How to Use Your Camera to Calculate the Speed of Earth’s Spin

Earth is spinning… and fast! It was during my first nights in astrophotography that it became very concrete for me. By taking pictures of the stars, one quickly obtains a change of star physiognomy that confirms the rotation of the earth. In this article, I describe how to use this phenomenon to measure the rotational […]

Click here to read the rest of the article

Leave a Reply