Planet Party Busted by Triton
November 16, 2017
Theories can be like parties with tantalizing speculations until big, whopping anomalies spoil the fun.
Cassini Gets Higher Look at Saturn's Youth
December 10, 2016
Now entering its final dramatic high orbits, the Cassini spacecraft is finding unexpected things for an assumed old planet.
Solar System Puzzles Needing Explanation
June 11, 2015
Here are some of the latest observations that are baffling planetary scientists.
Moon's Stabilizing Influence Depends on Star Size
October 15, 2014
A connection between multiple factors was noted in a recent model of how a moon helps a planet remain habitable.
Bimbo Eruptions in the Solar System
April 6, 2013
Planetary origin theories come across as popular and charismatic, till some little moon pops off and says, "Yoo-hoo! Remember me?"
Astronomy Grab Bag
December 29, 2012
For year's end, here's a clean-out of astronomy articles—from planetary science to cosmology—to motivate further inquiry.
Are Saturn’s Rings Evolving?
July 10, 2010
Can ring particles grow into moons? And is that how planets grew from rings around stars?