Category Archives: Exploration

Distant Retrograde Orbit

John F. Lindner December 8, 2022 6:16 PM

The Artemis 1 mission’s Orion spacecraft has successfully entered and exited a distant retrograde orbit about Moon. DRO is a stable and easily accessible orbit requiring a low velocity change . In DRO, Earth‘s non-negligible gravity contributes to a 3-body problem that … Continue reading →

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More on Amsterdam!

Susan Lehman May 4, 2017 4:05 PM

As promised, I’m posting a bit more about my trip to Amsterdam and the Netherlands in general.  I was able to work a little sight-seeing in during the working part of my visit.  And, I was able to time my visit … Continue reading →

Posted in Adventure, Exploration, Travel | Leave a comment