A medium in space claimed akin to a fish water friction example?
Karl Hase
1

“you are clueless.”

Please read Lincoln Barnett’s book ‘The Universe and Dr.Einstein’, London, 1949, Foreword by Albert Einstein himself, page 78. Or read my comment on link;

https://theconversation.com/can-we-ditch-dark-energy-by-better-understanding-general-relativity-76777#comment_1343709

Who is really clueless, you and they/your real text book, or me; because for more than 100 years do not understand that they had studied and accepted theories taught by someone who has no ideas on the basic of astronomy?