A new aerospace startup founded by a former SpaceX engineer is developing satellites designed to survive atmospheric reentry and return to Earth with their payloads intact. The concept aims to extend satellite usefulness by allowing hardware to be upgraded or reused rather than discarded after several years in orbit.
The company, Lux Aeterna, was founded in 2024 by satellite engineer Brian Taylor, who previously worked on large satellite networks including SpaceX’s Starlink constellation and Amazon’s Project Kuiper program. Lux Aeterna recently raised $10 million in seed funding to support development of a reusable spacecraft platform designed to test the concept of satellites capable of controlled reentry, according to TechCrunch.
The funding will be used to build the company’s first spacecraft, known as Delphi. The mission is expected to launch aboard a SpaceX rocket in early 2027. During the demonstration flight, Delphi will carry hosted payloads and experimental materials into orbit before returning them safely to Earth. The spacecraft is planned to land at Australia’s Koonibba Test Range through a partnership with the aerospace launch provider Southern Launch.
Returning a spacecraft from orbit presents significant engineering challenges. Vehicles reentering Earth’s atmosphere travel at extremely high speeds, producing intense heat generated by atmospheric compression and friction. To survive these conditions, spacecraft require specialized heat shields and thermal protection systems that add structural weight and complexity.
Because additional mass increases launch costs, most satellites are designed as single use systems. After reaching the end of their operational life, satellites either burn up during atmospheric reentry or are moved into higher “graveyard” orbits to avoid interfering with active spacecraft.
Lux Aeterna’s approach integrates a heat shield directly into the satellite’s structural design, allowing the vehicle to withstand reentry without relying on a separate capsule. This architecture could allow satellites to deliver experimental materials back to Earth or return for refurbishment and upgrades before being launched again.
The concept reflects a broader effort in the space industry to apply reusability principles beyond rockets. Over the past decade, reusable launch vehicles have significantly reduced launch costs and increased mission frequency. Engineers are now exploring similar approaches for spacecraft operating in orbit.
Several companies are already testing related systems. Startups such as Varda Space Industries and Inversion Space are developing small reentry capsules that allow materials manufactured or tested in orbit to be returned to Earth. These capsules can transport scientific samples, specialized materials produced in microgravity, or other cargo requiring controlled reentry.
Reusable satellites could enable additional applications beyond sample return. Engineers envision using such systems for in orbit materials testing, microgravity manufacturing, pharmaceutical research, or the rapid transport of specialized components back to Earth. Defense agencies have also shown interest in technologies capable of delivering hardware from orbit to specific locations.
The concept could also address a long standing limitation of satellite infrastructure. Most satellites remain in service for only five to ten years before component degradation, fuel depletion, or technological obsolescence requires replacement. If satellites could return to Earth, operators could upgrade sensors, computing hardware, or imaging systems without building entirely new spacecraft.
However, economic feasibility remains uncertain. Reusable satellites would require additional structural mass, thermal protection systems, and refurbishment operations after landing. The cost of returning and relaunching spacecraft must remain lower than the cost of replacing them entirely for the model to be viable.
Regulatory frameworks also present challenges. Returning spacecraft must comply with safety rules governing reentry trajectories and landing zones to prevent risks to people or infrastructure on the ground. Current licensing processes remain complex, which has led some companies to conduct reentry operations outside the United States.
Industry observers say reusable satellite systems could represent the next major shift in orbital operations if engineering, regulatory, and economic factors align.