摘要
There are three sequential Mars exploration missions in 2020.On July 20,the United Arab Emirates(UAE)“Al-Amal”(Hope)Mars orbiter was launched in Japan.On July 23,China successfully launched the“Tianwen-1”(Questions to Heaven)Mars probe with the Long March 5 rocket(Figure 1).On July 30,NASA's most advanced Mars rover,the“Perseverance,”lifted off from Cape Canaveral Air Force Base in Florida.So far,the three Mars missions in the launch window of this round have been successfully implemented,which is relatively significant with regard to the COVID-19 pandemic.However,the ExoMars 2020(Exobiology on Mars)mission,a joint venture between the European Space Agency and its Russian partner,has been delayed until 2022 because of a mixture of technical gremlins and the COVID-19 outbreak.
