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27 votes
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Why some USA launches are visible in Europe

Although you probably did see Falcon 9 it would not have been the launch itself but more likely the second stage deorbit burn which occurred after the Maxar WorldView Legion satellites were deployed. ...
Steve Pemberton's user avatar
9 votes

Why some USA launches are visible in Europe

When a satellite is launched, it goes into an orbit, generally a circle or an ellipse. That orbit is centered on earth's center of gravity. One point on that orbit has to be fairly close to the launch ...
Hobbes's user avatar
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5 votes

Is Elon’s “Idiot Index” an over-simplification?

I will wholeheartedly agree with you that it's an oversimplification, but I will also respectfully disagree with the statement, "Since what matters is overall production cost..." In rockets, ...
phil1008's user avatar
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3 votes

Is Elon’s “Idiot Index” an over-simplification?

The function of the index is to trigger the implementation of the algorithm Since what matters is overall production cost, why not just look at that instead of inventing a misleading "index"...
uhoh's user avatar
  • 149k
1 vote

Could SpaceX ever make a Heavy version of Starship Super Heavy

There are a number of options for increasing the lift capacity of Starship, once they basic design is flying re-usably. Firstly they will reduce the margins in some areas. Propellant margins will be ...
Slarty's user avatar
  • 9,560

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