Wormholes

Wormholes

Tunnels Through Spacetime

How It Works

An Einstein-Rosen bridge is a theoretical tunnel connecting two distant points in spacetime. Instead of crossing the space between them, you enter one mouth of the wormhole and exit the other — regardless of how many light-years separate the two endpoints in normal space. The tunnel can be arbitrarily short even if the mouths are on opposite sides of the galaxy. Wormholes can be natural (spontaneous topological features of spacetime) or artificial (engineered by sufficiently advanced civilizations). In either case, for a wormhole to remain open long enough for anything to pass through — to be traversable — its throat must be propped open by exotic matter with negative energy density. This requirement was formalized by Kip Thorne and Michael Morris in their landmark 1988 paper, which proved that traversable wormholes are valid solutions to general relativity. The physics allows it. The engineering challenge is finding or creating enough exotic matter to build one.

Buck Rogers in the 25th Century (1979)

“I’m Buck Rogers. I’m from Earth — circa 1987.”

— Captain William “Buck” Rogers, Buck Rogers in the 25th Century, 1979

Before the Stargate franchise existed, Buck Rogers in the 25th Century was already using the word “stargate” to describe fixed portal infrastructure enabling interstellar travel. The show’s 25th-century Earth Defense Directorate maintained a network of these portals — permanent installations that connected distant star systems without the need for lengthy sublight journeys. Ships would approach a stargate, transit through it, and emerge at the paired gate on the other side. The concept was presented as established technology, routine enough that it served as a backdrop for the show’s adventure-of-the-week format rather than as a source of wonder in itself. What makes Buck Rogers historically significant in the wormhole lineage is precisely this casualness — it normalized the idea of fixed wormhole infrastructure as a storytelling device more than a decade before Stargate would make the concept its entire identity. The terminology overlap is coincidental but telling: the word “stargate” was simply the obvious name for what a fixed interstellar portal should be called.

Contact (1997)

“They should have sent a poet.”

— Dr. Eleanor Arroway (Jodie Foster), Contact, 1997

Carl Sagan’s Contact treats the wormhole not as infrastructure or natural phenomenon but as a divine gift — a message from the cosmos that you are not alone, delivered in the form of engineering blueprints. When the SETI program detects a signal from the Vega star system, the message contains plans for a machine — a massive, gyroscopic device that, when activated, creates a traversable wormhole. Dr. Ellie Arroway drops through it, traverses a series of tunnels connecting distant points in the galaxy, and arrives at a constructed environment where she meets an alien intelligence wearing the face of her dead father. The entire journey takes roughly eighteen hours from her perspective but registers as a fraction of a second to outside observers. The wormhole is activated once, as a proof of concept. Its purpose is not transportation but communication — the medium is the message. What makes Contact unique among wormhole stories is its restraint. No fleets transit through. No empires are connected. The wormhole exists to answer exactly one question: is anyone out there? Sagan originally asked Kip Thorne to work out the physics of the wormhole for the novel, and that collaboration is what led Thorne to write his 1988 traversability paper. A work of fiction directly advanced real theoretical physics.

Stargate SG-1 (1997)

“Chevron seven, locked.”

— Sergeant Walter Harriman, Stargate SG-1 (recurring line throughout the series, 1997–2007)

Stargate is the franchise that transformed the wormhole from a physics concept into a subway system. The Stargate itself is a ring of naquadah — a superconducting alien mineral — inscribed with 39 symbols representing stellar constellations. To establish a wormhole, you “dial” an address: a sequence of seven symbols (six defining a point in three-dimensional space, plus one point of origin) that lock into place as the gate’s inner ring rotates and each chevron engages. When the seventh chevron locks, the gate activates with a violent burst of energy — the iconic “kawoosh,” an unstable vortex that vaporizes anything in its path — before settling into the shimmering blue event horizon, a vertical pool of light that matter can pass through in one direction only.

The wormhole is one-way for matter but two-way for energy (radio signals can be transmitted back through), and it collapses automatically after 38 minutes unless sustained by an enormous external power source. Dialing can be done manually by rotating the gate’s inner ring, but most civilizations use a DHD (Dial Home Device) — a pedestal-mounted control unit paired with each gate that handles the dialing sequence automatically. Earth’s Stargate lacks a DHD; Stargate Command dials using a jury-rigged computer system, which is slower and occasionally unreliable. The SGC also installed a titanium iris just millimeters from the event horizon — close enough that incoming matter cannot fully reintegrate before striking it — as a defense against hostile incursions. Authorized travelers transmit an IDC (iris deactivation code) before stepping through.

