Giant planets take too long to form from large planetesimals. Does including much smaller pebbles fix this problem?
Astronomers have found hydrogen contamination in the atmospheres of helium white dwarfs – but where in the world/universe is it coming from?! The authors of today’s astrobite perform statistical tests to see if the source of this pesky hydrogen could be water-bearing rocky bodies out in space.
Materials carousel round and round black holes in the form of accretion disks, which evidence suggests to be larger than theoretical estimate. (Image credit: Double Negative visual effects company)
Measuring exoplanet composition by studying a white dwarf’s atmosphere
What might be causing the accretion rates in newly formed stars to remain so high?