Such a mission may evoke memories of a Hollywood disaster movie such as Armageddon or Deep Impact, but this is very much real and is actually part of the US space agency's first ever planetary defence test.
https://www.dailymail.co.uk/sciencetech/article-11249767/What-time-NASA-Dart-mission-today.html
https://www.dailymail.co.uk/sciencetech/article-11249767/What-time-NASA-Dart-mission-today.html
Mail Online
Real-life Deep Impact: NASA will intentionally crash a spacecraft into an asteroid at 15,000mph TODAY - and the method could one…
The Double Asteroid Redirection Test (DART) was launched last November ahead of a year-long journey to crash into the small asteroid Dimorphos, which orbits a larger one called Didymos.