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The Webb Telescope Further Deepens the Biggest Controversy in Cosmology
A long-awaited study of the cosmic expansion rate suggests that when it comes to the Hubble tension, cosmologists are still missing something.
Tracing the Hidden Hand of Magnetism in the Galaxy
Susan Clark is helping to unravel the mysterious workings of the Milky Way’s magnetic field, a critical missing piece of the galactic puzzle.
How the Ancient Art of Eclipse Prediction Became an Exact Science
The timing of the total eclipse on April 8, 2024, will be known to within a second, thousands of years after fearful humans first started trying to anticipate these cosmic events.
Doubts Grow About the Biosignature Approach to Alien-Hunting
Recent controversies bode ill for the effort to detect life on other planets by analyzing the gases in their atmospheres.
To See Black Holes in Stunning Detail, She Uses ‘Echoes’ Like a Bat
The astrophysicist Erin Kara measures time lags in black holes’ X-ray glows, which reveal the complexity of the objects’ closest surroundings.
Radio Maps May Reveal the Universe’s Biggest Magnetic Fields
A controversial technique has produced detailed maps of the magnetic fields in colossal galaxy clusters. If confirmed, the approach could be used to reveal where cosmic magnetic fields come from.
In a ‘Dark Dimension,’ Physicists Search for the Universe’s Missing Matter
An idea derived from string theory suggests that dark matter is hiding in a (relatively) large extra dimension. The theory makes testable predictions that physicists are investigating now.
The Best Neighborhoods for Starting a Life in the Galaxy
Some neighborhoods in the Milky Way may be better suited for making habitable planets than others.
Clashing Cosmic Numbers Challenge Our Best Theory of the Universe
As measurements of distant stars and galaxies become more precise, cosmologists are struggling to make sense of sparring values.