A Feb. 22 Instagram post (direct link, archive link) claims a form of navigation that relies on celestial objects such as the sun, moon and stars proves the Earth is flat and stationary. "The Ancients ...

THIS is the sixth edition of an interesting little book, which explains briefly the principal facts relating to the motions of celestial bodies, and to the dimensions of those belonging to our own ...

Purpose: The purpose of this exercise is to illustrate the daily motions of stars/objects on the celestial sphere as seen from various locations on the Earth, specifically 1. the Earth's Poles, 2. the ...

THE author of this little book aims at showing that all motion is relative, and that the people who three hundred years ago disputed as to whether the earth moved round the sun or the sun round the ...