Carwajalca comments on Harry Potter and the Methods of Rationality discussion thread, part 16, chapter 85 - Less Wrong

9 Post author: FAWS 18 April 2012 02:30AM

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Comment author: Gastogh 26 April 2012 05:46:56PM 11 points [-]

As of February 8, 2012, sunlight takes 11.9 hours to get to Pioneer 11 at its approximate distance. (Wikipedia)

It's been on its way since April 1973 (for right about 39 years), so assuming a steady speed, it would've passed the six-hour limit roughly 19,5 years ago, or in late 1992.

Comment author: Carwajalca 18 July 2013 07:59:02AM 0 points [-]

Pioneer 11 is moving at a speed of 11.4km/s relative to the Sun. The Earth's orbital speed is around 30km/s. Hence it's possible that the Earth-Pioneer distance increases to over six hours for a while and then drops again.