In every planet-forming disk there's a point where the heat from a host star needed to keep H2O molecules as vapor peters out, and the H2O be becomes a solid crystal. This is the snow line, and it looms large in most theories of planet formation. Most broadly, planets formed inside the snow line will …
Rethinking The Snow Line
In every planet-forming disk there's a point where the heat from a host star needed to keep H2O molecules as vapor peters out, and the H2O be becomes a solid crystal. This is the snow line, and it looms large in most theories of planet formation. Most broadly, planets formed inside the snow line will …
Big Bangs
What can get the imagination into super-drive more quickly than the crashing of really huge objects? Like when a Mars-sized planet did a head-on into the Earth and, the scientific consensus says, created the moon. Or when a potentially dinosaur-exterminating asteroid heads towards Earth, or when what are now called "near-Earth objects" seems to be …
Big Bangs
What can get the imagination into super-drive more quickly than the crashing of really huge objects? Like when a Mars-sized planet did a head-on into the Earth and, the scientific consensus says, created the moon. Or when a potentially dinosaur-exterminating asteroid heads towards Earth, or when what are now called "near-Earth objects" seems to be …
Many Worlds 