Image credits, left to right: [1] Art: Measuring mistakes by Ulrike Kuchner. Lapel pin: CepheidStudio. [2] EROJ003707+0909.5, aka the space-invader. [3] Mapping dark matter with gravitational lensing. [4] Searching for gravitationally lensed gravitational waves.
The best way to reach me is via email at gps [AT] star.sr.bham.ac.uk or graham [AT] grahamsmithastro.com.