Bringing Galileo’s Sunspots into the 21st Century
Astronomers have drawn detailed maps of dark spots on the Sun’s surface for hundreds of years. Can computers help us to bridge between historical and modern datasets?
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How to Get Water on the Moon
Without a resupply source, the Moon’s surface water would vanish. What’s keeping it hydrated?
The Signature of a Pre-Merger System
Could pairs of black holes and neutron stars alert us to their existence before they merge?
Searching for Star Fuel
How has the availability of star-forming material in galaxies changed with time?
What Galaxies Reveal About Magnetars and Fast Radio Bursts
Recent evidence points to highly magnetized neutron stars as the culprits that produce fast radio bursts — but do galaxy demographics support this picture?
Peering at the Surface of a Nearby Moon
Among Jupiter’s Galilean moons, icy Europa or volcanic Io often take the spotlight — but their sibling moon Ganymede has plenty of secrets to share.
A New Assessment of Supermassive Black Holes and Our Universe
A recent census of brightly accreting supermassive black holes reveals more about the role they played in the evolution of our universe.
Holding the System of HR 8799 Together
What does the future hold for the multiplanetary system of HR 8799 — can it remain stable?
Measuring Solar Eruptions with a Rare Alignment
In 1998, a mass of plasma erupted from the Sun. Data from two perfectly aligned spacecraft now tell its story.
Warning: Neutron Star Collision Imminent
Could we alert follow-up telescopes to a neutron star collision even before the merger happens?