Eight-chevron addresses reach other galaxies (the Asgard homeworld in the Ida galaxy, the Pegasus galaxy of Stargate Atlantis), and a nine-chevron address connects to Destiny, a ship launched millions of years ago by the Ancients. The gate network was seeded across the Milky Way by the Ancients — the same civilization that later ascended to a higher plane of existence — and it functions as a galactic transportation grid. Thousands of gates, on thousands of worlds, accessible to anyone who can work what amounts to a rotary dial. This is narratively brilliant because it creates fixed chokepoints, strategic positions, and the possibility of a wrong number. Stargate’s wormholes are infrastructure. A subway map of the galaxy.

Farscape (1999)

“Boy, was Spielberg wrong. Close Encounters, my ass.”

— John Crichton (Ben Browder), Farscape, Season 1 Episode 1, 1999

If Stargate’s wormholes are a subway system, Farscape’s are hurricanes. The wormholes in Farscape are natural, unstable, and deeply dangerous — they appear without warning, vanish unpredictably, and passage through them is violent, disorienting, and sometimes lethal. You do not choose where they lead. You cannot schedule their arrival. You survive them, if you are lucky, and emerge somewhere you did not intend to be.

The entire series begins when astronaut John Crichton’s experimental Farscape module is caught by a wormhole that flings him across the galaxy to the Uncharted Territories. From that moment, wormholes become the engine that drives every major plot arc. The Ancients — a dying race of beings who understand wormhole physics at a fundamental level — implant wormhole knowledge directly into Crichton’s subconscious. He carries equations he cannot fully access, knowledge he did not choose to receive, and the growing realization that this knowledge makes him the most dangerous person in the galaxy. Both the Peacekeepers and the Scarrans want what is in his head — not wormhole travel, but wormhole weaponization. A wormhole weapon can destroy a planet, or a solar system, or more. The series finale hinges on this threat: Crichton demonstrates the weapon to force a ceasefire, collapsing a wormhole into a black hole that begins swallowing a Scarran fleet before he reverses it.

Farscape understood something that most wormhole fiction ignores: a tunnel through spacetime is not just a convenience. It is a weapon. It is a natural disaster. It is chaos given geometry. The same physics that lets you step from one world to another can also be turned inside out, and the show spent four seasons exploring what happens when that knowledge falls into the hands of someone who never asked for it.

Star Trek: Deep Space Nine (1993)

“It is the will of the Prophets.”

— Kai Winn Adami (Louise Fletcher), Star Trek: Deep Space Nine (recurring line throughout the series, 1993–1999)

The Bajoran wormhole is unique in science fiction: a stable, permanent wormhole that is also a religious site, a strategic chokepoint, and — arguably — a character. Discovered in the pilot episode by Commander Benjamin Sisko, it connects the Alpha Quadrant (familiar Federation space) to the Gamma Quadrant, seventy thousand light-years away. The station Deep Space Nine was repositioned to guard its entrance, and the entire seven-season arc of the series flows from the consequences of that discovery.

The wormhole is maintained by the Prophets — beings that exist outside linear time, dwelling within the wormhole itself in what the Bajorans call the Celestial Temple. They are non-linear aliens who experience all moments simultaneously, and their interactions with Sisko (whom they designate as their Emissary) form the spiritual backbone of the series. The wormhole opens like a blossoming flower of light — an effect that never lost its visual power across 176 episodes — and passage through it is essentially instantaneous.

The strategic implications drive the show’s greatest storylines. When the Dominion — a vast authoritarian empire from the Gamma Quadrant ruled by the shapeshifting Founders — begins sending fleets through the wormhole, the result is the Dominion War, the largest and most sustained military conflict in Star Trek history. The wormhole becomes the single most important piece of real estate in the galaxy. Whoever controls it controls access between quadrants. Mining it, blockading it, praying at it, fighting over it — the Bajoran wormhole is the fixed point around which Deep Space Nine orbits, literally and narratively. It proved that a wormhole does not need to be a vehicle. It can be a place.

Sliders (1995)

“What if you found a portal to a parallel universe? What if you could slide into a thousand different worlds?”

— Opening narration, Sliders, 1995–2000

Sliders applied the wormhole concept in a direction almost no other franchise has explored: not to distant stars, but to parallel Earths. Physics prodigy Quinn Mallory accidentally creates a device — the timer — that opens a wormhole between alternate versions of the same location across different dimensions. Step through, and you arrive at an Earth where history diverged: the British won the Revolutionary War, penicillin was never discovered, dinosaurs never went extinct. The destination is always the same geographic coordinates. Only the reality is different.

