Thedus: Mining Planet And Nostromo Last Port
Thedus was a Frontier mining planet in the Epsilon Reticuli system and the last port of the USCSS Nostromo before that tug was pulled off course to LV-426. Weyland-Yutani had mined it for more than a century and ran a drydock on the surface. In 2109 Captain A.J. Dallas lost the troop carrier UAS Archangel there after a miners' revolt, and two days before the Nostromo left the Company swapped science officer Umbulu for Ash.
Location And Setting
Thedus sat in Epsilon Reticuli, outside the Outer Rim on the Far Reach of the American Arm. Free League's Alien roleplaying game listed it with LNB-14 on the printed star chart and marked three colonies on the world. Mining and shipping hubs like Thedus and the Solomons sat under United Americas protection, and ships were told to cross the uncharted lanes between those hubs at FTL speed. Much of the ore leaving the far Frontier went through Thedus or Anchorpoint Station before it reached the Outer Veil and the Core Systems.
The listed affiliation was Weyland-Yutani, the Three World Empire, and the United Americas. Company offices sat in Tokyo, London, San Francisco, the Sea of Tranquility, and on Thedus, with another desk in Alexandria in the Independent Core System Colonies. Philippa Ballantine's Alien: Seventh Circle treated Thedus as Three World Empire space, far enough from Guelph Station that Combine Extraktors had no authority there.
Surface And Conditions
Surveyors first took Thedus for a small gas giant because the air was thick and cloudy, then found a large terrestrial rock with heavy metal deposits. By the 2180s the terraformed atmosphere was cold and thin, listed at 8 °C, over mountains, canyons, and the gouges left by a century of strip mining.
A severe environmental accident in 2109 made parts of the planet uninhabitable for many decades. Renewed terraforming had repaired much of that damage by the 2180s, but the air remained cold. In Keith R.A. DeCandido's Isolation novel, loader Stefano Vanini had spent his working life in Italia and on Thedus. He had seen all of Thedus he could reach and called it a rock next to Earth.
Mining And Colonies
Weyland-Yutani had mined Thedus for more than a hundred years by the 2180s. The ores listed for the world were yttrium, niobium, helium-3, and other rare earth metals, and those mines fed the long commercial tows toward Earth, including the mile-long refinery the Nostromo later pulled off the docks. The harbour-master at Drydock Bravo cleared that tug's flight plan in the hidden Alien Legacy crew file.
The RPG gave three colonies and a population of about 2,000,000. Leading Edge's earlier Aliens Adventure Game described three communities, each built around a reactor that also powered an atmosphere processor. In that 1991 account Thedus was a small domed colony on the long run from the ICC core toward the frontier world Pandora. The air was thin and held little oxygen, the settlement was not self-sufficient, and a shortage of power limited how far the towns could grow.
The Adventure Game colony lived on ship service and maintenance, and on the crews of vessels being worked on. It had a full space service base, while food, air, and other supplies ran short. The crime rate was very high, and many travelers who came in never left. The printed star map marked the world as Garrison Ventix CP 1 Thedus, a service stop on the road out to Pandora.
Labor Revolt And The Archangel
The J'Har revolt on Torin Prime spread to other colonies as the United Americas was forming. Advisors from that insurgency pushed a massive labor dispute on Thedus to break military supply lines to Torin Prime. Free League's Colonial Marines Operations Manual dated the Thedus dispute at four months, while the fight to take Torin Prime back ran nearly two years.
The troop carrier UAS Archangel was then sent to Thedus to keep the peace after that miners' revolt and the 2109 environmental accident. Classified events after that landing ended with the hull coming down on one of the planet's atmospheric processors, and more than 15,000 military and civilian people were killed. The Legacy file dated the loss to 25 December 2109, counted 15,293 dead, and marked the ship unsalvageable.
The United Americas blamed command error, and Captain A. Dallas lost his flight licence and took a dishonorable discharge on 3 January 2110, with no criminal charges. The RPG timeline treated that wreck, together with the Torin Prime war, as one of the shocks that pushed China and Russia into the Union of Progressive Peoples. The Colonial Marines later received expansion money that had been meant for the Rim fleet.
The Nostromo Haul
The commercial towing vehicle Nostromo took a contract to bring cargo back from Thedus to Earth. Ellen Ripley described that run to her daughter as about two years of work: a month out to Neptune to meet the hauler, eight months of sleep to Thedus, a month to load, and thirteen months home with a heavier refinery. The Legacy flight plan listed departure from Thedus at 12 June 2121, 0600 local, with a scheduled stop at Acheron on 1 April 2122 and Earth arrival left open. In the Isolation novel the cargo load finished on time, and Ripley ran the dock work.
