Ice, space lasers, penguins and a workhorse rocket’s last liftoff – it’s the stuff great tweets are made of.

NASA is inviting social media users to apply for credentials to attend the launch of the agency’s Ice, Cloud and Land Elevation Satellite-2, or ICESat-2, aboard United Launch Alliance’s Delta II rocket. Launch from Vandenberg Airforce Base near Lompoc, California is targeted for no earlier than Sept. 12.