Updates to the Maunakea Spectroscopic Explorer: thousands of fibers, infinite possibilities

MSE is a massively multiplexed spectroscopic survey facility that will replace the Canada-France-Hawaii-Telescope in the coming decade. This 12-m plus telescope, with its 1.5-2.0 square degree field-of-view, will observe 18,720 astronomical targets at every pointing with nominal specifications including: wavelength range equal to 360 nm through 1.8 microns (H-band); low/moderate resolution (R=3,000/7,000) or high resolution (R=30,000). MSE will contribute to nearly every field of astrophysics across all spatial scales, from individual stars to the largest scale structures in the Universe, including (i) the ultimate Gaia follow-up facility for understanding the chemistry and dynamics of the Milky Way, including the outer disk and faint stellar halo (ii) galaxy formation and evolution at cosmic noon, (iii) derivation of the mass of the neutrino and insights into inflationary physics through a cosmological redshift survey that probes a large volume of the Universe. The instrument suite, dedicated to large-scale surveys, will enable MSE to collect massive data, equivalent to a full SDSS Legacy Survey every several weeks. We present an update to the MSE specifications, requirements and technology.