Planetary Cookie Doughs at High Angular Resolution
On the third day of Christmas the ALMA gave to me, 20 highly resolved protoplanetary disks!
How can you tell if a young planet is migrating?
It is difficult to tell if planets embedded in their natal protoplanetary disks are migrating closer to their stars. The authors of today’s paper devise a new observational signature to figure that out.
How can planets be heavier than the disks that formed them?
Planets form from protoplanetary disks. How they can be heavier on average than the disks is questioning our theories of planet formation.
Stealing from the Solar System: the Effects of a Stellar Fly-By
Steep density drop-offs and orbits with high inclinations and eccentricities are just a few of the mysterious features in the outer reaches of our Solar System – can a single stellar fly-by help explain all of them?
Have we been hit by a supernova?
Today’s paper describes models of what a nearby supernova would do to a young planetary system, and looks at whether the same may have happened to our own solar system.
The Planets in the Gaps
We’ve strongly suspected they’re there. A new method promises to prove it.