Chang'e-4: Sunset will occur around 20:00 UTC May 29 at the Statio Tianhe landing site in Von Kármán crater. CE-4 lander & Yutu-2 will power down ~24 hrs earlier, ending lunar day 18. Roving expected to be minimal due to upgrading of deep space network ahead of Mars mission.

While we're here: The two years ago, on May 20, 2018, Queqiao ('Magpie bridge') relay satellite was launched from Xichang; It was necessary precursor to the Chang'e-4 lunar far side landing, taking 24-day journey beyond the Moon to the Earth-Moon Lagrange point 2.

From a halo orbit around the gravitationally stable point of E-M L2 Queqiao has line-of-sight to both the lunar far side and ground stations on Earth, facilitating communications which would otherwise be impossible. The view is quite something.

Over time the Moon has become tidally locked, so only the near side faces the Earth (with a little extra visible due to libration). No landing, and none of the images from the far side, would be possible without Queqiao.

Queqiao communicates with Earth via S-band and with the Chang'e-4 spacecraft in Von Kármán crater via X-band, using a huge, 4.2-metre parabolic antenna, the largest ever deployed in space (Galileo's high-gain antenna was larger, but failed to fully deploy).

Also aboard is a Netherlands-China low-frequency astronomy payload. The NCLE is designed for pioneering low-frequency astronomy.

Queqiao's name is taken from Chinese mythology: a bridge crossing the Milky Way once a year to reunite lovers known as the Cowherd and the Weaver Girl. By @haibaraemily1 : https://www.planetary.org/blogs/guest-blogs/2018/0519-change-4-relay-satellite.html

Also along for the ride were two microsatellites, to enter lunar orbit. Longjiang-1 was lost shortly after TLI, but Longjiang-2 used its own propulsion to enter an elliptical lunar orbit.

Longjiang-2 carried two cameras. One, from Saudi Arabia, returned this and other spectacular images:

A student-developed and operated camera has been used to take images of the Moon and Earth which have been downloaded by radio enthusiasts around the world.

Incredibly, the DSLWP-B camera also captured a solar eclipse from lunar orbit.