New Lantea

"It's stable atmosphere, big ocean. Besides the large, particularly venomous snake-like creature that inhabits the mainland, it looks to be a welcoming environment."

- Rodney McKay

M35-117 is a planet in the Pegasus galaxy, to which Atlantis was relocated following its departure from Lantea in 2007. Before Atlantis came here, the planet had no Stargate and could only be reached by ship.

Overview
The planet has an Earth-like atmospheric composition capable of supporting life, and its sun is a "Class-G" star. Similar to Lantea, it also has a large ocean, in which Atlantis previously resided. Its mainland is notable for a large, venomous snake-like creature, and is home to a plant very similar to Earth's Begonia eiromischa, which was declared officially extinct in 2007. It has five moons, though only two are visible to the unaided eye. The planet is prone to ionospheric storms.

History
The planet was selected after Dr. Elizabeth Weir was captured by the Asurans, in part because it had never been considered by the expedition before; Weir would therefore have no knowledge of it. Keeping its location secret is considered of top priority to prevent the Wraith from finding and destroying Atlantis.

As revealed in an alternate time line, the sun of the system will die and turn into a red giant in about 48,000 years. This causes the planet to become hotter and hotter until eventually the oceans will turn to deserts and the atmosphere will burn off, killing all life on the planet. Regardless, the city of Atlantis itself seemed to have survived in relatively intact condition. The red giant will eventually happen in this reality.

It was revealed that an alien race called the Sekkari crash landed on the planet in a Sekkari seed carrier. It was ultimately transported to a new world by the Apollo.

Later the front half of a diseased Hive Ship sank in the ocean after landing on the surface. The Wraith named Todd, Colonel Sheppard's team, Major Lorne's team and another team of marines were rescued by a rescue team in Puddle Jumpers before the ship sank.

Alternate realities

 * In the first alternate reality Sheppard's team visited on an alternate Daedalus, Atlantis never did land on M35-117, and it wasn't suggested that the Atlantis Expedition started yet.
 * In the second alternate reality Sheppard's team visited on an alternate Daedalus, Atlantis did go to this world, but was under attack from an unknown ship.
 * In the third alternate reality Sheppard's team visited on an alternate Daedalus the planet's sun was a red giant 48,000 years too soon.
 * In the fourth alternate reality Sheppard's team visited on an alternate Daedalus, the planet had an event where a large space object, possibly a giant meteor impacted the planet, destroying it. This may have occurred thousands, even millions of years ago.