6:39 Wouldn't this be ε = 1 - 1/(λ^2)? This would also make more sense because 1 - ε is between 0 and 1, which would then imply that λ_2 is less than 1, which is clearly not possible because the rocket needs to increase its speed to raise its periapsis.
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6:39 Wouldn't this be ε = 1 - 1/(λ^2)? This would also make more sense because 1 - ε is between 0 and 1, which would then imply that λ_2 is less than 1, which is clearly not possible because the rocket needs to increase its speed to raise its periapsis.