The timer is the central constraint. It counts down to the next window in which a wormhole can be opened, and if you miss that window, you are stranded on the current Earth until the next opportunity arises — which could be years, or decades, or never. Early in the series, the original coordinates for home are lost, and the show becomes an odyssey: four travelers sliding from Earth to Earth, never certain whether any given world is their own. The wormhole in Sliders is not a bridge between stars. It is a bridge between possibilities, and the horror is not the vacuum of space but the uncanny valley of a world that looks like yours but isn’t.

Interstellar (2014)

“We used to look up at the sky and wonder at our place in the stars. Now we just look down and worry about our place in the dirt.”

— Cooper (Matthew McConaughey), Interstellar, 2014

When Christopher Nolan set out to make Interstellar, he did something almost unprecedented in Hollywood: he hired a Nobel Prize-winning physicist as a producer. Kip Thorne — who would win the 2017 Nobel Prize for the detection of gravitational waves — didn’t just consult on the film. He co-developed the story, wrote the equations that drove the visual effects, and insisted that every depiction of a wormhole and black hole be consistent with general relativity.

The result was the most scientifically accurate wormhole ever put on screen. It appears near Saturn — placed there by higher-dimensional “bulk beings,” possibly future humans operating from a five-dimensional perspective — as a lifeline for a dying Earth. Crucially, it is a sphere, not a flat circle, because a three-dimensional tunnel through four-dimensional spacetime would appear as a spherical distortion in space. The far side of the wormhole — a star system in another galaxy — is visible as a bubble of warped, gravitationally lensed starlight on its surface. Ships enter by flying into the sphere and traverse a brief tunnel through the bulk before emerging at the destination.

The visual effects team at Double Negative rendered the wormhole by solving Einstein’s field equations for each frame, tracing the paths of millions of light rays as they curved through the warped spacetime geometry Thorne had specified. The computational techniques they developed were so novel that they published a peer-reviewed paper in the journal Classical and Quantum Gravity. A blockbuster film advanced actual astrophysical visualization. Interstellar’s wormhole is not just the most beautiful in cinema — it is the most honest, built from the actual mathematics of general relativity rather than from an art department’s intuition about what a space tunnel should look like.

Guardians of the Galaxy (2014)

“I’m gonna die surrounded by the biggest idiots in the galaxy.”

— Gamora (Zoe Saldaña), Guardians of the Galaxy, 2014

The MCU’s Guardians of the Galaxy treats wormholes with the same casual flair it brings to everything else: jump points are natural wormholes scattered across the cosmos, and you traverse them in quick succession during some of the most visually inventive sequences in the franchise. There is no lengthy technobabble about how they work. Ships approach a jump point, the fabric of space distorts around them, and they emerge somewhere else. Chain enough jumps together and you can cross the galaxy in minutes, though Rocket warns that too many consecutive jumps have physiological consequences — a detail played for comedy as the crew’s faces distort grotesquely during a rapid multi-jump sequence in Guardians Vol. 2.

The jump points are presented as a known feature of the cosmic landscape — charted, navigable, and used routinely by the spacefaring civilizations of the MCU. They are not mysterious or awe-inspiring. They are highway on-ramps. This treatment works precisely because the Guardians films are not interested in the physics of getting from place to place — they are interested in what happens when you arrive. The wormhole is reduced to its purest narrative function: a fast cut between locations.

The Expanse (2015)

“Whatever built the protomolecule, the Ring, and all those systems on the other side — something killed them.”

— James Holden (Steven Strait), The Expanse

The Expanse introduces the Ring Gates — wormhole portals constructed by an extinct alien civilization using the Protomolecule, a piece of alien nanotechnology that arrived in our solar system two billion years ago. When activated, the Protomolecule constructs a massive ring in orbit beyond Uranus that serves as a gateway to a hub-and-spoke network — a pocket of space the characters call the “slow zone,” from which over 1,300 gates radiate outward to star systems across the galaxy.

Each gate connects to a system that the Ring Builders once inhabited — some still containing remnants of their technology, others harboring entire ecosystems they engineered. The network is ancient, robust, and terrifyingly purposeful. But the Ring Builders are gone. Not merely absent — destroyed. Something killed a civilization advanced enough to build a galaxy-spanning wormhole network, and that something still exists in the spaces between dimensions, responding to the energy signatures of ships transiting the gates. The more the gates are used, the more attention humanity draws from whatever extinguished the builders.

This is the darkest use of wormhole infrastructure in fiction. The Expanse takes the standard “ancient alien gate network” trope and asks the question no one else bothers with: what happened to the beings who built it, and should we be using their equipment? The answer — that the gates are essentially a cosmic tripwire — transforms what should be humanity’s greatest discovery into an existential threat. The wormhole is a gift, yes, but it is a gift from someone who was murdered.

