Russia announced that it plans to launch its delayed moon mission, for the first time in almost 50 years.
Russian space agency Roscosmos said it had scheduled the launch of the Luna-25 lander for the early hours of Friday.
With the lunar mission, Russia's first since 1976, Moscow is seeking to restart and build on the Soviet Union's pioneering space program.
The launch is the first mission of Moscow's new lunar project and comes as President Vladimir Putin looks to strengthen cooperation in space with China after ties with the West broke down following the start of Moscow's offensive in Ukraine last year.
Engineers have assembled a Soyuz rocket at the Vostochny cosmodrome in the Russian Far East for the launch of the lander, Roscosmos said.
"The Luna-25 will have to practice soft landing, take and analyze soil samples and conduct long-term scientific research," Roscosmos said in a statement.
The four-legged lander, which weighs around 800 kilograms (1,750 pounds), is expected to touch down in the region of the lunar south pole. By contrast, most previous Moon landings have occurred near the lunar equator.
The spacecraft is expected to reach the Moon around five days after launch.
After Putin sent troops to Ukraine last year, the European Space Agency (ESA) said it would not cooperate with Moscow on the upcoming Luna-25 launch as well as future 26 and 27 missions.
Despite the pullout, Moscow said it would go ahead with its lunar plans and replace ESA equipment with Russian-made scientific instruments.
Speaking at the Vostochny cosmodrome last year, Putin said the Soviet Union put the first man into space in 1961 despite "total" sanctions.
The Kremlin chief insisted Moscow would similarly continue to develop its lunar program despite current Western sanctions in response to the assault in Ukraine.
"We are guided by the ambition of our ancestors to move forward, despite any difficulties and any attempts to prevent us in this movement from the outside," Putin said.
In June, the head of Russia's space agency Roscosmos, Yuri Borisov, described the upcoming launch as high-risk.
"This mission involves landing at the south pole. No one in the world has ever done such things," he said during a meeting with Putin.
"The probability of successful completion of such missions is estimated at around 70%."
Ahead of Friday's launch, local authorities said that residents would be evacuated from the village of Shakhtinsky in the far-eastern region of Khabarovsk, where the rocket's boosters are expected to fall.
During the last Soviet Moon mission in 1976, the Luna-24 brought back samples of lunar soil.
With Sputnik, the Soviet Union launched the first man-made satellite into space in 1957 and later sent into orbit the first animal, a dog named Laika, the first man, Yuri Gagarin, and the first woman, Valentina Tereshkova.
But compared with the Soviet era, modern Russia has struggled to innovate and its space industry is fighting to secure state funding while the Kremlin prioritizes military spending.
Russia's space agency is still reliant on Soviet-designed technology and has faced several setbacks, including corruption scandals and botched launches.
Moscow is also falling behind in the global space race, facing tough competition from the United States and China.
