[dehef]

    Observable.of(rosetta)
         .map(rocket => gravityAssist(rocket,'Earth'))
         .map(rocket => gravityAssist(rocket,'Mars'))
         .map(rocket => gravityAssist(rocket,'Earth'))
         .map(rocket => gravityAssist(rocket,'Earth'))
         .do(rocket => land(rocket))
         .do(rocket => tweetVideo())
         .catch(error => kaput(error))

[iliketosleep]

Or just simply:

npm install rosetta-67P-rendezvous

[aalleavitch]

Then somehow get a completely incomprehensible error about Visual Studio executables.

[matte_black]

Use yarn

[VikingCoder]

Oops. The new probe smashed into Mars at 146 km per second.

It was a leftpad error.