Wirex GOEX.pro
Wirex GOEX.pro

How to Watch the Perseid Meteor Shower

Tumblr 9-8-2018 Tumblr News 36
“Take 500 and divide it by the length in millimeters of your lens,” NASA officials wrote in a Tumblr post. “The resulting number is the length of time in seconds that you can keep your shutter open be...
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