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Traces of a collision of two super-Earths discovered

02.02.2019

Scientists have discovered traces of an interplanetary cataclysm outside the solar system for the first time. The discovery was made during observations of Kepler 107, a sun-like star located at a distance of 2 light years.

Four exoplanets revolve around this star. Astronomers drew attention to the unusual properties of the second and third of them - respectively, Kepler 107b and Kepler 107c. They are about the same size, each one and a half times the size of the Earth. But the mass is noticeably different. Kepler 107c turned out to be twice as heavy as its neighbor. This indicates the presence of a large, iron-rich core, according to Nature Astronomy.

The current theory says that the most massive planets are located near the star, since their particles are less scattered than light hydrogen and helium. But Kepler 107c is farther from the center than its "lightweight" neighbor.

Scientists have considered several theories to explain this fact, including the migration of the planet. The most likely recognized "space accident." Millions of years ago, two bodies, each about ten times the size of Earth, collided near a star. They were saturated with iron, and their collision could give rise to a new planet, which consisted of 70% of this element. The remains of the rocks, obviously, evaporated during the explosion.

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WRK SSDs from Angelbird 21.08.2014

Angelbird, an Austrian flash storage manufacturer, has unveiled its entry-level SSD WRK series solid state storage devices.

The drives are made using MLC NAND flash memory (multilevel cells) and an SMI 2246EN controller. The interface for connecting to a computer is Serial ATA 3.1 with a bandwidth of up to 6 Gb / s.

SSD WRK series devices are available in capacities of 128, 256 and 512 GB. The steady read speed reaches 563 MB / s, the write speed is 450 MB / s. The maximum IOPS (input/output operations per second) is 72K; access time does not exceed 0,1 ms.

The manufacturer claims that standby power consumption is only 0,25 watts, and the maximum power consumption is about 3 watts. The median claimed time between failures (MTBF) is 2 million hours.

You can buy drives at an estimated price of 100, 160 and 300 US dollars for modifications with a capacity of 128, 256 and 512 GB, respectively.

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