Space dust hit in an ESA space probe 40,000 km / h, but this is a good thing – CNET

Space dust hit in an ESA space probe 40,000 km / h, but this is a good thing – CNET

micro meteroid impact, the LISA Pathfinder spacecraft beat 54 times in over 4,000 hours of travel.


NASA’s Goddard Space Flight Center

search in the endless dark space, it is easy to think of the solar system as a void of nothing. But in the inner solar system micro meteroids, tiny speck of space dust invisible to the human eye, fly around the earth at speeds of over 40,000 km / h. This poses a potential danger for space vehicles, we have declined in the orbit for the measurement of the cosmos. But how big could be a problem with the microscopic dust?

researchers at NASA and the European space Agency (ESA) wanted to find. With the Laser Interferometer Space Antenna (LISA) Pathfinder, or LPF, which operated in orbit, the test between January 2016 and July 2017, the team conducted a survey of the possible to how often your space ship was slammed by the space dust.

The research, published in the journal Astrophysical Journal in September, details 54 collisions with the LPF spacecraft. The mission was essentially a tech demo — the equipment, the LPF can be used, in fully functional LISA Observatory. The core tasks of the LPF was to show the technology on Board could be used for a full-fledged mission in the future. However, before starting, researchers realized that the space ship is clearly could sensitive instruments used to detect very small effects.

This is because every time LPF is taken, small engines, it helps correct of course. The examination of this small rate is shown corrections, what hit it, and with how much force. The researchers had access to 4,348 hours, LPF data pore, and built an extensive set of data micro-meteroid collision with the spacecraft.

Then, the modeling of the impact on the LPF, the researchers were able to where the micro meteroids have their origin. Previous studies of the area, the dust in this region of the solar system has shown, much of it comes from short-period comets, such as 67P/Churyumov-Gerasimenko, whose orbits are controlled comets from the giant planet Jupiter (Jupiter-family). The “comet crumbs”, which collided with the LPF consistent with these studies, with the majority of the impact, the comet from the Jupiter family and a small contribution of comets for the period.

The ESA to start the development of the LPF in 2034, — a suite of three satellites in a triangle, astronomers activate arranged on the hunt for gravitational waves with as-yet-unseen precision. This study is a great blessing for astronomers extreme cosmological events such as black hole mergers from the other side of the universe, but LPF has shown that next-generation instruments will also be helpful for the implementation of experiments, much closer to home.

Released on Tue, 19 November 2019 04:48:33 +0000

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