Lagrangian point
Names: Lagrangian pointSun-Earth Lagrangian Point
First appears in Book 3: Death's End, chapter 47 (Broadcast Era, Year 7 Yun Tianming)
Appearances
B1
B2
B3
What you know
Book 3: Death's End
- Ch 47The meeting with Tianming will occur at an Earth-Sun Lagrangian point about 1.5 million km away, chosen as symbolic and per Trisolaran custom.
- Ch 47At the Lagrangian point the dinghy orbits the Sun in sync with the Earth, in a place where the Sun's and Earth's gravity balance.
Connections
- containsCheng Xinher dinghy meets the sophon there
Key moments
- Book 3 · Ch 47Meeting with Tianming through the sophon
Cheng Xin meets Tianming via sophon, finds him farming aboard a ship, and learns he can't speak freely. They agree he will tell her stories as coded communication, and arrange to meet at 'our star'.
- Book 3 · Ch 62Bunker Project simulation test
A hydrogen bomb detonated among asteroid stand-ins for the planets. Volunteers sheltered behind the fake Jupiter survived unharmed, and the broadcast brought cheers on Earth.
- Book 3 · Ch 62Wade asks for Cheng Xin's empire
Wade met Cheng Xin behind the Jupiter fragment, asking her to give him everything to build lightspeed ships and warning her not to repeat her past mistake.