Solar System Is Weird Only if It Is Old
March 14, 2016
To someone who believes the solar system is billions of years old, no wonder its contents look weird.
Surprising Youth in the Solar System
January 26, 2016
Four solar system objects in the news look young, not billions of years old.
Want Salt on Your Ceres?
December 10, 2015
Those mysterious white spots on asteroid Ceres could be outcrops of salt. How did vast amounts of salt get out there?
Pounding Headaches for Solar System Dates
October 19, 2015
It's hard to tell when things crashed into each other.
Seriously, Ceres and Comets Look Surprising
August 5, 2015
Here are surprises found at asteroid Ceres and Comet 67P by spacecraft arriving there this year.
Solar System Puzzles Needing Explanation
June 11, 2015
Here are some of the latest observations that are baffling planetary scientists.
It's Curtains for Enceladus
May 11, 2015
The geysers of Saturn's little moon are like sheets instead of jets, spelling trouble for theories of its ancient age and possible life.
Water Worlds Tempt with Life, Not Youth
March 13, 2015
More and more planets and moons are suspected of having liquid water, but what should be the logical implications?
Solar System Reversals
February 9, 2015
The planets keep going around, but theories about them often stop and go backward or sideways. When nothing else works, send in the impactors!
Mercury, Moon May Still Be Erupting
October 17, 2014
Two objects that should be old and dead show surprising activity. Other indications of youthfulness in the solar system are noted.
Another Geyser World Erupts: Asteroid Ceres
January 23, 2014
The asteroid Ceres is popping off with water vapor on two sides. What's that world coming to? One thing is sure: DAWN is coming to it.
October 28, 2011
Members of our solar system that were little more than points of light for decades or centuries have now become familiar family members, seen up close and personal by spacecraft. Here are introductions to three worlds that are no longer mere names in a catalog. Even the names of members in this trio may be unfamiliar to some. They’re worth getting to know.