-
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.…
-
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
Recent Comments
Nice post, John! Thanks for writing these. I always enjoy them.
David Smith’s ein stein is an awesome shape!
Recent Posts
- Sabbatical trip to Europe – Part 3 (Otto Rössler)
- Sabbatical trip to Europe – Part 2 (Switzerland)
- Sabbatical trip to Europe – Part 1 (Lviv, Ukraine)
- The Longest Flight
- Where Are the Stars?
Categories
- Adventure (23)
- Architecture (6)
- Astronomy (25)
- Exploration (2)
- Fun (9)
- Mathematics (23)
- Miscellaneous (4)
- Outreach (5)
- Physics (117)
- Space Exploration (47)
- Students (45)
- Travel (0)
- Uncategorized (16)
- Wooster (35)
Thanks, Mark! I enjoy reading your posts as well.