Dial Home Device

Verified Timeline

Lore & Background

The device's design is remarkably consistent across the galaxy, featuring a central sphere surrounded by five fixed arms that interface with all thirty-nine symbols on the Stargate's inner ring. The thirty-ninth symbol, the point of origin, corresponds to a dedicated button on the DHD, not a separate button on the ring. When a user touches the correct sequence of symbols on these arms, the DHD communicates with the gate, powering up the chevrons and opening the wormhole. Its destruction often leaves a planet isolated, stranded in space until another DHD can be recovered or a workaround is engineered.

In Their Own Story

The dust of the desert swirled around the metallic ring embedded in the stone platform. Dr. Jackson wiped sweat from his brow, staring at the silent sphere beside it. The Goa'uld had fled, leaving the gate dark and useless without its partner. He stepped closer to the DHD, tracing the cold, smooth surface of one of its arms with a trembling finger. 'Just need to find the right sequence,' he muttered, recalling the alien glyphs etched in the rock above. As his hand hovered over the final symbol, the machine hummed to life, a low vibration traveling up his arm before the event horizon shimmered into existence.

Reader's Guide

The Dial Home Device functions as the remote control for the Stargate system. It consists of a central orb and twelve extendable arms, each capable of displaying one of the thirty-nine symbols found on the gate's ring. To operate it, a user must physically touch the sequence of symbols corresponding to the destination planet in the correct order. Once the final symbol is engaged, the DHD sends an electrical signal to the Stargate, activating the chevrons and spinning the inner ring until the wormhole stabilizes. While originally designed for Ancient use, many human civilizations have learned to operate these devices after recovering them from ruins or capturing them in battle. However, they are fragile; if damaged or destroyed, the gate becomes a useless hunk of metal unless a replacement is found.

Did You Know?

• Earth's Stargate lacks its original DHD, requiring manual compensation for stellar drift—a fix developed by Samantha Carter and Daniel Jackson in the episode 'The Fifth Race'.
• The DHD normally attached to each stargate automatically updates for stellar drift; Earth's gate lacks this device.
• In the Stargate Universe series, the earlier-model stargates on Destiny's network have no planetary DHD; explorers must use a handheld gate dialer (often called a remote control) to input addresses.
• The Goa'uld used stargates to transport slaves between worlds, leading many civilizations to treat the gate as a religious relic of fear and evil.
• The Stargate concept was inspired by theoretical astrophysics of black holes and wormholes, though real-world physics suggests such travel would destroy a human.

Origins and Conceptual Foundations

The Stargate emerged as a fictional Einstein-Rosen bridge portal within a expansive science fiction universe, debuting in Roland Emmerich's 1994 film before permeating numerous television series and direct-to-video productions. Its core concept envisions two distant devices forming a singular physical gateway when activated, enabling near-instantaneous travel across interstellar or even extragalactic distances without conventional spacecraft. While the specific narrative was crafted by writers Dean Devlin and Roland Emmerich, the idea draws from earlier speculative works like Arthur C. Clarke's 2001: A Space Odyssey and Robert Heinlein's Tunnel in the Sky. The device's theoretical underpinnings rely heavily on astrophysics concepts such as black holes and wormholes, which serve as shortcuts through space. However, real-world physics suggests that traversing such gravitational anomalies would likely destroy any human traveler due to excessive gravity. Despite these scientific hurdles, the fictional Stargate functions as a crucial plot mechanism, allowing characters to explore alien worlds instantly. The concept also faced legal scrutiny regarding potential plagiarism from an earlier screenplay by Omar Zuhdi, though this dispute was ultimately settled out of court.

Discovery and Historical Backstory

The narrative history of the Earth Stargate begins in 1928 at Giza, where archaeologist Paul Langford unearthed the alien device while his daughter Catherine watched. To prevent Nazi acquisition during World War II, the American ship Achilles transported the gate to the United States in 1939. For decades, it remained a classified military asset stored in various locations, including Washington D.C., and was even studied as a potential weapon before being mothballed. The story jumps to 1994, where an aged Catherine Langford recruits Daniel Jackson, an archaeologist ridiculed for his theories on the Great Pyramid's origins. At Cheyenne Mountain, Jackson deciphers hieroglyphs on cover stones, realizing they represent constellations rather than words. By identifying six stars and a seventh point of origin symbol, he successfully activates the gate for the first time in modern history. Initially, it was believed only two gates existed, connecting Earth to Abydos billions of light-years away. Later revelations expanded this understanding, showing that stellar drift had obscured many coordinates until Samantha Carter updated the dialing system, unlocking a vast network of destinations previously thought inaccessible.

Operational Mechanics and Network Expansion

The functionality of the Stargate relies on a complex addressing system involving seven symbols: six representing specific constellations to pinpoint a destination, and one acting as a point of origin. Initially, Earth's gate lacked its original Dial-Home Device (DHD), which is normally attached to gates elsewhere in the galaxy to automatically compensate for stellar drift over millions of years. This absence meant that early dialing attempts failed because the stars had moved from their ancient positions. Once Samantha Carter reworked the Earth-based system to account for this movement, a massive network of valid coordinates became accessible. Further expansion occurred when Colonel Jack O'Neill discovered a repository of Ancient knowledge containing even more addresses. The DHD plays a critical role in ensuring accurate travel; without it, or without manual adjustments for drift, connections cannot be established. This mechanic transformed the Stargate from a single-point link into a galaxy-spanning transportation grid, allowing for exploration and strategic movement that defined the subsequent television series.

Cultural Impact and Narrative Role

Within the fictional universe, the Stargate serves as both a technological marvel and a source of deep cultural fear. The dominant evil power, the Goa'uld System Lords, utilized these portals to enslave populations across thousands of planets, posing as gods while transporting slaves between worlds. Consequently, many civilizations descended from these former slaves view the device as a religious relic associated with ancient terror rather than a tool for exploration. For Earth, the gate became the foundation of the Stargate Command (SGC), a top-secret Air Force base established to defend against superior alien threats and facilitate intelligence gathering. Teams like SG-1 were formed specifically to traverse these gates, seeking allies and technology to combat the Goa'uld. The device's presence fundamentally altered human history in this timeline, shifting focus from traditional space travel to instant interstellar diplomacy and warfare. Its role as a plot device allowed for diverse storytelling across multiple series, enabling characters to visit primitive worlds and advanced civilizations without the logistical constraints of spaceships.