From The Stargate Omnipedia


  • In a distant galaxy, a race of humans called the Alterans experience a fundamental split in cultural governance. The majority push for a religious focus, while a smaller group push for their people to follow a scientific path. Fearing extreme persecution, the small Alteran group chooses against using technology to effectively brainwash their brothers -- instead departing in a ship for a galaxy to call their own. The scientific Alterans will henceforth be known as Ancients, and the religious zealots they left behind, the Ori. ("Avalon, Part 2;" "The Fourth Horseman, Part 1;" The Ark of Truth)
  • At the time of their departure from their home galaxy, the Ancient Amelius begins to develop Stargate technology. (The Ark of Truth)
  • The Ancients make the Milky Way Galaxy their new home. They seed numerous worlds with Stargates as well as human life, and settle on a planet they name "Terra": Earth. ("Avalon, Part 2")
  • Some time later the Ori will eventually discover how to ascend, establishing the Origin religion and creating planets full of human worshipers to feed their need for energy.


  • The Ancients form an alliance with three other races in the galaxy including the Asgard, the Nox, and the Furlings. They establish a meeting planet on Heliopolis as a sort of galactic "United Nations." ("The Torment of Tantalus")
  • Proclarush Taonas is abandoned by the Ancients. ("The Pegasus Project")
  • A terrible plague cripples the peoples of the Milky Way, decimating Ancient colonies across space as well as on Earth. ("Window of Opportunity," et al)
  • The Ancients of P4X-639 engineer a time machine to go back before the plague to reverse it, but discover the flawed technology only goes backwards by 10 hours. They eventually deactivate the device and accept their fate. ("Window of Opportunity")
  • The Ancients create a device on Dakara to repair the damage caused by the plague. ("Threads")
  • The Ancients of Earth abandon their interests in the Milky Way and set course for the nearby Pegasus Galaxy in Atlantis. Ayiana, a carrier of the plague, is left behind. ("Rising")
  • The Dakara device activates to relaunch the Milky Way's evolution process. (Conjecture in relation to other events)
  • The Ancients arrive in the Pegasus Galaxy. As before, they create a network of Stargates and seed human life on numerous planets. Atlantis makes its home on the planet Lantea. ("Rising")
  • The Ancients establish a network of defense satellites in the Lantean System. ("The Defiant One")


  • The Ancients dispatch the Destiny into the far reaches of the universe to discover a signal they have located buried in the fabric of space-time since the dawn of creation. ("Air, Part 2")

c. 100,000 YEARS AGO

c. 30,000 YEARS AGO

  • A crew of Asgard depart their planet in suspended animation. At this stage in their development they are still capable of sexual reproduction. ("Revelations")

c. 15,000 YEARS AGO

c. 11,000 YEARS AGO

  • The Altairan (not to be confused with the Ancients) Hubbald establishes an underground complex on Altair to take the place of the planet's failing biosphere. ("Tin Man")


  • Iratus bugs sample human blood in the Pegasus Galaxy and, mixing human DNA with their own, eventually evolve into the Wraith.
  • The Wraith develop as a sentient society, constructing ships and weapons to feed their hunger for human life essence.
  • The Ancients engage the Wraith in battle. Though they are superior in technology, the Wraith are superior in number. A 100-year war ensues. ("Before I Sleep")
  • The Ancients construct the Replicators as a weapon in the conflict with the Wraith, but the artificial life forms evolve rapidly. The Ancients eventually abandon the project and bomb the Replicator homeworld of Asuras -- but the "Asurans" survive, and begin to rebuild their civilization in the absence of their makers. ("Progeny")

10,000 YEARS AGO (8000 BC)

