The ALPHA experiment (no relation) at the CERN antiproton decelerator has just published the first measurement of the Lyman-alpha lines of anti-hydrogen (a positron bound to an antiproton)¹.
There is an excellent summary of the measurement here, written by Ana Lopez.
Ana mentions the importance of the Lyman-alpha line to astrophysics. As light of multiple frequencies travels to us from distant objects, it passes through clouds of interstellar and intergalactic hydrogen. The Lyman-alpha energy transition of hydrogen “takes out” various frequencies, depending on the red shift, when a photon of the right energy hits a hydrogen atom and makes the electron jump up the level. There’s a video from Andrew Pontzen above, illustrating how, because of the different red shifts, a single energy transition leads to a “forest” of absorption lines.
The list of speakers was without doubt the most eminent collection of physicists I have ever been a part of. In alphabetical order, and mostly with links to the reasons for their eminence:
Life and Physics 