A potential supermassive black hole so early in the universe’s history would likely have to have been seeded by a black hole 10,000 to 100,000 times the mass of the Sun.
New JWST observations of the famous protoplanetary-disk-hosting protostar HL Tau reveal known disk features in greater detail and help to place limits on possible planets.
Luckily, lunar spiders aren’t real arachnids: researchers suspect that these features mark where the lunar soil has drained into a shallow subsurface void, leaving behind a depression in the surface.
A model–data comparison shows that different cosmic-ray transport models have difference strengths, and which model best matches the measurements depends on the energy, particle type, and other factors.
Spatially unresolved supernovae don’t readily reveal asymmetries in the exploding star, but some properties, like the observed cooling frequency, can be used to deduce the presence of these asymmetries.
Analysis of more than 10 years of data led to the discovery of the Milky Way’s first ultra-long-period classical Cepheid variable star, whose pulsations require 78 days to complete.