evolved stars

The Discovery of a Hot Neptune that Shouldn’t Exist

1800 light-years away, an unlikely survivor orbits an aged star. This rare planet is called a hot Neptune, and it's…

1 year ago

A Second Generation of Planets can Form Around a Dying Star

When young stars coalesce out of a cloud of molecular hydrogen, a disk of leftover material called a protoplanetary disk…

2 years ago