Birthday girl

Video call with Pippa this evening. She has turned 18 and already back in Groningen. Her day filled with lectures, tutorials and training.
The diagram on the right is a Hertzsprung Russel diagram. As part of her introduction to astronomy subject she had to explain one part of the syllabus to a non astronomer (me). She did a great job and was able to answer all my questions.
So proud of my girl!