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This article is about the planet. For the Stargate Universe episode, see Earth (episode).
Astrographical information

UniverseGlyph10 UniverseGlyph15 UniverseGlyph20 UniverseGlyph26 UniverseGlyph28 UniverseGlyph13 UniverseGlyph18UniverseGlyph06[1]

Point(s) of origin



Milky Way

Number of Suns


Number of Moons


Societal information



7 billion

Technological period
  • Advanced and extremely advanced technology
  • Information Age
Under control of

Tau'ri (present) Ancients, Goa'uld (past)

"It's beautiful."
"Yes, it is."
Samantha Carter and Jack O'Neill

Earth (Terra in Ancient, Midgard to the humans settled by the Asgard, Tau'ri in Goa'uld, and designated P2X-3YZ by the Tau'ri), is the home planet of the Tau'ri and the cradle of human civilization in the Milky Way. With a population of over 7 billion, Earth was one of the most populated known human worlds in both the Pegasus and Milky way galaxies. This is due to a long period of isolation from any alien contact, as well as their success in thwarting various alien attacks thanks to the staff and personnel of Stargate Command who have also successfully stopped any attacks by various enemies including the Goa'uld, Replicators, Wraith, Ori and Lucian Alliance. (Stargate: Continuum, ATL: "Rising")


Earth was the second planet that the Ancients colonized after they left their home galaxy (the first planet being Dakara). Known to them as Terra, it was the center of their empire in the Milky Way and was from where they launched Destiny, a ship designed to explore the universe. Earth was also home to the city of Atlantis situated in Antarctica which was then much closer to the equator. Between thirty and ten million years ago, the Ancients were forced to leave in Atlantis for Pegasus due to a plague, that was very similar to the Prior plague that was used by the Ori during the crusade. They eventually returned after the war with the Wraith where some chose to join the native humans and integrate into human society, passing on the Ancient Technology Activation gene. They also influenced societies such as the Greeks and Romans, inspiring the myth of Atlantis and passing on their language. (SG1: "Lost City, Part 2", "Avalon, Part 2", ATL: "Rising")

Earth At The Time Of The Ancients Departure

When the Ancients came back to Earth c. 8,000 BC, they found the humans in a primitive state of society and knowledge, and under control of the Goa'uld known as Ra. The Ancients then, seeing that there was no hope of rebuilding their societies, spread out to many lands (integrating into the primitive societies, ascending, making their way to the Stargate in the Southern Pole or dying, leaving the remaining humans in a primitive and defenseless state). Ra remained, controlling Earth until circa 3,000 BC, when an alternate SG-1 traveled back in time and helped the ancient humans to start the rebellion. After that, Ra abandoned the Earth. (SG1: "Children of the Gods", "Moebius, Part 1", "Moebius, Part 2", "The Pegasus Project")


Prometheus in orbit of Earth.

Thanks to the rediscovery of the Stargate, the Tau'ri have come to find out that Humans live on other planets in addition to Earth, each with their own unique cultures. As the Stargate Program progressed, the term Tau'ri eventually came to be used to specifically identify humans from Earth. Earth has one of the largest human populations of any planet in the known galaxies, possibly the largest. Major General Henry Landry believed Earth to be the most densely populated planet in the Milky Way Galaxy.

In 2004, Earth became the focus of the System Lord Anubis. In what became known as the Battle of Antarctica, Anubis came with his mothership and a massive fleet of Ha'taks, which were destroyed by Drone weapons launched by SG-1 from the Ancient outpost in Antarctica, Anubis was left without a physical form in orbit. (SG1: "Lost City, Part 2")

In 2009, Earth came under attack from the Super-hive. After waiting behind the Moon for its systems to mature, the ship moved into Earth's orbit and sent out a wave of Wraith Darts that was able to destroy the Control chair, one of Earth's greatest defenses, during the Battle of the Super-hive. All other Earth attempts to defend against the upgraded Hive Ship also failed. However, Atlantis utilized its Wormhole drive and was able to confront the Hive Ship, and through the work of Lt. Colonel John Sheppard's team was able to detonate a Nuclear warhead on board the ship. After the battle, Atlantis remained on Earth in San Francisco Bay. (ATL: "Enemy at the Gate")


Earth long distance.

In 2010, Earth was again the target of an attack by the Lucian Alliance. The Alliance personnel kept aboard the Ancient vessel Destiny complied with Homeworld Command and divulged as much information as they could regarding the attack, however it proved to be insufficient. The Alliance outfitted a Goa'uld Tel'tak with a naquadriah-enhanced bomb and flew it cloaked into The Pentagon as a surgical strike against the Tau'ri. The effort was ultimately thwarted by MSgt. Ronald Greer and Camile Wray with the help of Dr. Andrew Covel and Senator Michaels and Varro. (SGU: "Alliances")


The combined Earth military is divided between roughly 190 independent governments, most of which are not privy to the knowledge of life beyond the stars. Only five countries possess interstellar military capability. Thanks to its long period of isolation, Earth has managed to develop beyond the pre-enlightenment period most societies are forced into by either the Wraith or Goa'uld. Earth is still primitive in comparison to some alien cultures but possesses technology arguably more advanced than any other in existence, particularly militarily. Tau'ri military technology relies on metallic projectile weapons, chemical explosives, and short to intercontinental ballistic and nuclear missiles. The more powerful Tau'ri nations possess Nuclear warheads.

The five permanent members of the United Nations Security Council have access to an array of extraterrestrial technology and weapons. These nations have reverse-engineered various starship and weapons designs, particularly those of the Asgard and the Ancients. The United States of America in particular has risen in little more than a decade from a planetary-based power to an intergalactic power, with several capital ships and offworld bases.


Main article: Locations on Earth

Alternate realitiesEdit


Europe devastated by the Goa'uld invasion.

Alternate timelinesEdit

Siege (2)

Earth under siege from Ba'al.

Behind the scenesEdit

While never given a planetary designation during any of the on-screen material, in the Secret Files of the SGC bonus features on the Stargate SG-1 DVDs (in which the viewer is said to be watching top secret SGC files), Earth is identified as P2X-3YZ.



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