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interestingengineering.com | ||
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theconversation.com
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| | | | | In 2006, and after much debate, the International Astronomical Union came up with a new definition for a planet. And for the first time, the term "dwarf planet" was used. | |
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www.nationalgeographic.com
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| | | | | It's been 18 years since Pluto's celestial status was called into question-yet the matter seems far from settled. We asked experts from both sides to make their case. | |
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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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www.space.com
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| | | The latest The moon breaking news, comment, reviews and features from the experts at The Moon Coverage | ||