SCIENCE CAN BE FUN FOR ANYONE

xyzxyz 65533 gold badges1010 silver badges1515 bronze badges $endgroup$ 3 $begingroup$ Does one want to know each how the Earth-Sunlight length is calculated and how the velocity of light is measured? Those are wholly various things. As I requested ahead of, separate threads, you should. $endgroup$By clicking “Acknowledge All Cookies”, you comp