No immediate plausibility issues with this picture, since the speedometer says 0.8c. Getting it to go past 1.0c is where things start getting a little tricky. Credit: NASA.
The recent list of Universe Today’s Top 10 Stories of 2010 included the story Faster than Light Pulsars Discovered – which on further reading made it clear that the phenomenon being studied wasn’t exactly moving faster than light.
Anyhow, this prompted me to look up different ways in which apparent superluminal motion might be generated, partly to reassure myself that the bottom hadn’t fallen out of relativity physics and partly to see if these things could be adequately explained in plain English. Here goes… (…) Read the rest of Astronomy Without A Telescope – Apparent Superluminal Motion (986 words)
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(C) Steve Nerlich for Universe Today, 2011. | Permalink | 2 comments | Add to del.icio.us Post
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