https://www.vice.com/en_us/article/7kvybz/internet-sleuths-find-hidden-message-in-spacex-space-tourism-photo

The first all-civilian spaceflight, called Inspiration-4, is due to launch this week for a three-day trip in Earth orbit onboard SpaceX’s Resilience vehicle. On Monday, SpaceX and the mission crew tossed space enthusiasts a delightful hidden message that resonates with the pioneering nature of the voyage.

A crew portrait that SpaceX tweeted out on Monday looks unassuming at first glance, but internet sleuths at the subreddit r/SpaceXLounge quickly recognized an Easter egg written in Morse code in the background, reports Futurism. The cryptic note reads “Ad astra,” a Latin phrase meaning “to the stars,” which is often invoked as an inspirational incantation for space exploration.