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Hubble discovered a swarm “of comets kamikaze”

"Хаббл" обнаружил рой "комет-камикадзе"As show pictures from “Hubble”, these objects look and move like the Kreuz comets in the Solar system.

Orbital Observatory “Hubble” has received extraordinary pictures of the young star HD 172555 in the constellation the Peacock, which indicated the presence of a “swarm” of comets, moving in the direction of the light and periodically colliding with him.

“As show pictures from “Hubble”, these objects look and move like the Kreuz comets in the Solar system, periodically burning up when approaching the Sun. However, we do not know their composition, we cannot say that it is a comet. Need more observations in order to understand whether they are rocky celestial bodies like asteroids, or icy, like comets,” said Carol Grady (Carol Grady) from space flight Center name Goddard in Maryland (USA).

Grady and her colleagues made this discovery by observing, with tools like the Hubble and other NASA telescopes for the recently discovered stellar system HD 172555, which is considered one of the most unusual “neighbors” of the Sun is found by astronomers in recent years.

This star system, says Grady, is a baby by cosmic standards – she was born about 23 million years ago, and it has not yet completed the process of formation of planets and small celestial bodies. It is removed from the Earth just 95 light-years away, allowing scientists to study the smallest details of this newborn “star family.”

The main reason why HD 172555 is of interest to astronomers is the fact that in 2009 the telescope “Spitzer” found possible hints of the fact that recently in the vicinity of this star happened, “planetary accidents”. Two small Bud planets the size of mercury faced each other, with the result that one of them was destroyed, and the second is almost completely evaporated.

In addition to debris and clouds of hot gas that occurred after the collision of planets, scientists recently found around HD 172555 a large number of comets, finding traces not of star elements – calcium in its spectrum. This discovery led scientists from NASA to check whether there are these comets using the Hubble space telescope.

To do this, Grady and her colleagues analyzed the ultraviolet part of the spectrum of HD 172555, trying to find traces of the other “comet” elements and measure the speed of their carriers, focusing on the red shift of their lines. As it turned out, they do exist and are moving with very high speed of 580 kilometers per hour towards the star.

Scientists believe that both of these discoveries say that “Hubble” saw a cloud of gas, which replaced the torn and melted HD 172555 of a comet whose remains continue to move in the direction of the star.

It is not clear whether this object is analogous to comets Kreuz in so-called “sanatoriuma comet”, near the Sun at minimal distance and occasionally burning up in its atmosphere, or an asteroid which has been thrown in the direction of HD 172555 in the collision of nuclei of the planets.

Scientists will test both of these hypotheses through further observations, for what they try to find traces of hydrogen and oxygen in the spectrum of a shattered comet that would indicate or refute the presence of water in the comet or asteroid-“kamikaze”. If the existence of comets is confirmed, then scientists will try to find an invisible giant planet that needs to “conduct” their movement.

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