  • The Goa'uld Ra discovers the planet Earth via mothership and takes a host from the North African desert. He proceeds to abduct humans from across the planet to spread among the stars as slaves.("Stargate" the Movie)
  • The Ancient warship Aurora is sent to the outer rim of the Pegasus Galaxy to gather information concerning a weakness in Wraith defenses. Life support fails before they can return to Atlantis with the information they have obtained. The crew survive in stasis pods. ("Aurora")
  • An Ancient entrusts the Quindosim with a Zero Point Module. The Quindosim would eventually be culled by the Wraith. ("The Brotherhood")
  • Chaya Sar ascends and takes on the guise of Athar, goddess protector of Proculus. She lashes out with her ascended powers against the Wraith. Ascended beings in the Pegasus Galaxy punish her by forcing her to protect Proculus for all time. ("Sanctuary")
  • Unable to survive the overwhelming assault of the Wraith, the Ancients forfeit the 100-year war. They recall their forces to Atlantis for a final stand and create a window for Lantean refugees to return to Earth through the Stargate. Numerous ships reach the Lantean System but are destroyed. ("Before I Sleep")
  • Having narrowly escaped a catastrophic power failure in 2004, John Sheppard, Radek Zelenka, and Elizabeth Weir unwittingly trigger a time jump in a Puddle Jumper to this time period. After a fatal crash, Weir is the only survivor, recovered by the Ancients. ("Before I Sleep")
  • Having lost the war with the Wraith, the Ancients sink Atlantis deep beneath the Lantean oceans. Janus, the inventor of the time-traveling Puddle Jumper, disobeys the orders of the Council and leaves Elizabeth Weir in the city. She goes into stasis for 10,000 years, waking at intervals to regulate the city's power systems so that she may avert Atlantis's future power failure. ("Before I Sleep")
  • Realizing they have missed the evacuation of Atlantis, the crew of the Ancient warship Tria set a course for the Milky Way at light speed. ("The Return, Part 1")
  • The Lantean survivors, now on Earth, attempt to avoid influencing the primitive human tribes who now live there. Moros, Ganos Lal, and numerous other Ancients seclude themselves and learn to ascend, while over time the rest die out. ("The Pegasus Project")

6,700 YEARS AGO (4700 BC)

5,000 YEARS AGO (3000 BC)

  • Ishkur's elite force of Jaffa commanders rebel against him. He orders their deaths, but they flee in search of the mythical world of Kheb. The traitors find a secluded planet of their own and become the Sodan. ("Babylon")
  • SG-1 travels back in time and unwittingly participates in the uprising against Ra in Ancient Egypt, driving the Goa'uld System Lord from the planet. The rebels bury the Stargate at Giza so that it may be found in the future. SG-1's presence in the past is hidden from history. ("Moebius, Part 2")
  • After the human rebellion Ra loses interest in Earth. To prevent another uprising elsewhere, he outlaws reading and writing in Abydonian culture. ("Stargate" the Movie)

c. 4,000 YEARS AGO (2000 BC)

3,400 YEARS AGO (1400 BC)

c. 3,000 YEARS AGO (1000 BC)

c. 2,000 YEARS AGO

c. 450

  • Sensing the growing threat of the Ori, the Ancient Moros abandons ascension to retake human form. Now known as Myrddin, he establishes an enclave of noblemen including Arthur and the Knights of the Round Table. During this period Myrddin, who retains his knowledge as an Ancient, is the most powerful human being on the planet. The other ascended beings order Ganos Lal to monitor him. She takes on the name of Morgan Le Fay. ("The Quest, Part 2")
  • Aware of the ongoing threat of the Ori in another galaxy, Myrddin creates phase-shifting technology to aid him in secretly developing a weapon capable of destroying ascended beings -- keeping it hidden from the Ancients. Realizing his intention to one day destroy the Ori, Morgan destroys the device and traps Myrddin within an isolated Stargate network. ("Arthur's Mantle," "The Quest, Part 2")

c. 750

c. 1000

  • The inhabitants of P7J-989 advance their technology too rapidly, and a chemical disaster renders the planet uninhabitable. Several citizens are placed in suspended animation within a bio-dome, their minds kept active by computer. ("The Gamekeeper")
  • Sokar visits Earth and captures a group of medieval Christians. ("Demons")
  • The alien race of PXY-887 end the oppression of the Goa'uld on their planet and take the guise of Spirits to live in harmony with the transplanted Salish tribe. ("Spirits")
  • Anubis is banished by the Goa'uld System Lords. Though they believe him to be dead, in fact he departs for Kheb, where the ascended being Oma Desala teaches him to ascend. The ascended collective witnesses Anubis's treachery and attempts to force him back to the mortal plane -- but they only succeed halfway. Now part ascended, Anubis departs the Milky Way Galaxy with the Ancient knowledge he has learned -- and Oma is punished for her actions. ("Last Stand;" "Threads")
  • The Asgard lose their ability to sexually reproduce, and adopt a "quick-fix" with cloning technologies. Though their scientists continue to work on the problem, genetic degradation is inevitable. ("Revelations")

c. 1100

c. 1300

  • Pyrus is born, and will use the sarcophagus technology to live for hundreds of years. ("Need")

c. 1500

c. 1550

c. 1700

c. 1797

c. 1800

c. 1850


c. 1895



  • The D.H.D. is uncovered (without the Stargate) by Germans at a dig in Giza, and soon comes into the possession of the German government -- who are for many years unaware of its significance. ("The Tomb")




