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www.damninteresting.com | ||
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starkeycomics.com
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| | | | | A brief history of the 30 or so objects in our solar system that have been considered planets at some point. While the planets themselves may seem constant and timeless, the way we define the term "planet" has changed drastically over the centuries. Here's my timeline of all the objects considered planets in our solar [...] | |
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blogs.egu.eu
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| | | | | A blog hosted by the European Geosciences Union | |
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www.livescience.com
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| | | | | We worked out how many trips each of the solar system's eight planets has taken around the sun over the past 4.6 billion years. | |
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blogs.nasa.gov
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