Space is getting crowded.
In addition to the thousands of satellites already orbiting Earth, about 14,000 new satellites are expected to be launched by the end of the decade.
That translates into about 9,000 tons of space debris, says Igal Kronhaus, former Technion professor-turned-space-tech startup entrepreneur.
It’s gotten so bad that the United States issued new regulations in 2022 that “won’t allow the launch of a satellite unless it has a convincing capability to move out of the way after five years from the end of the mission,” Kronhaus says.
Kronhaus started his company, Space Plasmatics, in 2021 to address the space junk problem while also improving satellite propulsion in general.
Space Plasmatics is developing plasma thrusters designed to navigate satellites to a different orbit or even back to Earth, using ionized gas in an electric field rather than the traditional propulsion method of chemical reactions.
The thrusters get their power from solar cells that are already mounted on the satellites. Solar-powered electric propulsion is now used in almost every satellite. High-powered versions could even propel manned spacecraft for missions to the Moon and Mars.
Electric propulsion was originally conceived in the 1950s as a way to get people to Mars – long before Elon Musk popularized the concept for the 21st century.
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