Giant star ι Draconis is known to host a planet with a 511-day orbit, but careful measurements of its subtle oscillations that constrained its radius, mass, and age also revealed a second planet with an orbital period of 68 years.

High-resolution imaging reveals previously unknown, short-lived, small-scale disturbances in post-starburst galaxies, which suggests that most — if not all — post-starburst galaxies resulted from galactic mergers.

Simulations explore the formation of glycolonitrile, which might be an important precursor of the amino acid glycine as well as adenine, a component of DNA, in interstellar chemistry.

Rapidly accreting stars in the early universe might produce unique spectral features that will be observable by the James Webb Space Telescope, even as far back as a redshift of 10-13.

Improved statistical modeling suggests that the creation of Mars’s alluvial fans — triangular deposits of sediment and debris — potentially proceeded until ~2.5 billion years ago, well into the Amazonian Period.

High-resolution simulations suggest that the act of capturing a satellite galaxy on an eccentric orbit can substantially alter the dark-matter profile of a galaxy, causing it to transition from “cusp-like” to “core-like.”