In the universe of The Expanse TV series – a gripping political hard sci-fi drama set in the mid-24th century, where humanity has colonized the entire Solar System – Eros hosts Eros Station, one of the earliest and most bustling outposts in the Belt. It's a major hub for shipbuilding, repairs, and entertainment, with a population of around 100'000 people. The station is spun up to create artificial gravity through centrifugal force, with levels built so that "down" is toward the outer hull, providing about 0.3g – enough for comfortable walking but still a challenge for Inners unused to it.
Unlike the more industrial Ceres, Eros is known for its lower docking fees and vibrant underbelly, featuring casinos, brothels, and shooting galleries that attract crews looking to blow off steam after long hauls. It's described as the "birthplace of the Belt," where early colonists turned raw ore into the skeletons of the first spaceships, though over time, much of the heavy shipping shifted elsewhere. The docks are clustered in five main areas, with old shipyards jutting out like massive spiderwebs of steel and carbon lace, dotted with warning lights and sensors.
Eros plays a central and tragic role in the early story of The Expanse, particularly as the site of the infamous Eros Incident. Security on the station was initially handled by Protogen, but they pulled out and installed a puppet firm to oversee operations. This was all a setup for a massive experiment with the alien protomolecule, which was unleashed on the population as a weapon test, leading to horrifying mutations and the station's eventual takeover by the entity.
Here are some shots of Eros and Eros Station exteriors from the show:
Eros Station docks:
Environment concept artist 
Mars cycler is a specialized orbital trajectory designed to shuttle spacecraft between Earth and Mars on a regular, repeating schedule. First proposed by astronaut Buzz Aldrin in the mid-1980s, a cycler orbit intersects both planets’ paths repeatedly, allowing a dedicated transport vehicle - the "cycler" - to swing by Earth, pick up crew or cargo, then cruise through interplanetary space before encountering Mars again. Because the cycler itself never needs to slow down or perform large propulsive maneuvers to match planetary velocities, only small “taxi” vehicles are required to ferry astronauts between the cycler and each planet. This minimizes the delta‑V (fuel) requirements for the main habitat, making long-term habitation modules, radiation shelters, or artificial‑gravity setups more economical and sustainable across multiple missions.
From 2017 onward, SpaceX steadily refined their vision for the 1st human colony on Mars - from the debut of early visuals of an ambitious Mars City during the BFR (Big Falcon Rocket) unveiling, to increasingly detailed illustrations by 2019 showcasing the gleaming stainless‑steel Starship touching down and launching from this base. The 2022 update introduced animations emphasizing mission sequence - transports arriving, crewed modules landing, and a functioning spaceport. By April 2024, the concept had matured into a recognizable, modular Mars habitat design centered around a robust Starship fleet. Finally, in May 2025, the latest rendering unveiled a full-fledged Martian city with partially underground habitats to shield against radiation and Tesla Optimus robots constructing the city, marking the culmination of conceptual evolution from isolated landing pads to a thriving, self‑sustaining urban landscape on Mars.
On May 29th at Starbase, Texas SpaceX CEO and lead designer Elon Musk provided an update of SpaceX's 
