Analemma Tower: The Skyscraper Suspended from Space by an Asteroid

Analemma Tower is a speculative architectural concept proposed by New York-based Clouds Architecture Office in 2017. Rather than rising from a foundation on the ground, this structure would hang downward from an asteroid repositioned into geosynchronous orbit approximately 50,000 kilometers above Earth. Suspended by a high-strength cable system, the tower would trace a daily figure-eight path across the sky, making it the world’s tallest structure ever conceived and one of the most radical thought experiments in architectural history.

What Is Analemma Tower?

Analemma Tower is a speculative, mixed-use skyscraper concept that inverts the conventional logic of tall building construction. Where every skyscraper ever built pushes upward from a foundation fixed to the ground, the Analemma design removes the foundation entirely and replaces it with a space-based anchoring system. The structure would hang freely in the sky, tethered to an orbiting asteroid rather than to the Earth’s surface.

The project was conceived by Clouds Architecture Office, a New York-based interdisciplinary design firm led by Ostap Rudakevych and Masayuki Sono. The same studio had previously won a NASA competition to design a 3D-printed ice habitat on Mars and developed concepts for a space elevator, placing Analemma within a broader body of work exploring architecture at the intersection of extreme environments and orbital mechanics.

The name itself is precise, not decorative. An analemma is the figure-eight pattern that the sun appears to trace in the sky when photographed from the same spot at the same time each day throughout a year. The tower’s orbit would replicate this pattern exactly, moving between the northern and southern hemispheres on a predictable daily loop.

How Would the Analemma Tower Work?

The entire structural logic of the Analemma Tower concept rests on a system Clouds Architecture Office calls the Universal Orbital Support System (UOSS). This system draws directly from the theoretical principles of a conventional space elevator, a concept that has circulated in aerospace engineering for decades but remains unbuilt due to material limitations.

The UOSS proposal works in the following sequence. A large asteroid would first be captured and repositioned into an eccentric geosynchronous orbit above the Earth. From this anchor point, located approximately 50,000 kilometers above the surface, a high-tensile cable would be lowered toward the ground. The tower itself would be attached to this cable and hang suspended in the atmosphere, its lowest floors potentially reaching down toward regions of high topography where surface transfer could occur.

Because the asteroid would be in geosynchronous orbit, meaning its orbital period matches Earth’s rotation, the tower would appear largely stationary from the ground. In practice, its eccentric orbit would cause it to trace a slow figure-eight pattern, moving at varying speeds across the sky. The design takes advantage of this variation: as the tower slows near the top and bottom of its path, those points become practical locations for surface access. One such deceleration point is proposed to occur directly above New York City, where residents could theoretically disembark via parachute or transfer pods.

For more on how structural systems have evolved in supertall buildings, the Shanghai Tower article on this site examines one of the most engineered real-world examples of vertical structural innovation.

Analemma Tower Height and Scale

The proposed height of Analemma Tower would place it in a category that has no precedent in architectural history. The structure would extend approximately 32 kilometers into the atmosphere from its lowest accessible point, with the supporting cable reaching up to 50,000 kilometers to the asteroid anchor above. For context, the Burj Khalifa, currently the world’s tallest completed building, stands at 828 meters. The Analemma Tower concept is more than 38 times that height even at its lower end.

At 32,000 meters altitude, conditions become extreme in ways that exceed anything current architecture addresses. The atmosphere thins to near-vacuum levels, temperatures drop to around -40°C, and solar radiation increases significantly due to the reduced atmospheric shielding. The designers acknowledged these challenges explicitly, noting that at such elevations residents would need pressurized environments and protective gear to go outside, comparable to conditions on the International Space Station rather than in a conventional high-rise.

One notable design consequence of this height is the effect on daylight. At the tower’s uppermost levels, residents would receive approximately 40 extra minutes of sunlight each day compared to ground level, a result of the Earth’s curvature exposing those elevations to sunlight before and after the horizon blocks it below. This is one of the few measurable advantages the concept offers over ground-based living, though it comes paired with the near-impossible habitability conditions at that altitude.

Is the Analemma Tower in Dubai?

The Analemma Tower proposal identifies Dubai as its intended construction site, but the connection to Dubai is more pragmatic than symbolic. According to Clouds Architecture Office, construction costs in Dubai run at approximately one-fifth of equivalent costs in New York City. Since the tower would need to be assembled in one location and then transported into alignment with its asteroid anchor, the architects argued that Dubai’s combination of vertical construction expertise and lower cost per square foot makes it the logical starting point.

Beyond cost, Dubai has spent the past two decades building some of the world’s most ambitious supertall structures, including the Burj Khalifa and the planned Burj Binghatti Jacob, making it the city with arguably the deepest institutional knowledge of extreme vertical construction. The proposal does not suggest Dubai as a permanent location. Once the tower achieves its orbital alignment, it would follow its figure-eight path across the Western Hemisphere, passing over New York City, Havana, and Panama City during each 24-hour cycle before returning to the same orbital position.

For a broader look at how real supertall projects push the boundaries of structural engineering, the tallest skyscrapers in the United States feature covers several buildings that hold world records of their own.

What Are the Challenges of Building Analemma Tower?

Analemma Tower is explicitly described by its designers as a speculative proposal, not a construction-ready blueprint. The engineering challenges that stand between the concept and physical reality are substantial enough that no timeline for construction has ever been proposed.

