2023 September 23 - Afternoon Analemma

In today's image, we see an analemma in the sky. This is an image created by taking a phot of the Sun at exactly the same time each day for the course of an entire day over the course of a year. The pattern is caused by the tilt of Earth's orbit and the eccentricity (how much it deviates from a perfect circle) of the orbit.

This YouTube channel is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: https://apod.nasa.gov/apod/ap230923.html.

I also provide lecture videos to accompany the free OpenStax Astronomy textbook (https://openstax.org/details/books/as...) on another channel. They are avilable here:    • OpenStax Video Lectures   or through this channel:    / @introductiontoastronomy  

Note: All commentary is created by me and is not necessarily approved or sanctioned by APOD or NASA.