With apologies to Tim Finn and Split Enz for
borrowing stealing their title.
The ISS (you may remember it from posts infinatum on here) has sprung a leak.
[brief pause while I spill coffee all over my laptop]
[that wasn’t a good idea]
Look. We all have problems and they affect us all in different ways. There are levels here. My laptop may have just taken a hit of Nespresso to its power switch, but all the oxygen that I rely on for breathing isn’t disappearing into space.
Which is nice.
Apparently, the leak was likely caused by a MicroMeteoroid and Orbital Debris (MMOD) strike to one of the windows. A MicroMeteoroid is exactly what it sounds like: a very, very small meteoroid, but it was the Orbital Debris bit that got me interested.
Orbital Debris is also exactly what it sounds like. Debris in orbit around Earth. But what I didn’t realise was that it is often man-made. Yep. We’ve dumped shedloads 0f litter in space too. Great. Is there actually anywhere that we have f**ked up yet?
And MMOD strikes aren’t even unusual:
Although spacecraft are designed with a level of protection from such impacts, MMOD was the third biggest threat to losing an orbiter during her mission – second only to launch and re-entry.
During the Space Shuttle era, all of the orbiters would receive flesh wounds from MMOD strikes.
And because things in space generally go much faster than on earth, the damage is… well… here’s an example of what those MMOD strikes look like:
But it was this line that amazed me:
Atlantis and Endeavour both suffered “bullet hole” impacts to their radiators, with Atlantis’ damage was sustained when she was hit by a tiny piece of circuit board on orbit – likely from a destroyed satellite. The damage held no mission impact and was only noticed once she had returned home and was in post flight processing inside her Orbiter Processing Facility (OPF).
Of course, NASA did a whole risk-analysis, debriefing, scientific investigation technical report paper on the whole thing. During the investigation, they tried to recreate the incident (in a lab on earth) by firing a bit of circuit board at a space shuttle panel at 4.14km/sec (that’s about 15,000kph). The entry hole on the original space shuttle panel was 2.74mm in size. The fragment of circuit board was only 0.4mm long, but when it’s going that fast, even little stuff is going to hurt.
There’s no evidence that the ISS window strike was from a man-made object, but it’s a proven fact that we’re literally putting astronauts in danger by putting them in the firing line of plastic rubbish that we’ve put into space and which is now hitting the ISS and other spacecraft.