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Quite often you ask us for more complex and stimulating questions. So we thought we’d make this one a little tricky. 
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More precisely, it’s the Delta-v formula used to calculate a Hohmann transfer. We hope you had sun with this quite tough question. Feel free to give us more explanations in our replies! #ArianeFacts #Ariane5pic.twitter.com/n8o8EXIyS3
Oe beh alors la je suis largué total ! 
Ne vous en faites pas, Matt, on vous donne la réponse demain ! 
How is it called? 
ΔV for changing orbit radius
What’s the name of the formula?
Not sure, but reminds the trajectory calculation of getting from planet 1 to planet 2
Just one planet here... 
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