  • The Stuart Expedition fails. Numerous crates, including one carrying the canopic jars of Osiris and Isis, sink with the shipwreck. ("The Curse")


  • Dr. Wilhelm Brücke finds the Stargate being studied by the Langfords in a Cairo warehouse, and abducts Dr. Paul Langford for an ill-fated trip to Abydos. Only Dr. Langford and his daughter survive, and are returned to Earth with their memories of the event wiped. (Stargate Origins: Catherine)
  • Ra's regional governor on Abydos, Aset, is found to be plotting against him and is killed. Ra orders the Stargate relocated from her temple.
  • The Stargate is ferried across the Atlantic Ocean aboard the steamship Achilles. Baal's plan to travel back in time and alter history is thwarted by Cameron Mitchell, who arrived from the future 10 years earlier. (Stargate: Continuum)



  • President Franklin Roosevelt suspects the Stargate to be a weapon and orders Dr. Langford to study the device for possible use in the war. A project of random, manual dialing opens the Stargate to the planet Heliopolis. Ernest Littlefield is sent to investigate and is trapped on the other side when the gate disconnects. ("The Torment of Tantalus")
  • After the apparent loss of life during the Langford's research, the U.S. government orders the Stargate research program mothballed. The gate is locked away and the Langfords and their partners sworn to secrecy. ("1969")
  • At the end of World War II the Russian army discovers the Giza D.H.D. in Germany, and takes it back to Russia. ("Watergate")





  • A solar flare sends SG-1 from 1999 to this point. The team is taken into custody by the Air Force, but a young Lt. George Hammond recognizes a note in his own handwriting and helps the team escape. With help from Catherine Langford and the future Hammond, SG-1 uses the Stargate and returns to their own time. ("1969")







  • In a distant galaxy, groups of Novans branch out into their galaxy to colonize other worlds when it is apparent that the geology of their planet is coming undone.


  • The U.S. government begins a new scientific endeavor to engineer a supercomputer capable of interpreting data pulses generated by the Stargate and successfully dialing the device. It would take 15 years and three supercomputers to find a way to manage the gate's basic systems in the absence of its companion D.H.D. ("Children of the Gods")










c. 1996 ("Stargate" the Movie)

NOTE: That the film's events take place two years later than its theatrical release is established by the 1-year gap prior to "Children of the Gods" and Carter's statement that "Out of Mind" takes place in the year 1999. (This assumes that roughly one season of the TV show equals one year of time, which is confirmed by statements about the passage of time in later seasons.)

  • Jack O'Neill's son, Charlie, dies of a self-inflicted gunshot wound in an accident at home. The tragedy will eventually lead to the end of Jack's marriage to Sarah.
  • Daniel Jackson is recruited by a now elderly Catherine Langford to interpret the Stargate's glyphs, with the intention of identifying a valid address to dial.
  • The Stargate is successfully opened to the planet Abydos. Jack O'Neill leads a team through to assess any threats to Earth, and if necessary, use a nuclear device to destroy everything on the other side.
  • Sha're, the Abydonian princess, is betrothed to Daniel Jackson.
  • Ra is killed and the oppressed Abydonian civilization is freed. The death of the "Supreme System Lord" will allow other Goa'uld, including Apophis, to become more powerful.

1997-1998 (SG-1 Season One)


1998-1999 (SG-1 Season Two)

