Monday, September 28
10:00 am - 11:00 am	High Energy Physics Seminar Online Event Two- and three-particle scattering amplitudes from lattice QCD Fernando Romero-López, University of Valencia,
7:30 pm - 9:30 pm	Astronomy on Tap Online Event "The Planet Nine Hypothesis: An Update" and "Mapping our Solar Neighborhood" Konstantin Batygin, Professor of Planetary Science, Division of Geological and Planetary Sciences, Caltech, Jackie Faherty, Senior Scientist, Department of Astrophysics, American Museum of Natural History,

Wednesday, September 30
12:00 pm - 1:00 pm	Logic Seminar Online Event The Borel structure of quotient spaces Ben Miller, Kurt Gödel Research Center, University of Vienna,
3:00 pm - 4:30 pm	Geometric Representation Theory Learning Seminar Online Event Overview and motivation Tamir Hemo, Department of Mathematics, Caltech,
4:00 pm - 5:00 pm	Astronomy Colloquium Online Event The Commensal Radio Astronomy FAST Survey (CRAFTS) Di Li, Chinese Academy of Sciences,

Thursday, October 1
4:00 pm - 5:00 pm	Physics Colloquium Online Event Bootstrapping quantum gravity Thomas Hartman, Cornell University,

Friday, October 2
11:00 am - 12:00 pm	High Energy Theory Seminar Online Event Singularities of thermal correlators at strong coupling Matthew Dodelson, IPMU, University of Tokyo,
2:00 pm - 3:00 pm	TAPIR Seminar Online Event Probing interstellar medium and galaxy evolution with infrared emission lines Shengqi Yang, Graduate Student, The Center for Cosmology and Particle Physics, New York University,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Online Event Concordance invariants from the E(-1) spectral sequence William Ballinger, Department of Mathematics, Princeton University,