This was
your sky.
M27: Not a Comet
Charles Messier compiled a list of objects that were definitely not comets while hunting for them in the 18th century. Number 27 on his list, M27, is a planetary nebula, though it is not a planet. This gaseous emission nebula forms as a Sun-like star sheds its outer layers at the end of its life. It may appear round and planet-like through a small telescope.
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In tropical astrology, 20 AUG 2015 falls under Leo (♌). The sign's window runs from 07-23 through 08-22. Leo is anchored by Regulus, the heart of the Lion, twenty-four parsecs from Earth. The Sun was crossing this region of the sky on 20 AUG 2015.