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Distant Retrograde Orbit
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 makes the inertial space orbit non-Keplerian: an ellipse centered — not focussed — on Earth.…
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More on Amsterdam!
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 with my children’s spring break, so my family were able to come and join me…
Category: Exploration
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Nice post, John! Thanks for writing these. I always enjoy them.
David Smith’s ein stein is an awesome shape!
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Thanks, Mark! I enjoy reading your posts as well.