MCU / Thor (2011+)

“Your ancestors called it magic, but you call it science. I come from a land where they are one and the same.”

— Thor (Chris Hemsworth), Thor, 2011

In the first Thor film, Erik Selvig and Jane Foster explicitly identify the Bifrost as an Einstein-Rosen bridge — making the rainbow road of Norse mythology into legitimate wormhole physics. The Bifrost connects Asgard to the Nine Realms, summoned and directed by the gatekeeper Heimdall. It manifests as a beam of prismatic light that strikes the ground, transports the traveler through a tunnel of kaleidoscopic energy, and deposits them at the destination. When the Bifrost bridge is destroyed at the climax of the first film, Asgard loses its ability to project power across the realms — a strategic consequence that drives the plot of Thor: The Dark World.

The MCU’s decision to ground Asgardian technology in real physics terminology was deliberate. Rather than treating Thor’s abilities as pure fantasy, the films frame them as advanced science that primitive humans interpreted as magic. The Bifrost is not a spell. It is an artificially generated, controllable wormhole — and calling it an Einstein-Rosen bridge gives it a weight and legitimacy that “rainbow teleportation” would lack. It is one of the cleanest examples in modern fiction of wormhole physics being dressed in mythological clothing.

Wormholes in Gaming

“EVE is a dark and harsh world, and you’re supposed to feel a bit worried and slightly mournful when you log in.”

— CCP Hellmar (Hilmar V. Pétursson), CEO of CCP Games

The wormhole-as-infrastructure concept may have originated in film and television, but gaming has taken it further than any other medium. EVE Online (2003) built the most economically complex virtual universe in history on a backbone of stargates — fixed wormhole infrastructure connecting thousands of star systems across four empires. Player-built jump bridges extend the network into lawless nullsec space, and randomly spawning wormholes lead to uncharted “w-space” systems — dangerous, lucrative, and ungovernable pockets of the universe where the normal rules do not apply. EVE’s wormholes are not just transportation. They are territory, economy, and warfare compressed into a single game mechanic.

Freelancer (2003) used jump gates — fixed installations connecting major systems — alongside natural jump holes, hidden connections that smugglers and explorers used to bypass the charted routes. Wing Commander (1990) threaded its Kilrathi war campaigns through jump points, fixed connections between systems that made strategic chokepoints the centerpiece of every military operation. Control the jump point, control the system. Lose the jump point, lose the war.

Destiny (2014) introduced the Vex gate network — ancient portals built by time-traveling machines across Mercury, Venus, and dimensions beyond human comprehension. The Vex do not merely use wormholes for transportation; they use them to manipulate timelines, creating loops and paradoxes that serve their inscrutable computational goals. No Man’s Sky (2016) features a portal network of monolithic alien structures connecting distant star systems using glyph addresses — a deliberate echo of Stargate’s chevron system, where entering the correct sequence of symbols opens a passage to a specific world. And Halo (2001) features the Forerunner portal network — ancient alien constructs that create slipspace bridges between distant points. The portal at Voi that connects Earth to the Ark is functionally a wormhole, and Master Chief’s desperate sprint through it in Halo 3 remains one of gaming’s most memorable FTL moments.

The pattern across all these games is the same: wormholes create geography. They transform an infinite, directionless void into a landscape with roads, borders, chokepoints, and frontiers. Without fixed connections between systems, there is no strategic depth — no reason to hold one system over another, no bottleneck to blockade, no shortcut to discover. Wormholes make space navigable, and navigable space makes gameplay possible.

Travel Times

The defining characteristic of wormhole travel is that transit time is effectively zero. You enter one mouth. You exit the other. The journey through the throat — whether it takes a subjective fraction of a second (Stargate, Deep Space Nine) or a few disorienting moments (Interstellar, Farscape) — is negligible compared to the distance crossed. Earth to Jupiter via wormhole: instant, if one exists. Sol to Alpha Centauri via wormhole: instant, if one exists. Sol to the Andromeda Galaxy via wormhole: instant, if one exists.

That conditional is the entire bottleneck. The speed of transit is not the constraint — the infrastructure is. You need a wormhole endpoint at your destination, and if one does not exist there, you cannot go. This is why every wormhole-based franchise must answer the same foundational question: who built the network, and how many endpoints are there? Stargate answers with the Ancients and thousands of gates. The Expanse answers with the Ring Builders and 1,300-plus gates. Deep Space Nine answers with the Prophets and exactly one gate. The number of endpoints determines the scope of the story. A single wormhole creates a chokepoint drama. A galaxy-spanning network creates an empire.

