By Damien O’Connell
750,000. That’s the amount of space junk larger than 1 cm orbiting our planet. On average, these objects travel at 40,000 kilometers per hour, and when they hit other objects, like satellites, the result’s comparable to a grenade going off.
Outer space refuse has already given us some headaches. The Soviet Union’s Mir Space Station endured several impacts. In 1996 and 2009, debris destroyed active satellites. In 2013, space junk hit a Russian satellite, changing its spin rate and orbit. And just last year, suspected space debris struck the Copernicus Sentinel – 1A Satellite, but luckily caused only little damage.
So far, we’ve been lucky, but that luck may soon run out. As space junks continues to accumulate, we could face the Kessler Syndrome, a situation where space junk becomes so numerous as to destroy all active satellites. As of June 2016, 1,419 satellites currently orbit earth. What if these disappeared? The world would take a very, very hard hit, both in lives and treasure. Beyond this, debris could potentially destroy the International Space Station and even make it impossible for space vehicles to enter or exit the atmosphere.
We’ve got to act. We could try to destroy space junk, sure, but that may very well just create more, leading us, again, to a Kessler Syndrome scenario. So, here’s another thought: Why don’t we repurpose it?
Here’s one idea: Collect the stuff and use it as raw materials to build a colony on the moon. Just last year, leading scientists, to include prominent members of NASA, produced a special edition of New Space journal where they laid out ideas and plans for colonizing the moon. The ultimate purpose for such a colony would be to support missions to Mars. And all that space junk orbiting us? We could use it to build the foundations of this future lunar home.
So, how do we get there? For starters, the government should fund research into finding ways to collect and move space debris. Cooperation with industry likely holds the key to success here. Government incentives could possibly even lead to an entire space debris reclamation sector. Right now, there’s little money in collecting space junk, but with the Moon colony mission (and Mars) on the minds of many leading scientists at NASA, this could change with a few nudges from the government.
Let the race for the first galactic garbage man begin.