Have you checked the assumptions and approximations of your favorite stellar evolution code? In today’s paper we confront these uncertainties and face the fact that, well, stellar evolution is extremely complicated and we need to keep tabs of the limitations of our models.
Interstellar space should be littered with debris ejected during the formation of planetary systems—but how much? Engelhardt et al. use solar system surveys and simulations to place an upper limit on the number density of asteroids and comets roaming the Milky Way without a parent star.
Fomalhaut (a.k.a. the Eye of Sauron) has a dusty disk around it and an intriguing speck of light near the edge of the disk. But we don’t exactly know the nature of this object: Could it be… a neutron star?
How an artificial neural network can be trained to classify stars into spectral types, using only a single broad-band image.
A star that spins fast enough to throw off its atmosphere, and a hint at how it got that way.
Planetary nebulae where they shouldn’t be–how did they get there?