According to a study by European aerospace company Airbus, if space rocks threaten the earth, large satellites used for television broadcasting can be quickly and easily reused as asteroid deflectors.
This research is part of a mission concept called Fast KD (FastKD), commissioned by the European Space Agency (ESA) as part of its efforts to prepare for an end-of-the-world scenario that is certain to happen someday (Although it may happen that day) in the very distant future).

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telecom satellites in the so-called geostationary orbit at an altitude of 22,000 miles (36,000 kilometers) orbit the earth at a speed consistent with the rotation of the earth, so they appear to be permanently suspended over an area. These satellites are usually very large, like a small bus. Their weight can reach 4 to 6 tons, enough to affect the path approaching space rocks.
However, as Albert Falke, who heads the FastKD research at Airbus, told Space.com, it may take 10 such spacecraft to collide with a 300-meter-wide asteroid in a short time to completely change its trajectory avoids crash the planet.
Related: Potentially Hazardous Asteroids (Image)
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“Besides being big and heavy, these telecom platforms are also quite high frequency,” he said Falke. “This means that we can expect them to be readily available in the integrated facilities of [satellite manufacturers]. This is something we can take for granted.”
For example, according to SpaceNews, in 2019, global commercial satellite operators commissioned 15 geostationary satellites to be deployed.

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In the scenario explored by Airbus, if astronomers detect that an asteroid is colliding with the Earth, all satellite manufacturers in the world will have to start converting the telecom satellite they are currently building into an anti-asteroid arms. All these missions must be launched within about a month to reach the asteroids at roughly the same time. The combined effect of the
satellite colliding with the earth’s rocks can change its trajectory by only an inch or two, but if it is done long enough before the expected impact, this is enough to derail its orbit and prevent disaster.
“The bottleneck [for the successful execution of such missions] will be the rocket,” Falke said. “We think we can release 10-15 available versions globally in a month.”

By Peter

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