On Aug. 13, 2014, a company called DigitalGlobe launched WorldView-3, what was then the sharpest-eyed satellite of all time.
Earth’s highest, coldest, rarest clouds are back. How to see the eerie ‘noctilucent clouds’ this summer.
Look North as the stars appear in June and July to have a chance of seeing rare noctilucent (or ‘night-shining’) clouds with the naked eye.