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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

Harvest Moon Trail

Explanation: Famed in festival, story, and song the best known full moon is the Harvest Moon . For northern hemisphere dwellers that's a traditional name of the full moon nearest the September equinox. Seen from Saunderstown , Rhode Island, planet Earth, this Harvest Moon left a broad streak of warm hues as it rose through a twilight sky over the Newport Bridge. On September 20 its trail was captured in a single 22 minute exposure using a dense filter and a digital camera. Only two days later the September equinox marked a change of season and the beginning of autumn in the north. In fact, recognizing a season as the time between solstice and equinox , this Harvest Moon was the fourth full moon of the season , coming just before the astronomical end of northern summer.

Date September 23, 2021
Credit Image Credit & Copyright: Mike Cohea
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.