Without a wormhole, you are back to the speed of light problem. Alpha Centauri is 4.37 light-years away. At the speed of light — which you cannot reach anyway — that is a 4.37-year journey. The Andromeda Galaxy is 2.5 million light-years. Even at relativistic speeds, you are talking about lifetimes, or civilizational timescales, or the heat death of the universe, depending on how far you need to go. Wormholes bypass this entirely. They do not make you go faster. They make the distance shorter.

Detection & Signatures

Wormholes, if they exist, would not be invisible. General relativity predicts that a wormhole mouth would produce gravitational lensing — light from background stars would bend around it, creating a distinctive pattern of distorted, magnified starlight. In Interstellar, the wormhole near Saturn is visible precisely this way: a sphere of warped stellar light, with the destination galaxy shimmering on its surface like a soap bubble reflecting a distant room. You can see through it before you enter.

Different franchises assign different signatures to wormhole activity. Stargate’s gate activation produces the kawoosh — a violent, unstable vortex of energy that bursts outward from the gate before settling into the stable event horizon. The gate also produces a detectable energy signature that can be tracked by sufficiently advanced sensors, which is why Stargate Command installed the titanium iris: a physical barrier positioned millimeters from the event horizon that blocks incoming matter from fully reintegrating. You can send a radio signal through a Stargate, but you cannot send a bullet through a closed iris.

In Star Trek, the Bajoran wormhole emits verteron particles — a fictional subatomic particle that serves as a detectable marker of wormhole activity. Deep Space Nine’s sensors track verteron emissions to monitor the wormhole’s status. In the real world, physicists have proposed that wormhole formation or collapse would produce gravitational waves — ripples in spacetime detectable by instruments like LIGO — with a signature pattern distinct from those produced by black hole mergers or neutron star collisions. A wormhole opening would ring spacetime like a bell, and we now have the instruments to hear it.

Farscape’s wormholes are detectable primarily by their electromagnetic radiation — they emit bursts of energy at both entry and exit points, and Crichton eventually learns to detect the conditions that precede a wormhole’s appearance. The Ancients’ implanted knowledge allows him to sense wormhole formation before instruments can, giving him a few seconds of warning that means the difference between riding a wormhole and being torn apart by one.

The Physics: Exotic Matter and the Alcubierre Connection

Wormholes occupy a unique position in the FTL landscape: they are the most scientifically respectable mechanism in fiction. Einstein and Rosen described the theoretical possibility in 1935, and while their original “bridge” was not traversable — it would collapse faster than anything could cross it — Kip Thorne and Michael Morris showed in 1988 that a traversable wormhole is a valid solution to general relativity, if you can find or create exotic matter with negative energy density to hold the throat open. This is a real, published, peer-reviewed result. Not speculation. Not fringe theory. A traversable wormhole does not violate any known law of physics. The only question is whether the exotic matter required to build one actually exists, and whether any civilization could ever obtain enough of it. That “only” is doing enormous work, of course — but the theoretical foundation is solid.

The exotic matter problem links wormholes directly to the Alcubierre drive — both require matter with negative energy density, and both face the same fundamental question: does such matter exist in usable quantities? The Casimir effect demonstrates that negative energy density exists at the quantum scale. Two uncharged metal plates placed very close together in a vacuum experience an attractive force caused by a deficit of virtual particles between them — the energy density in the gap is measurably negative relative to the surrounding vacuum. This is not theoretical. It has been measured in laboratories. Negative energy density is real.

But scaling the Casimir effect from nanometers to something large enough to prop open a wormhole throat is, to put it gently, a materials science challenge that dwarfs anything humanity has ever attempted. The amount of exotic matter required to hold open a wormhole large enough for a person to pass through has been estimated at roughly the mass-energy equivalent of Jupiter, concentrated into a shell thinner than a proton. No known process can produce exotic matter in these quantities. No known material can contain it. The gap between “the physics allows it” and “we can build it” is measured not in years of technological development but in entire paradigms of understanding we have not yet achieved.

Still, the physics does not say “impossible.” It says “we don’t know how yet.” And in the history of technology, those two statements have very different track records. Heavier-than-air flight was “impossible” until 1903. Splitting the atom was “impossible” until 1938. Detecting gravitational waves was “impossible” until 2015. The Morris-Thorne paper did not prove that wormholes can be built. It proved that nothing in our current understanding of physics prevents them from being built. That distinction matters. And it is why wormholes remain the gold standard of FTL fiction — the one mechanism that a physicist can discuss without immediately reaching for the word “fantasy.”

Further Reading