Selections from 2019: An Average Quasar at an Above-Average Distance
The discovery of an extremely distant supermassive black hole can teach us about conditions in the early universe.
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Selections from 2019: Rethinking Carbon Monoxide in the Search for Life
What does the presence of carbon monoxide in an exoplanet’s atmosphere tell us in the context of the search for life beyond Earth?
Selections from 2019: Explanation for an Interstellar Visitor
Interstellar asteroid ‘Oumuamua may be part of a larger population of bodies with unusual structure.
Selections from 2019: A Giant Planet Around an Evolved Binary
Evidence has been found for a giant planet orbiting around a binary that consists of one dead and one living star.
Selections from 2019: Neutrinos and Gravitational Waves from Cosmic Catastrophes
Some astrophysical sources should produce both neutrinos and gravitational waves. What have we learned looking for this simultaneous signal?
AAS Publishing News: The Unified Astronomy Thesaurus
Noticed a change in AAS journal keywords? Here’s why we’re using a new system, and what it could do for the field.