Stefano Vanini later remembered Dallas, Ripley, and Lambert as good people when Amanda Ripley asked about the crew. He found Kane hard to like and did not care for Ash. On the last night Chiro Nagashima opened sake for the dock crew, and Ripley drank little, then walked Dallas back to his cabin after he drank far more. Amanda later compared a Thedus cargo-crew manifest from 2122 with a later list and found three names that had left that dock: Vanini, who went back to Earth, Nagashima, who transferred to Tanburro Station, and Aparna Bhatnagar, who had died.
The second Starcub shuttle on the tug, the Salmacis, was damaged in a docking accident before the Nostromo left Thedus and was not aboard for the run home. Only the Narcissus remained as a lifeboat. Later ICC safety rules forbade a ship from leaving port without a full set of auxiliary vehicles or EEVs. Mother then woke the seven-person crew on the haul back from Thedus and parked them over the LV-426 signal instead of finishing the transit to Earth.
The Science Officer Swap
Dallas had shipped five hauls, long and short, with another science officer and expected the same man back. Two days before they left Thedus, the Company replaced him with Ash and gave Dallas no other reason. Alien and Alan Dean Foster's novelization both put that swap on the Thedus dock. Michael Jan Friedman's Original Sin later named the missing officer Umbulu, who vanished after leaving Dallas a note that something had come up.
The Legacy file dated Ash's assignment to 10 June 2121, two days before the listed Thedus departure. Christopher Golden's River of Pain treated Ash as a man the Company forced onto the crew at Thedus, and Ripley disliked him from that moment. Dallas treated Ash as an ordinary Company science officer while the science work got done.
Later Traffic
Years after the Nostromo vanished, the Sol-Thedus flight path moved and traffic dried up at Sevastopol Station. Seegson later bought that freeport and tried to turn it into a Frontier hub, but the reroute had cut how many ships stopped there. Alien: Isolation placed that reroute among the reasons Sevastopol was failing before the flight recorder arrived. Amanda, hunting that recorder, had grown up thinking the Nostromo had gone only to Neptune and Thedus until Henry Marlow described the landing on LV-426.
On Guelph Station, Lenny Pope tried to put Mae Hendricks on the long-haul ship Icarus with coordinates for Thedus, Three World Empire space the Extraktors could not police. The Combine unit reached the dock before the hatch closed, so Mae never made that run and the Jackals never landed on Thedus.
Continuity Notes
The 1991 Aliens Adventure Game and the later Free League books do not describe the same scale of settlement. Leading Edge's Thedus was a thin-air dome town living off passing ships, with three reactor communities, a power shortage, and a high crime rate. Free League's Thedus was a two-million-person mining world, a company office site, and a major ore route off the Far Reach. Both give the planet three settlements and a poor atmosphere.
The Legacy flight plan had the Nostromo leave Thedus in June 2121 and reach Acheron in April 2122. The RPG timeline put the departure in 2122, the year the tug set down on LV-426 and was later destroyed. Isolation's cargo-crew paper used 2122 as the year on the Thedus dock manifest Amanda compared.
The Aliens inquiry sheet later shown on Gateway Station listed a security cruiser named U.S.C.S. Thedus among Lambert's earlier posts, with nine sub-light transits on that hull. That name belongs to a ship on a crew file, not to a second colony or a moon of the mining world.
Conclusion
Thedus was a Weyland-Yutani mining world in Epsilon Reticuli and the last port the Nostromo left for Earth. Dallas lost the Archangel there in 2109, and Ash came aboard two days before the tug departed.
Appearances
- Alien (1979, mentioned only)
- Alien (novel, Alan Dean Foster, 1979, mentioned only)
- Aliens Adventure Game (Leading Edge Games, 1991)
- Alien Legacy DVD crew files (1999)
- Aliens: Original Sin (2005, mentioned only)
- Alien: Isolation (2014, Sol-Thedus flight path)
- Alien: River of Pain (2014, mentioned only)
- Alien: Isolation (novel, Keith R.A. DeCandido, 2019)
- Alien: The Roleplaying Game (Free League, 2019)
- Alien: The Roleplaying Game — Colonial Marines Operations Manual (Free League, 2021)
- Alien: Seventh Circle (2025, mentioned only)
Tag Categories: Alien Universe Planets | Alien Universe Colonies | Alien Lore
