All-Sky Near Infrared Space Astrometry.

Gaia is currently revolutionizing modern astronomy. However, much of the Galactic plane, center and the spiral arm regions are obscured by interstellar extinction, rendering them inaccessible because Gaia is an optical instrument. An all-sky near infrared (NIR) space observatoryoperating in the optical NIR, separated in time from the original Gaia would provide microarcsecond NIR astrometryand millimag photometry to penetrate obscured regions unraveling the internal dynamics of the Galaxy.