06 Sep '11, 6am

Report: 'Space Junk' Accumulation Is Past 'Tipping Point',... - PlanetSave.com

Report: 'Space Junk' Accumulation Is Past 'Tipping Point',... - PlanetSave.com

A large percentage of the space debris is found in LEO (low Earth orbit), which is defined, roughly, as between 200 and 2000 kilometers (between 124 miles to 1260 miles). But a fair percentage of older debris (from lunar missions, e.g.) occupies altitude bands much further out into space, with some coming within reach of GEO (geosynchronous/stationary orbiting) satellites. This higher altitude junk is far less affected by atmospheric drag and thus takes much longer to decay from its orbit. It is also traveling at slower average velocity (around 1.5 km per second) than LEO debris which means the debris field from any collision will not be as severe as would occur in LEO. But these micro-satellites can still take out a human-built satellite (like one of NASA’s Earth monitoring observatories) in short order. Most of this high-altitude junk will be in orbit for at least the ne...

Full article: http://planetsave.com/2011/09/06/report-space-junk-accumu...

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Post from the Past: Playgroups

Post from the Past: Playgroups

karencheng.com.au 15 Sep '11, 3pm

This post was written in November 2003, when my first child was 8 months old. Back then, going to a mother’s group (or pla...

EastCoastLife on Talking Point

EastCoastLife on Talking Point

eastcoastlife.blogspot.com 10 Sep '11, 11am

Presenter Melissa Hyak with invited guests I was surprised when the producer of Talking Point invited me to participate on...

Bike Sharing is a Tipping Point to Bicycling to the Suburbs

Bike Sharing is a Tipping Point to Bicycling to...

triplepundit.com 09 Sep '11, 8am

While such temporary solutions are heartening, it’s indicative that more needs to be done to accommodate people’s burgeoni...