Even during this window, a one-way trip can last between six to eight months.
NASA said: “The launch period is approximately three weeks, from July 30 to August 15.
“The duration of the daily launch window varies from day to day.
“The launch windows will last approximately two hours, with a unique launch opportunity every five minutes.”
Follow Express.co.uk on the day of the launch to watch it live online.
Perseverance will join NASA’s Curiosity rover, which remains the only active rover on Mars.