3.5 Ton Satellite to Crash Back to Earth 323
DeadBugs writes "CNN is reporting that the NASA Extreme Ultraviolet Explorer could crash back to earth in a matter of days. It's estimated that up to 9 large pieces (4-100 lbs.) of the Satellite could survive re-entry. Unlike the Compton Gamma Ray Observatory that was guided in, this Satellite will be uncontrolled. The EUVE has only been up there since 1992.... I wonder when this sort of thing will start to be a more common event."
Warning. (Score:5, Insightful)
NASA's original press release [nasa.gov] was on the 16th Feb.
Even that is a bit worrying. Did NASA only discover 11 days ago that their 3.5 tonne satellite was going to crash? It's not like they behave erratically, is it?
Re:Food for thought (Score:5, Insightful)
Re:Considering there are 7000 objects in orbit (Score:3, Insightful)
Actually it may not by as great a risk as you suppose.
Exactly why it's good to be selling insurance, not buying insurance.
Blowing things up just means more pieces (Score:5, Insightful)
As afidel wrote above (I'd mod him up if I had any points now), you don't want to do this to a defunct satellite.
As you point out, it would have to pose no danger to other spacecraft. Well, the only practical way to do that is to ditch it in a controlled fashion. Any explosion involves a release of energy in pretty much all directions. Although some shaping of the charge can control the blast, you still blast some pieces in every direction. Each piece that does not hit the atmosphere enters its own orbit - risking collision with some other satellite.
The proper solution, employed by almost all responsible satellite designers, is to allow enough extra fuel to deorbit the satellite. Of course, this depends on having CONTROL of the satellite. To guarantee this requires more redundancy - and more weight and fuel and complexity, etc. At the tens or hundreds of thousands of dollars a pound for launch costs, the designers usually opt for mission-suitable redundancy, and hope (and pray) that all the systems don't fail before they DO deorbit. And if they do start failing unusually fast, they'll deorbit early to avoid this kind of fiasco.
Kind of ironic - I've seen some griping on
You can't have it both ways, folks!
A little background information (Score:1, Insightful)