View Full Version : What is an Astronomical Unit?

2017-Mar-28, 01:10 PM
When it comes to dealing with the cosmos, we humans like to couch things in familiar terms. When examining exoplanets, we classify them based on their similarities to the planets in our own Solar System – i.e. terrestrial, gas giant, Earth-size, Jupiter-sized, Neptune-sized, etc. And when measuring astronomical distances, we do much the same. For […]
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2017-Mar-31, 06:21 PM
An even 500 light seconds might have been more useful.