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David S. Aguado et al 2018 ApJL 854 L34

The primitive star SDSS J0023+0307 has an upper limit [Fe/H] < −6.6, making it one of the two most iron-poor stars known. It is further missing the usual carbon enhancement found in other hyper-metal-poor stars.

L. Molnár et al 2018 ApJS 234 37

In the field of view surrounding Uranus, 608 main-belt asteroids were observed with K2. The resulting light curves revealed rotation rates for 90 of these asteroids (86 of which were previously unknown).

Marian Karlický et al 2018 ApJL 854 L29

A rare slow, positively drifting radio burst observed on the Sun in 2015 November may have been generated by a thermal conduction front formed in front of a falling, hot, extreme-ultraviolet blob of plasma.

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