Volcanoes that spew stretchy ice could make dwarf planets bright
20 October 2017
Something strange is happening on dwarf planets Eris and Makemake. They’re tiny and cold, but they still show surprising signs of geologic activity, like real planets
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Premium
Our sun probably didn’t steal Planet Nine from outer space
11 September 2017
If there is a Planet Nine lurking in the outer reaches of our solar system, it was probably born close to the sun rather than snatched up from afar
Earth may have been born in a huge flare-up of the young sun
8 May 2017
A sudden brightening of the infant sun – called an FU Orionis outburst – could have melted dust grains and made them stick together, building our world
