Jonathan R. Trump et al 2023 ApJ 945 35

JWST continues to revolutionize every field it touches, this time giving researchers an entirely new view of the conditions within the interstellar medium of galaxies in the first billion years of the universe.

Tathagata Pal et al 2023 ApJS 266 41

A catalog of flux-corrected and de-reddened spectra of 513 stars allows for simultaneous study of H-alpha and the 280-nanometer magnesium line, both of which indicate chromospheric activity.

Eros Vanzella et al 2023 ApJ 945 53

Massive young star clusters identified in JWST observations of a highly lensed galaxy might be the precursors to the metal-poor globular clusters seen in the universe today.

Jae-Woo Lee 2023 ApJL 948 L16

Research continues to show that seemingly simple globular clusters are actually composed of multiple populations of stars, as is the case for Messier 92, which contains a centrally concentrated metal-poor population.

Xi-Hong Luo et al 2023 ApJS 266 16

Pulsars — rapidly spinning cores of exploded stars — are the best timepieces in the universe, and their regular pulses can be used to aid in spacecraft navigation.

Erin E. Flowers and Christopher F. Chyba 2023 Planet. Sci. J. 4 127

Laboratory experiments and simulations suggest that meteoroids streaking through the thick, nitrogen- and carbon-rich atmosphere of Saturn’s moon Titan can generate a small but significant amount of organic molecules.