As the hot Jupiter HD 80606b passes within 0.03 au of its host star, its spectrum transforms from a featureless blackbody to one with visible spectral features of water, methane, and other molecules.

A new framework successfully mitigates observational noise, inverts even large fields of view in a memory-efficient way, and can resolve small-scale features in regions with strong or weak magnetic fields.

Using a recent nearby supernova as an example, researchers have shown that cosmic rays can be produced as the supernova collides with dense circumstellar material, with a production efficiency of 10%.

If KM3-230213A arose from the interaction of an ultra-high-energy cosmic ray with the photon or matter background, the discovery is in (potentially resolvable) tension with existing cosmic-ray observations.

New information revealed about a new class of variable stars: they are evolved objects with periods of 3–75 minutes, with similar surface gravities and effective temperatures, but some differences in helium abundance.

Using N-body simulations, researchers examine the outcomes of planetesimal growth in protoplanetary disks in which planetesimals are clustered within rings rather than distributed evenly throughout the disk.