For the first time astronomers found a large amount of the pine forest, which salts could play a key role in emergence of RNA, which is the connection crucial for emergence of life in a meteorite from Mars. James Stephenson from Institute of astrobiology of NASA at the Hawaiian university in Manoa (USA) and his colleagues investigated the meteorite from Mars found in Antarctica during expedition of 2009-2010. Using an ionic microprobe, scientists analyzed clay streaks in a meteorite from Mars and found out that pine forest in it contains in quantity of 160 parts on one million. That is in eight times more, than in other known meteorites from Mars. Salts of pine forest could play an important role in life origin on Earth as they stabilize a ribose, the RNA important component which was “data carrier” before emergence of life. Molecules of RNA stored and transferred hereditary information between the first live organisms even before emergence of DNA. But thus RNA had to appear during chemical evolution in the lifeless nature.
Before emergence of modern forms of the life, there were a number of the organisms, managing one RNA. But what is the source of phosphorus necessary for creation of the very first organic molecules? Now phosphorus meets in environment generally in the form of almost insoluble connections, to take from which this element of life is quite problematic. Meanwhile the analysis of samples of limestone showed that 3,5 billion years ago phosphorus was present on Earth. Scientists assumed that meteorites could be source of phosphorus. Meteorites could bring phosphorus in structure of schreibersite (phosphide of iron and nickel). Schreibersite at hit in water formed soluble and chemically active phosphites – salts of phosphorous acid.
The Moon had a new crater on a surface thanks to a meteorite, which crashed into it in March, having arranged the largest explosion recorded by scientists from the moment of the beginning of its monitoring. The meteorite fell on March 17, having crashed into a lunar surface at a stunning speed of 56 000 miles/h (90 000 km/h) and having created a new crater of 65 foots in width (20 meters). Accident was accompanied by bright flash of light, which would be visible to any even with an unaided look. On March 17, the object of the size of a small boulder got to a lunar surface. It exploded in a flash, flash was nearly 10 times brightest which the scientists observed.
By the word of scientists, the coming nearer comet, which can quite appear “A comet of a century”, can create an unusual type of a meteor shower. When the comet of ISON 2013 will fly by Earth this year, it is quite possible that the dust from a tail of a comet will create a meteoric stream. In that moment to the atmosphere of a planet will get a stream of the smallest particles, which once were part of a tail of a comet. According to the Paul Veygert instead of combustion in light flash, they will softly drift down to the Earth. By the Veygert’s computer model motes will travel with a speed of 125 000 miles/h (201 168 km/h) but as soon as they will get to Earth atmosphere, will be slowed down before total loss of speed. Because of it, observers on the Earth won’t be able to see meteors as they fall through the atmosphere in January 2014, the scientist added. The invisible meteor shower of a comet dust, if it really occurs, will be very slow. It can take months or even years for the fine dust settling from an upper atmosphere. But the hope of brilliant show can’t be lost.
The meteorites, which brought with itself the molecules, allowed to reserve energy could become batteries for the first organisms on Earth. Each organism has such built-in batteries, after all the energy received with food, not always is required at once and completely. At the heart of such organisms is phosphorus, but early forms of life had to it no access, because this element was hidden deeply in minerals. The stones pouring from the sky helped to solve a problem. According to Terry Ki from Great Britain University, the first source of energy could be pyrophosphite, consisting of phosphorus, oxygen and hydrogen. This substance is similar on the chemical properties to ATF and thus more reactive, that is enzymes aren’t necessary to it. Ki and his colleagues studied one Siberian meteorite, which has a phosphorus source. Fragments of a heavenly stone dipped into acidic water from volcanic ponds of Iceland, which is considered analog of the water existing on primitive Earth. Four days later samples of a meteorite allocated a large amount of phosphite. Having dried, it turned in pyrophosphite. As we see, this substance is formed very simply. Unfortunately conclusions caused an ambiguous assessment. The biggest problem is that all modern organisms use for energy accumulation by source of phosphate, instead of phosphites.
As a result of the fall of fragments of the meteorite in the Chelyabinsk region,the number of victims has increased up to 1,2 thousand people. Meteor rain over the Ural mountains took place in the morning on Friday. One of the meteorite exploded over the Chelyabinsk region. The blast wave damaged buildings in the capital region and other localities. Material damage from the fall of the meteorite exceed, according to preliminary estimates, about one billion rubles.
A family Thomassens in Oslo got a surprise when they visited their allotment garden cabin for the first time this season and found that a 585-gram (20 oz.) meteorite had ripped a hole through the roof. The space rock was discovered lying five or six metres away. Astrophysicist Knut Jorgen Roed Odegaard from the University of Oslo investigated the report and found it to be genuine meteorite. He told that we can tell immediately that it’s genuine from the burned crust, and we can also recognize it from how rough and unusual it is.
The Japanese asteroid probe Hayabusa succeeded in returning more than 1,500 grains of dust from the asteroid 25143 Itokawa when it parachuted into the Australian outback in June 2010. Already, the samples from this 1,800 foot-long (550 meter) rubble pile have helped solve the longstanding mystery of where most meteorites striking our planet come from. To uncover still more details about asteroids, scientists analyzed the size, mineralogy, shape and geochemistry of five dust grains recovered by Hayabusa.
A meteorite that fell from space some 30,000 years ago is likely Britain’s largest space rock. And after much sleuthing, researchers think they know where it came from and how it survived so long without weathering away. According to Colin Pillinger, a professor of planetary sciences at the Open University rthe giant rock, spanning about 1.6 feet (0.5 meters) across and weighing 205 pounds (93 kilograms), was likely discovered by an archaeologist about 200 years ago at a burial site created by the Druids (an ancient Celtic priesthood) near Stonehenge.