Overview
SPHEREx, the first space-based all-sky infrared spectrophotometer, is on the verge of completing its map of the celestial sphere. To the detriment of the cosmologists, the images are full of bright stars. SPHEREx records information-rich spectra of tens of millions of nearby cool stars at 102 new wavelengths, probing spooky molecular and continuum absorption features at an unprecedented statistical scale. Red dwarfs account for 75% of all stars, yet their atmospheres are famously hard to model, with state-of-the-art models failing to fit their strange valleys of water and titanium. Magnetic fields and clouds may be involved. In this talk, I will show several facets of stellar science with SPHEREx, from spectral extraction and model fitting to brown dwarf characterization and discovery. I will share my tips for handling the data to acquaint the audience with the telescope's capabilities and idiosyncrasies. Finally, I will speculate on how SPHEREx will help us better understand the faint dwarfs haunting the dark void ...and our models.