Astrophiz 20: Black Hole Echoes with Natalia Sommer - News + the Astrophotography Challenge

Black Hole Investigator and Norwegian-born PhD candidate Natalia Sommer explains her novel technique of interrogating the echoes from active galactic nuclei to develop a standardisable candle to measure the distances to galaxies far far away. Dr Nadezhda Cherbakov Skypes in from Tver in Russia to tell us about Red Shift, Blue Shift and the Doppler Effect. In the News: Fast Radio Bursts and the oldest woman in space and most travelled NASA astronaut Peggy Whitson. What to look for in the night sky this week, the ecliptic explained and the Astrophotography Challenge.