This year’s Rosseland Lecture was held by Anja C. Andersen, associate Professor at Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen.
Dust grains are found everywhere in the space between the stars in galaxies. They are responsible for the formation of molecular hydrogen and for absorbing and re-emitting about 50% of the energy from all galaxies, as well as providing an effective coolant for star formation. Although important in various astrophysical processes, the origin and consequently the chemical make-up and emission properties of dust grains is largely unknown. Dust is generally believed to form in the atmospheres of low/intermediate-mass stars late in life, but there is growing evidence that dust may also be formed in the explosions of massive stars and/or be accreted in large amounts in the interstellar medium.
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