Fluffballs in Space Shouldn't Exist
August 18, 2014
A rubble-pile asteroid has such low density it should have disintegrated, but it's doing just fine.
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Start Over: The Evolution of Planets Is All Wrong
July 5, 2014
Ideas about planetary evolution are so far off base with observations of exoplanets, it's time to wipe the slate clean.
Cosmos Does Not Look Evolutionary
September 14, 2013
Evidence continues to mount that the universe and its contents appeared mature from the beginning.
Is Star Formation Understood?
February 22, 2011
Astronomers often speak with apparent confidence about regions of active star formation in nebulae or galaxies. A look at the fine print, however, shows plenty of wiggle room when observations don’t quite match theory.