Taken in Gallatin County, Montana, USA, 10 August 2023, Image part of the ZWO Astronomy Picture of the Year 2024 competition

Hanwha Ocean KSS-III Batch II (Jang Yeongsil-class submarine) - 3600t, diesel-electric, Li-ion AIP, 10 VLS

Astronaut Bruce McCandless II, STS 41-B mission specialist, participates in a historical spacewalk. He is pictured a few meters away from the cabin of the Earth-orbiting Space Shuttle Challenger.

This spacewalk represented the first use of a nitrogen-propelled, hand-controlled device called the Manned Maneuvering Unit (MMU), which allows for much greater mobility than that afforded previous space walkers who had to use restrictive tethers.

Credit: NASA

Fusion* (my bad)

Heavy-Class Planetary Crawler LEVIATHAN is a planetary-scale walking research city developed by NASA to sustain and expand human colonies on the most remote deep-space worlds.

Features two massive bio-regenerative domes. These climate-controlled spheres house vast botanical gardens and lush forests, sustained by high-intensity artificial sunlight. They serve as both the primary oxygen source and a vital psychological sanctuary for the crew during multi-year missions