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Jeff Bryant
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![Solar System Diagrams][1] &[Wolfram Notebook][2] [Original]: https://www.wolframcloud.com/obj/jeffb/Published/JupiterSaturnConjunction2020-6.nb [1]:...
Hi Per, its likely there is no way to answer your question generally. All I can state is that Wolfram gets its TLE data from USSTRATCOM (US Department of Defense) via www.space-track.org that has its own radar tracking stations. Where those are...
&[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/cf70227c-9327-43a4-b99a-2682df626bb4
Never mind. I made a mistake in how I downloaded the file.
The data in Alpha was obtained from a previous iteration of the NASA site around 2009. Back then, the algorithms used to compute solar/lunar phenomena were likely based on JPL DE 405/406 ephemeris. Since then, they have likely updated to use the JPL...
I've just submitted a 3D modeling approach to the SARS-CoV-2 virus here: https://community.wolfram.com/groups/-/m/t/1989540
*MODERATOR NOTE: coronavirus resources & updates:* https://wolfr.am/coronavirus ---------- &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/5e511e56-ff8f-46c0-8990-fc63e37d232f
For what its worth, the USGS website keeps going down and coming back up: https://astrogeology.usgs.gov/search/map/Moon/Geology/Unified_Geologic_Map_of_the_Moon_GIS So, if it doesn't come up for you, try again later. It was working fine when I...
I have to say I have never done serious research on the Yellowstone system, not being a geologist by training, just an enthusiast. I found the following article interesting: ...
&[embedded notebook][1] [1]: https://www.wolframcloud.com/obj/jeffb/Published/CoalAgeRank4.nb