The first challenge is asteroid capture and orbital positioning. While space agencies including NASA and the European Space Agency have explored asteroid rendezvous missions, placing and maintaining a large asteroid in a precise geosynchronous orbit for the decades required to support a permanent structure is beyond anything currently possible. The ESA’s Rosetta mission in 2015 demonstrated that landing on a comet is achievable, and NASA has explored asteroid redirect concepts, but these are far removed from the controlled orbital insertion that UOSS would require.

The second challenge is the tethering cable itself. A cable capable of suspending a large mixed-use structure from 50,000 kilometers above the Earth would need to be extraordinarily strong and lightweight simultaneously. Current materials, including advanced high-tensile steel and fiber composites, fall far short of the strength-to-weight ratio required. Theoretical proposals for such cables often cite carbon nanotubes as a candidate material, but manufacturing carbon nanotube cables at the necessary scale and length remains beyond current production capabilities.

The third challenge is human habitability at extreme altitudes. The lower floors of the tower, closer to the ground, would experience near-normal atmospheric conditions. As the structure rises into the stratosphere and beyond, pressure drops, temperature plummets, and cosmic radiation increases. Designing sealed, pressurized living modules for long-term occupation at those altitudes is a problem currently addressed only in spacecraft and space station engineering, not in architecture.

Analemma Tower Program and Interior Organization

Despite the speculative nature of the project, Clouds Architecture Office developed a detailed program for how the tower’s interior would be organized across its extreme vertical range. The structure is divided into zones that correspond to both practical accessibility and the atmospheric conditions at different altitudes.

Business activities are located at the lowest floors of the tower, closest to the Earth’s surface. This placement reflects the logic of access: these are the areas most easily reached during the tower’s slow orbital passes over key transfer points. Above the business zone, approximately two-thirds of the way up the structure, residential and sleeping quarters are located. These levels would benefit from the tower’s extraordinary views while remaining within a zone where engineering systems could maintain livable conditions with greater consistency than at extreme altitudes.

The uppermost sections of the tower are reserved for devotional and funerary spaces, a programmatic choice that reflects the project’s more philosophical ambitions. At those elevations, the experience shifts from conventional occupancy toward something closer to contemplation at the edge of space. Agricultural and food production spaces, dining areas, retail, and public transfer stations are distributed throughout the lower and mid-tower sections to support the self-contained community the project envisions.

Window design changes significantly along the tower’s height. At lower elevations, windows follow conventional proportions. As the structure rises into atmospheric zones with significant pressure differentials, window shapes shift toward rounded forms better suited to containing the pressure differences between the interior and exterior environments, a design logic borrowed directly from aircraft and spacecraft engineering.

Self-Sustaining Systems: Power, Water, and Vertical Transport

Because the tower would have no connection to terrestrial infrastructure, the design includes a complete set of self-contained systems for energy, water, and movement.

Power generation relies on solar panels positioned at the tower’s uppermost levels, above the densest layers of the atmosphere. At those elevations, the panels would receive uninterrupted sunlight throughout the orbital cycle, with no cloud cover or atmospheric diffusion to reduce output. This is broadly analogous to how the International Space Station generates power, though the scale and engineering of such a system for a large inhabited structure would require significant advancement over existing space solar technology.

Water management uses a semi-closed-loop recycling system designed to minimize dependency on external supply. The system would collect rainwater and cloud condensation from the atmosphere, filter and purify it, then recirculate it for potable and domestic use. Any losses from the closed loop would be replenished through continued collection from atmospheric moisture. The logic parallels water recycling systems used in long-duration spaceflight, adapted for a structure that passes through the lower troposphere on each orbital cycle.

Vertical transport within the tower addresses one of the fundamental engineering limits of conventional skyscraper design. Traditional elevator systems using cables are limited in height by the physical properties of the cable itself: beyond a certain length, the cable’s own weight becomes unmanageable. The Analemma proposal invokes electromagnetic, cable-less elevator technology as the solution. While maglev-based vertical transport systems have been under development by companies including ThyssenKrupp, deploying them across a structure 32 kilometers tall would require advances far beyond what current prototypes represent.

For students interested in how real cutting-edge skyscrapers address structural and systems engineering, the skyscraper design trends overview on this site covers current innovations in sustainability, materials, and vertical transportation.

Why Does Analemma Tower Matter for Architecture?

Speculative architecture occupies a particular role in the field. Projects like Analemma Tower do not advance construction timelines or secure planning approvals. What they do is force a reconsideration of foundational assumptions. By asking what a building would look like if its foundation were removed and replaced with an orbital anchor, Clouds Architecture Office opened a set of questions that more conventional design processes never reach.

The concept challenges the assumption that architecture is inherently site-specific and permanent. A building that moves continuously, serves a global corridor of cities in a single day, and has no fixed address redefines what urban belonging and architectural identity could mean. These questions have become more relevant as satellite technology, aerospace engineering, and material science have all accelerated in the years since the project’s 2017 debut.

The project also belongs to a lineage of architectural thought experiments that began with far less technical grounding than Analemma and still proved influential. Archigram’s Plug-In City in 1964 proposed modular, relocatable urban systems that seemed absurd at the time and have since influenced decades of adaptive reuse and prefabricated construction thinking. The value of Analemma Tower as an architectural artifact lies not in its construction probability but in the quality of the questions it generates.

For those interested in other experimental architectural concepts that push against conventional design frameworks, the architectural concept ideas resource on this site explores a wide range of approaches from the practical to the speculative.

The official project documentation is available on the Clouds Architecture Office website. Additional critical analysis of the proposal was published on ArchDaily and Dezeen, both of which provide useful context for understanding how the architectural media engaged with the project at launch. For the engineering context around space elevator concepts that underpin the UOSS system, the European Space Agency’s space elevator overview offers a grounded technical starting point.