Astronomy Picture of the Day Archive 2015 [https://apod.nasa.gov/apod/archivepix.html] - 2023-07-23 21:04:05 - public:mzimmerm general, news, todo - 3 | id:1483658 -
How to understand Einstein's equation for general relativity - Bigthink [https://bigthink.com/surprising-science/einstein-general-theory-relativity-equation/] - 2021-09-15 22:04:18 - public:mzimmerm general, gravity, relativity - 3 | id:788370 -
