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Astrophysicist Katherine Freese describes mysterious dark matter, how she became interested in the subject, and why more women should get into astrophysics.

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More to explore

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Galaxy NGC1052-DF2
A Dark Matter-Less Galaxy
A new discovery has given astronomers a glimpse of a galaxy that seems to be free of dark matter.
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Courtesy of the Institute of Advanced Study and Dana Berry.

The locations of fourteen millisecond pulsars within a few thousand light years of the Sun, used like cosmic accelerometers to measure the amount of dark matter in the Milky Way. (Courtesy of the Institute of Advanced Study and Dana Berry.)

Keeping Time to a Chaotic Universe
How can astronomers use naturally occurring precision clocks to search for invisible phenomena in our universe?
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ESO/L. Calçada

Schematic representation of rotating disc galaxies in the early Universe (right) and the present day (left). Observations with ESO's Very Large Telescope suggest that such massive star-forming disc galaxies in the early Universe were less influenced by dark matter (shown in red), as it was less concentrated.

The Dark Is Rising
Galaxies far, far away have less dark matter than galaxies nearby…

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