  • Scientists at Area 51 recover two Goa'uld death gliders and begin to retrofit them for the X-301.
  • Samantha Carter is forcibly blended with Jolinar, who is on the run from a Goa'uld ashrak. Jolinar expends all of her energy to preserve Carter's life.
  • SG-1 is sentenced by the Taldur to life imprisonment in Hadante. The team works with Linea to leave the prison world. Once out Linea, called "Destroyer of Worlds," escapes.
  • With Thor's Hammer destroyed, Heru'ur takes Cimmeria for himself. Daniel Jackson breaks the natural cycle of Cimmerian development for the people and reveals the Asgard -- their gods -- prematurely. Thor arrives in the Asgard mothership Beliskner to wipe out Heru'ur's forces. But Heru'ur himself escapes.
  • The P5C-353 Orb is brought back to Earth, where it is opened. Stargate Command agrees to deposit the Orb on P4G-881.
  • Apophis takes Rya'c as his pupil. Teal'c receives word and returns to Chulak to rescue his son.
  • One Abydonian year to the day, Daniel returns to Abydos and finds Sha're with her father. She is pregnant, and the Goa'uld Amonet is sleeping so that the child will not emerge stillborn.
  • Jacob Carter informs his daughter Samantha that he has lymphoma and a terminal diagnosis.
  • Shifu, the son of Apophis and Amonet, is born. Heru'ur travels to Abydos to steal him, but Daniel Jackson hides the baby among the Abydonians and makes Amonet think Heru'ur was successful. Apophis, hoping to meet his newborn son, leaves only with Amonet.
  • SG-1 meets the Tok'ra and establishes a tentative alliance.
  • Selmak, in need of a new host, blends with Jacob Carter and becomes Earth's envoy. Saroosh, Selmak's previous host, dies.
  • SG-1 tampers with the natural balance between the Salish and their Spirits, forcing the spirits to reveal their true nature.
  • Rogue N.I.D. agents remove the Touchstone from Medrona, plunging the planet into an ice age. SG-1 retrieves the device and returns it to the Medronans before the damage is permanent.
  • Jack O'Neill accidentally downloads the entire database of the Ancient repository of knowledge into his mind. The information in his brain allows him to install numerous new Stargate addresses, not known to the Goa'uld, into the dialing computer. O'Neill sends himself to the Ida Galaxy where the Asgard remove the knowledge.
  • A black hole causes P3W-451 to succumb to a time dilation field, trapping SG-10 on the planet.
  • Apophis pleas with SG-1 to protect him from Sokar. He dies of his injuries at Stargate Command. Teal'c sends his body through the Stargate to the waiting hands of Sokar, who reanimates Apophis to repeatedly torture him to death.
  • Ma'chello tricks Daniel Jackson into transferring bodies. He leaves the base for Colorado Springs, but the authorities soon capture him. Ma'chello is forced to return to his original body, where he dies.
  • George Hammond notices the same wound on Samantha Carter's hand, and realizes the time has come to write the note to his younger self. After an adventure in 1969 and the distant future, SG-1 returns to their proper time.
  • Hathor captures SG-1 and stages an elaborate hoax to gain what information they have about the current Goa'uld domain. A Tok'ra agent helps free the team. O'Neill pushes Hathor into a cryogenic soup, killing her.

1999-2000 (SG-1 Season Three)

2000-2001 (SG-1 Season Four)

2001-2002 (SG-1 Season Five)

2002-2003 (SG-1 Season Six)

2003-2004 (SG-1 Season Seven)

2004-2005 (SG-1 Season Eight, Atlantis Season One)

2005-2006 (SG-1 Season Nine, Atlantis Season Two)

2006-2007 (SG-1 Season Ten, Atlantis Season Three)

2007-2008 (Atlantis Season Four, The Ark of Truth)

2008 (Atlantis Season Five, Continuum)

2009-2010 (SGU Season One)

  • Icarus Base personnel and guests are forced to evacuate to the Ancient ship Destiny during a surprise attack. With Earth several billion light years away the small band of survivors prepare for a long journey.
  • Homeworld Command enacts their plan to forcibly remove Colonel Young from command of Destiny, draining her weapon reserves so that they may attempt to dial Earth while she is recharging within a star. Dr. Nicholas Rush rigs a light show to force Colonel Telford and his team to retreat from the ship. Young, now restored to command, makes it clear to the Pentagon that he is in charge of the ship -- whether they like it or not. The Destiny crew begin to settle in for the long voyage ahead.
  • Rush frames Colonel Young for the death of Spencer, who committed suicide from cabin fever. Young coaxes this information from Rush while alone on a planet. A fight ensues and Young, having beaten Rush unconscious, leaves him for dead.
  • The blue aliens reveal themselves and dogfight with Destiny and her shuttle in order to buy time to capture Chloe Armstrong. Colonel Young uses the communication stones to switch bodies with one of the blue aliens, who somehow possess a stone of their own, until he discovers a confined Dr. Rush. Young sets him free, and Rush and Chloe escape with a shuttle.
  • The Destiny crew come upon an artificially created world. A group of the ship's compliment take extended shore leave on the planet while Destiny is out of range, but ultimately several choose to stay permanently. They designate this new world as Eden.
  • Lt. Johansen reveals she is pregnant with Colonel Young's baby, the result of an affair prior to their arrival on Destiny.
  • Chloe Armstrong begins to show signs that she was experimented on by the blue aliens and is undergoing a gradual transformation.
  • Destiny departs the galaxy, crosses a great expanse at F.T.L., and enters a new galaxy.
  • The Lucian Alliance uses a naquadria-enriched planet to dial Destiny and seize the ship by force. Ultimately their leader is defeated and the remaining alliance members are placed under lockdown.
  • Telford reaches Destiny with the Lucian Alliance.
  • T.J. loses her baby in a Lucian gunfight in the medical bay. Destiny, recognizing the medic's emotional well-being is key to the mission as a whole, creates an elaborate hallucination to convince her an omnipresent race transferred her unborn child back to Eden to be raised by the settlers.


