Colloquium

Over the past decade, deep infrared images have pushed the cosmic frontier back to just 500 million years after the Big Bang, delivering the first large sample of galaxies at redshifts 7<z<10.  Sometime in this redshift window the hydrogen in the intergalactic medium transitioned from mostl

The building blocks of the known Universe are stars.

Gravity waves are low frequency fluid oscillations restored by buoyancy forces in planetary and stellar interiors. Despite their ubiquity, the importance of gravity waves in evolutionary processes and asteroseismology has only recently been fully appreciated.

I will present results from the wide-field Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS): the resolved stellar halos of two nearby galaxies (the spiral NGC253 and the elliptical Centaurus A, D~3.7 Mpc) are investigated with Magellan/Megacam.

On New Year’s Day in 1925, a young Edwin Hubble released his finding that our universe was far bigger than previously believed. Six years later, in a series of meetings at Mt.