this is a logical round earth proof

until now the shape of the earth still cause controversy both among society and scientists. here I summarize that the earth is indeed round and can be proved in logic

• st round is neutral, we know that the moon, the sun and the planets of the planet are all round
• if the earth is flat, where is the edge of the earth ...?
• the occurrence day and night, if the earth is flat, can not possibly happen day and night process, try you to light a flat object with lights ...!

well ... that's what I can say, may be a benefit for all steemians and add science