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Muhammad Akashi and Noam Soker 2021 ApJ 913 91

New 3D hydrodynamical simulations show that jets that precede the ejection of the main planetary nebula shell can form the morphological feature of ears, protrusions seen in a small fraction of these nebulae.

Stefan E. Schröder et al 2021 Planet. Sci. J. 2 111

Boulders on Ceres are more numerous toward high latitudes and have a maximum lifetime of 150 ± 50 Ma, based on crater counts, suggesting that they are mechanically weaker than the boulders on asteroid (4) Vesta.

S. Poolakkil et al 2021 ApJ 913 60

Systematic spectral analyses are presented of gamma-ray bursts detected by the Fermi Gamma-Ray Burst Monitor during its first ten years of operation, resulting in a compendium of over 18,000 spectra.

Natalia M. Guerrero et al 2021 ApJS 254 39

2,241 exoplanet candidates have been identified with data from the Transiting Exoplanet Survey Satellite (TESS) during its 2-yr Prime Mission, including a large number of small candidates well-suited for followup.

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