China may soon become just the third country to safely touch down on the
surface of Mars.
On Friday, the China National Space Administration will attempt to land its
rover Zhurong on the red planet, experiencing the so-called "seven minutes
of terror" endured by Martian exploration robots, according to Chinese space
watchers.
The ambitious Tianwen-1 mission to Mars launched in July 2020 and contains
three spacecraft: an orbiter, which is now circling Mars, a lander and a
rover. This is China's first mission to Mars and landing on the planet is a
difficult task — Only around half of the trips to the planet have proven
successful and no agency beside NASA has landed on the surface since
1973.
China has been relatively quiet about when we can expect the entry, descent
and landing to begin, but reports suggest it will occur at 4:11 p.m. PT
(11:11 p.m. UTC) on May 14. The lander and rover are currently encased
within a protective shell, but will detach from the orbiter earlier and
begin to head toward the surface.
When it hits the Martian atmosphere, the (approximately) seven minutes of
terror begins. The lander-rover duo will slam into the tenuous atmosphere,
safely tucked within a heat shield. Once the spacecraft punches through, the
heat shield will fall away and a parachute will be deployed to slow the
vehicle down.
Zhurong's landing will look a little different to that made by NASA's
Perseverance rover in February 2021. The NASA robot was lowered to the
surface carefully via the agency's tried-and-true "skycrane" method, which
saw the rover softly touch down in an ancient Mars lakebed.
Zhurong's descent will feel similar to Perseverance, but the lander will be
doing all the work. It uses a suite of cameras and LIDAR to navigate to the
surface. If the touchdown is a success, it will deploy a ramp for Zhurong to
roll out onto Mars and begin its exploration mission.
The landing zone is Utopia Planitia, the same region of Mars where NASA's
Viking 2 lander touched down in 1976. Viking 2 was a particularly
interesting mission because some scientists suggested it had found signs of
life.
China is aiming for Zhurong to spend 90 sols (Martian days) on the
surface.
We'll be sure to have a livestream link if one becomes available -- but if
the country's Chang'e missions to the moon are anything to go by, I wouldn't
expect to see too much until landing has been confirmed.
Source: Link
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Space & Astrophysics