In today's image, we see our Sun imaged on January 4 which was the time of perihelion. Perihelion is the time in an orbit when an object (in this case, Earth) is closet to the Sun. While this is then we are closest to the Sun in our orbit, it has nothing to do with the changing seasons which are causes by the 23.5 degree tilt of Earth on its rotational axis.

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This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

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