Adam Smercina et al 2023 ApJL 949 L37

The “Evil Eye” Galaxy, Messier 64, has an unusual outer gas disk that rotates in the opposite direction from the galaxy’s stars; new data show that the galaxy is nearing the end of a merger.

Isabella L. Trierweiler et al 2023 Planet. Sci. J. 4 136

By studying the compositions of white dwarf stars that have consumed planets that once orbited them, researchers have shown that these planets are consistent with containing chondritic material.

Tiger Yu-Yang Hsiao et al 2023 ApJL 949 L34

New JWST observations of a bright galaxy originally discovered with the Hubble Space Telescope reveal it to instead be two galaxies, possibly providing evidence for a merger 430 million years after the Big Bang.

Xiangyun Long et al 2023 ApJ 950 76

Observations of a pulsar during a giant outburst suggest that a low X-ray polarization fraction could be typical for all accreting pulsars, not just those in a sub-critical state.

J. Larsson et al 2023 ApJL 949 L27

JWST has provided the first observations of SN 1987A in the 1–5 micron range; these observations show that the reverse shock may have started to interact with the innermost ejecta.

Qiliang Fang and Keiichi Maeda 2023 ApJ 949 93

Helium-rich and helium-poor supernovae seem to exhibit the same relationship between the energy of their explosions and the mass of the progenitor star, suggesting that they have the same explosion mechanism.