We're accustomed to astronomical telescopes going over budget and taking longer than planned to complete and launch. The JWST's long struggle to completion is the most recent example of that. But NASA's next space telescope, the Nancy Grace Roman Space Telescope is bucking that trend. The telescope is ahead of schedule and under budget, an uncommon accomplishment for advanced telescopes. It's due to launch in September, months ahead of schedule, and once it reaches its home at the Sun-Earth L 2 point, it'll go through some testing and calibration, then it'll get to work. The Roman's mission is centered around surveys, and one of them is the Galactic Bulge Time Domain Survey (GBTDS), which will last 15 months. The Galactic Bulge is a bulbous region around the Milky Way's center that's tightly packed with stars and planets. It's also home to free floating objects like rogue planets, and other objects like isolated stellar-mass black holes.…