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imagine you work for the MMS mission

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your goal is to measure how the sun's

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and Earth's magnetic fields connect and

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disconnect explosively transferring

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energy from one to the other

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we call this magnetic reconnection we

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want to get a 3d observation of magnetic

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reconnection to do this you'll need

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measurements at four different points a

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single base point and one additional

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point for each dimension this means you

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have to build not one but four

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spacecraft and you'll need to pack each

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one with 25 instruments you'll need to

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arrange them so that they are not

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blocking each other and so that the

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magnetometers are held safely away from

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the spacecraft's body but wait you only

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have four years to build test and launch

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all of them it typically takes four

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years to build just one so you won't be

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able to build them one at a time you'll

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have to work on them concurrently you'll

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need a team to help you do that they

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will need space to work so you'll have

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to build a cleanroom and you'll have to

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keep all of your people paper and tools

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organized because you'll have to wrap

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four sets of wires and prepare four sets

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of flight hardware and do four sets of

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tests and make sure that everyone is

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working on the right project at the