{"type":"rich","version":"1.0","title":"Heather_860 wrote","author_name":"Heather_860 (npub147…6wu4v)","author_url":"https://yabu.me/npub147ekwzq0llxhnwj8kg8rd29d7gpskqv8d38ty08m9g9g0xkkmyjq86wu4v","provider_name":"njump","provider_url":"https://yabu.me","html":"Regarding experiments, I did one yesterday. I went out in my yard at 10 a.m. and recorded the relative position of the sun. Then I did the same 4 hours later. Guess what? Either my yard moved or the sun did, or maybe both. Motion can be measured  : - D "}