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Cosmology

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Can dark matter interact with itself?

The nature of dark matter, the invisible matter that holds galaxies together, still evades scientists almost a century after first inferring its existence. Since we cannot observe dark matter directly, like we can detect a star through the light it emits, astrophysicists study how its... click to read more

Views 2248
Reading time 3 min
published on May 10, 2023
The stars that time forgot remember the youth of our Milky Way

How did galaxies, like our own Milky Way, arise from the featureless universe after the Big Bang? Through a lot of astronomical detective work, we now know that galaxies expand through consuming smaller systems, tearing them apart through their gravitational forces and assimilating their stars.... click to read more

  • Geraint F. Lewis | Professor at Sydney Institute for Astronomy, School of Physics, The University of Sydney, Sydney, Australia
Views 3110
Reading time 4 min
published on Mar 12, 2021