China's first interplanetary Mars mission, Tianwen-1, is scheduled to launch today, 23 July 202o.
China's largest carrier rocket, the Long March 5, will lift off with the Tianwen-1 spacecraft from the Wenchang Satellite Launch Center on Hainan Island in southern China.
The mission compromises of a Mars orbiter, rover, and lander, weighing a total of (including fuel) about 5 tonnes. The spacecraft is expected to reach Mars around February 2021, after which the scientific observation phase will begin in April 2021.
The China National Space Administration (CNSA) has named the mission 'Tianwen-1' after a poem by a popular ancient poet in Chinese history, Qu Yuan.
In the poem, Yuan raises questions about stars and other celestial bodies. The Tianwen-1 mission's name is inspired by references made to 'Heavenly Questions' or 'Questions to Heaven' asked in Yuan's poem.
The launch of the Tianwen-1 is an open secret with CNSA not particularly hiding the relevant information but not exactly being very forthcoming with it either.
This will be the second interplanetary mission to launch this year, after the United Arab Emirates successfully launched their Hope Probe on 20 July. All space agencies are taking advantage of a window of time between 14 July and 12 August 2020, where Mars and Earth are in close proximity. This gives the agencies a relatively long launch window in case of any last-minute technical emergencies or issues.
One Martian year is equal to almost two years on Earth i.e. Mars takes two Earth years to complete one orbit around the sun. It is only once every two years that the two planets come into perfect alignment with each other around the Sun. This alignment is the ideal time for an Earth-Mars journey since it saves on time, money and fuel.
China's unsuccessful past attempts to reach Mars
According to The New York Times, in 2011, China tried to reach Mars but failed. The Chinese space agency had paired its orbiter Yinghuo-1 along with Russias mission to study Phobos, one of the two tiny Martian moons.
The Russian rocket carrying both the spacecraft malfunctioned a little after launch, and it couldn’t escape the Earth's gravity. Both spacecraft eventually burned up in the atmosphere.
When and how to watch it live
The Chinese space agency will not be live streaming the launch of the mission on any of its official pages, YouTube or on any of its official news websites. However, there are a couple of private channels that will be livestreaming the event.
source https://www.firstpost.com/tech/science/chinas-first-interplanetary-mars-mission-tianwen-1-launches-today-23-july-how-to-watch-it-live-8630401.html
