A one-second video taken by the Rosetta probe on the surface of a comet

Re:A one-second video taken by the Rosetta probe on the surf... by robotresearcher on Wednesday April 25, 2018 @10:43AM (#16921914)

Moving at 135,000 km/h relative to what? (honest question)

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Re:A one-second video taken by the Rosetta probe on the surf... by logfromblammo on Wednesday April 25, 2018 @02:52PM (#16924799)

I presume relative to the solar barycenter, and Wikipedia says that speed is its maximum speed (at perihelion of about 1.3 AU).

For reference, Earth does a mean speed of about 107,000 km/h relative to the solar system's center of mass.

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Re:A one-second video taken by the Rosetta probe on the surf... by z3t4 on Wednesday April 25, 2018 @02:59PM (#16924872)

I guess relative to the stars in the image, using parallax.

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Re:A one-second video taken by the Rosetta probe on the surf... by ars on Wednesday April 25, 2018 @04:38PM (#16925861)

No, relative to the stars it's going a LOT faster than that!

Most likely it's relative to the sun.

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