by Roger Balettie | Oct 7, 2013 | Space
There are a lot of reviews on the new movie “Gravity”, starring Sandra Bullock and George Clooney. A lot of them are gushing, a lot of them are solid, and a few of them are hyper-critical. This one isn’t really any of those… it’s an...
by Roger Balettie | Aug 19, 2013 | NASA, Space
Noctilucent Clouds and you A good friend recently posted this YouTube video on my FB page showing a rare video with *both* Noctilucent Clouds and the Aurora Borealis. Noctilucent Clouds (NLCs, also called Polar Mesospheric Clouds) are clouds made of extremely small...
by Roger Balettie | Aug 13, 2013 | NASA, Space
Orbital Velocity… and great analogies One of my favorite web-comics, xkcd, did an excellent piece titled “Orbital Speed”, in which they answered a few readers’ questions: t What if a spacecraft slowed down on re-entry to just a few miles per...
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