SpaceX scrubbed the planned 10th test flight of its Starship megarocket for the second day in a row today (Aug. 25), this time because of some uncooperative clouds.

In space, Starship will attempt to deploy mock Starlink satellites and reignite an engine along its suborbital path around the globe. Atmospheric reentry over the Indian Ocean will test its exterior steering flaps and an array of experimental heat shield tiles as the ship blazes through intense friction and heat.