By the time a star becomes a white dwarf, much of its mass will have been lost. When does this mass loss occur and what drives it? Read today’s astrobite to find out.
NN Serpentis has everything: a white dwarf + main sequence binary system that is believed to contain two planets and, now, a disc of debris.
White dwarf stars are the final evolutionary state of most stars. They are everywhere in the Galaxy and are relatively easy to model. So can we learn about our Galaxy solely by studying them? The authors of today’s paper show us a way.
Image credits: ESO/Y. Beletsky.
When stars move on to their final stages of life, the habitable zone around them moves outward, putting planets like Jupiter and Saturn into the habitable zone. Do these outer planets have enough time to develop life before the star dies?
Deep imaging of a nearby dwarf galaxy reveals a new globular cluster.
Stars and gas waltz across galactic nuclei as star formation proceeds. Let’s see how well they dance!