The Expansion of the Universe on Another Mode
Certain features of the cosmic microwave background could help us measure how quickly the universe is expanding.
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Addressing a Gap in Our Knowledge of Black Holes
Models suggest that black holes of a certain mass can’t be produced by supernovae. Gravitational-wave signals from black hole mergers can allow us to test this prediction of “missing” black holes.
Cold Horseshoes in Fast Outflows
Scientists have explored how delicate filaments of cold gas form and survive within the hot, fast-moving surroundings of an active galaxy.
Reweighing a Heavy Neutron Star
New observations of a massive neutron star provide clues about these extreme objects’ interiors.
The Hunt for Wandering Black Holes
How can we spot supermassive black holes lurking outside of their galaxies’ centers? These wanderers may not remain lost!
The Aftermath of Neutron Star Mergers
What does the afterglow of a binary neutron star merger look like? Simulations can give us a fairly good approximation.
Tracking Down Diffuse Gamma Rays
The disk of the Milky Way glows in high-energy gamma-ray photons — but where does this diffuse emission come from?
Draining Magnetic Whirlpools Onto Stars
New images reveal the role played by whirling magnetic fields in the shrouded centers of clouds forming baby massive stars.
Getting to Know Our Nearest Neighbors with ALMA
Scientists are using a powerful telescope to hunt for planets in our nearest star system, Alpha Centauri AB.
Filling In the Blanks with Machine Learning
With data from the Gaia satellite and spectroscopic surveys, machine learning can fill in gaps in our knowledge of how stars move.