[Updated Feb. 19 to reflect Perseverance and Ingenuity’s successful landing] Mars became a fair bit busier this month, with no less than three missions—each from a different country—having arrived at the red planet over the past few weeks. The UAE’s Al-Amal and China’s Tianwen-1 spacecraft entered orbit earlier in February, and NASA’s Mars 2020read more

Pioneering NASA mathematician Katherine Johnson died on February 24, 2020, at the age of 101. Johnson’s calculations were critical in ensuring the success of the early Mercury and Apollo spaceflight missions. Along with fellow mathematicians Dorothy Vaughan and Mary Jackson, Johnson was the subject of the 2016 book Hidden Figures, documenting the contributionsread more