Posting 4 times daily.

Posting archive pictures from Wikimedia Commons Picture of the Day as seen at
https://commons.wikimedia.org/wiki/Commons:Picture_of_the_day

(Unofficial bot)

See also @cpod for a new picture each day.

Posting NASA's Astronomy Picture of the Day as seen at
https://apod.nasa.gov/apod/astropix.html

(Unofficial bot)

See also @apod_random for archival pictures, 4 per day.