Dust is a very important element present everywhere in the Universe. In particular, dust attenuation absorbs, scatters and re-emits light. Nevertheless, not much is known on how dust affects light from galaxies at high redshift, since it is difficult to observe them. Mónica Tress, a final-year-PhD explains more about how dust attenuation effects are studied in galaxies far away.
Cosmic rays are rays of energetic particles and radiation, with their composition in our own Galaxy being dominated by protons. Ellis Owen, a final-year PhD student working on cosmic rays, star-formation and galaxy evolution, tells us about his research on them.