A composite image of 5 separate photographs taken with a single fixed camera shows a sunspot and the International Space Station in silhouette as it transits the Sun, as seen from near Tbilisi, Georgia June 19, 2021. Picture taken through a telescope. REUTERS/Irakli Gedenidze TPX IMAGES OF THE DAY

A giant screen shows a view of earth from the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter

A giant screen shows Chinese astronauts Nie Haisheng (C), Liu Boming (R), and Tang Hongbo of the Shenzhou-12 mission saluting inside the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter

A giant screen shows an image of the Shenzhou-12 manned spacecraft having successfully docked with the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter

A giant screen shows an image of the Shenzhou-12 manned spacecraft having successfully docked with the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter

A giant screen shows Chinese astronauts Nie Haisheng (C), Liu Boming (R), and Tang Hongbo of the Shenzhou-12 mission saluting inside the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins TPX IMAGES OF THE DAY

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins TPX IMAGES OF THE DAY

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts for China's first manned mission to build its space station, is seen at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts for China's first manned mission to build its space station, is seen at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming speak before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming are seen before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming salute before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

People wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

People wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming salute before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and three astronauts, takes off from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins

The launch pad for the Long March-2F Y12 rocket is seen at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

The launch pad for the Long March-2F Y12 rocket is seen at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

A staff member stands in front of the launch pad at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

The launch pad for the Long March-2F Y12 rocket is seen at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins TPX IMAGES OF THE DAY

The launch pad for the Long March-2F Y12 rocket is seen at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

The launch pad for the Long March-2F Y12 rocket is seen behind Chinese characters of "China" at Jiuquan Satellite Launch Center ahead of the Shenzhou-12 mission to build China's space station, near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronaut Nie Haisheng meets members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronaut Tang Hongbo salutes as he meets members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins

Chinese astronauts Liu Boming salutes as he meets members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins