Three countries are taking advantage of that window - the United Arab Emirates, the United States, and China - by launching robotic missions to the red planet. Mars exploration has a long history , spacecraft have been sent to Mars since the 1960s.
Robot missions planned for Mars
The Hope Mars probe in July 2020 Source: Getty Images
Every two years the Earth and Mars align, shrinking the time it takes to travel between the planets, and 2020 is one of those years.
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