August 15, 2021
On your birthday, photons that left distant stars before humans walked the Earth finally completed their journey. You began yours.
Perseid Rain
Birthday · August 15, 2021
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APOD published August 15, 2021. Credit: Luo Hongyang. A publication-date match, not a photo taken on your date. Independent of NASA.
Comet dust rained down on planet Earth last week, streaking through dark skies in the annual Perseid meteor shower. The featured picture is a composite of many images taken from the same location over the peak night of the Perseids. The umbrella was not needed as a shield from meteors, since they almost entirely evaporate high in the Earth's atmosphere. Many of the component images featured individual Perseids, while one image featured the foreground near Jiuquan City, Gansu Province, China. The stellar background includes the central band of our Milky Way Galaxy, appearing nearly vertical, as well as the planets Jupiter and Saturn on the left. Although the comet dust particles are traveling parallel to each other, the resulting shower meteors clearly seem to radiate from a single point on the sky -- the radiant in the eponymous constellation Perseus. The image captured so long an angular field that the curvature of the sky is visible in the trajectory of the Perseids. Notable APOD Image Submissions: Perseid Meteor Shower 2021
Image credit: Luo Hongyang