  • Earth celebrates the tenth anniversary of its alliance with the Aschen. Only then is it discovered that the Aschen are slowly exterminating humanity by preventing births. SG-1 regroups to send a message into the year 2000. (Defunct timeline) ("2010")

2010-2011 (SGU Season Two)

  • Nicholas Rush cracks Destiny's master control code and discovers the bridge, soon discovering the ship's true mission -- though he keeps it to himself for several weeks.
  • Lt. Riley is critically injured on an away mission, and ultimately suffocated by Colonel Young to end his suffering.
  • Destiny catches up to a seed ship under the control of the Ursini, a nearly extinct alien species. Colonel Telford becomes trapped on their ship when they return to F.T.L. in the middle of a battle.
  • Destiny drops out of F.T.L. and only resumes its course when it is confident Colonel Young has digested his grief for killing Riley and is fit to command the crew.
  • Rush's secret trips to the bridge are discovered, and he is forced to reveal Destiny's true mission to his colleagues.
  • The Lucian Alliance soldier Simeon kills Amanda Perry and Ginn and escapes to a desert planet. Several teams follow him, believing he has critical information regarding an imminent attack on Earth. Rush, however, tracks him down and kills him for murdering the woman he loved.
  • The crew left behind on "Eden" mysteriously return in range of Destiny aboard what appears to be a fully restored shuttle, only to gradually replay their deaths from a terrible winter on the planet. T.J. discovers her child is not among the crew.
  • Destiny enters a conflict with a fleet of drone ships left behind after an ancient war. The Ursini return aboard their seed ship and return Colonel Telford to the crew. The Ursini are ultimately destroyed by the drones.
  • Chloe's transformation by the blue aliens is nearly complete, and she summons them to assist in the fight against the drones. Lt. Scott returns her to them, and they appear to remove whatever was transforming her body.
  • Destiny and her crew are duplicated, the crew being sent 2,000 years into the past, and Destiny back in time a handful of hours. Only Nicholas Rush and David Telford remain from the original timeline. The duplicated Telford is killed by Dr. Rush Prime. Dr. Rush Prime appears to be destroyed along with Destiny Prime when the ship sinks into a star.
  • A Lucian Alliance terrorist attack on Earth is thwarted by Camille Wray and Ronald Greer.
  • Dale Volker's kidneys begin to fail, and Ronald Greer donates one of his.
  • The consciousness of both Amanda Perry and Ginn are discovered floating in the ether of space. Using Chloe and the communication stones, both women's minds are downloaded into Destiny's mainframe.
  • An attempt to use Langara's naquadria core as a power source to dial the ninth chevron fails when their government discovers Earth's duplicity.
  • The remaining surviving Lucian Alliance officers, save for Varro, are killed during a rescue mission.
  • The Destiny crew discovers a human colony of Novans and the truth about what happened to their counterparts. The people are rescued from their planet to return home to Novus. Upon arrival, it is apparent that Novus suffered a geological cataclysm that is still destroying the planet. Destiny downloads as much of the Novan archive as possible before it is destroyed, and the ship sets course to deposit the remainder of the Novans on a new world.
  • T.J. discovers she will contract Lou Gehrig's disease in five years.
  • When the drones' plan to block all Destiny-compatible stars in the galaxy is fully realized, Eli convinces Colonel Young that their only alternative is to "skip" the rest of the galaxy by putting the crew in stasis. But the crew is short one stasis pod, which is broken, and Eli volunteers to stay conscious in the hopes that he can discover a solution.

c. 2070

  • SG-1 enters the Stargate in the year 1969 a few moments too soon, which sends them far into the future. An aged Cassandra uses advanced technology to send them home to 1999. ("1969")

c. 50000