the presence of water molecules on Churyumov-Gerasimenko 67P. But it turns out that the composition on a comet is different from that on Earth. Water has a higher concentration of molecules called. heavy water ( wherein a substantial portion of the hydrogen atoms of ²H isotope, deuterium).

On our planet, for every 10 thousand. water molecules fall three deuterium atoms. This water has the same physical properties as the H20, but it has more mass.

– This ratio of heavy and light water is very distinctive – explains Professor. Kathrin Altwegg at the University of Bern in Switzerland. – The amount of deuterium on a comet is several times greater than the amount of deuterium in the same number of water molecules on Earth, it means that this type of comet could not bring water to our planet – the professor added.

Rosetta Mission

Rosetta mission began in March 2004. Scientists want to gather much information about

comet. Space probe launched in pursuit of a speeding 56 thousand. km / h celestial body. Rosetta dispersed by means of gravity passing planets.

Landing with hits

The landing was 10 years and five months after the start of the Rosetta from Earth. There were, however, without problems. Philae lander settled down in a shady spot, where the light does not reach the solar panels to power the machine. Just enough power to tens of hours. At this time managed to Rosettcie collect preliminary data and retrieve the first soil sample.

Now the probe is dormant. The work at full capacity can start after a few months.

Place the machine on a comet is the first event of its kind in history. Philae landed at 67P / Churyumov-Gerasimenko in 12.11.