Video
How long does it take to get to Mars - and why is it so difficult?
Why are there so many attempts to get to Mars at the moment?
Nasa's Mars Perseverance Rover has successfully taken off from Cape Canaveral, Florida.
It's after United Arab Emirate's Hope satellite was despatched and China successfully launched its first rover mission to the Red Planet in previous weeks.
Well, summer 2020 is a popular time for missions to the red planet because of the way the planets align.
But how far away is Mars? Why should we go to Mars? And why is landing on Mars known as the "seven minutes of terror"?
Here BBC Science Correspondent Laura Foster explains how long it takes to get there and why it's so difficult.
Video by Megan Fisher, Terry Saunders and Laura Foster
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30 Jul 2020