When scientists spot an asteroid whose trajectory might take it close to Earth, they monitor it frequently and calculate the probability that it might collide with our planet.

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Happy Pi Day! In honor of the occasion, ...

I have been studying planetary defense, particularly being part of past, ongoing, and future small body missions. I was part of the NASA/DART mission. I am currently part of the NASA/Lucy mission and ...