@NASAinsight How does #NASAinsight land on #mars at the same time given a 35 day launch window?
https://mars.nasa.gov/insight/mission/timeline/launch/launch-windows/ …
Keeping a constant arrival date is highly desirable as it simplifies operations. That's not always possible. It depends on available launch vehicle, availability of communications during EDL + entry speed requirements among other constraints. We can correct out path in flight too