Harley Katz
ON THE RECORD · 8 verbatim quotes · every quote source-verified
“What's unique about our simulation is that it's the first time we have modeled the enrichment of individual chemical elements from individual stars after the Big Bang, coupled to detailed models for gravity, chemistry, radiation and stellar processes,”
Harley Katz · said date not stated · reported 2026-10-03
Katz highlighted the simulation as the first to model enrichment of individual chemical elements from individual stars after the Big Bang alongside detailed physical models.
“Within those you see an incredible diversity. Some of them are bursting out in star formation, others are dead, others are in the process of dying.”
Harley Katz · said date not stated · reported 2026-10-03
Katz noted the incredible diversity among the simulated subsystems, with some forming stars, others dead, and others dying.
“For the first time, we can directly predict what the early Milky Way would have looked like to telescopes like Hubble or the James Webb Space Telescope.”
Harley Katz · said date not stated · reported 2026-10-03
Katz explained that the simulations can for the first time predict what the early Milky Way would look like to telescopes like Hubble or James Webb.
“We follow thousands of subsystems in the model and directly compute what they all would have looked like with our most powerful space telescopes, which is many orders of magnitude more than what had been simulated before,”
Harley Katz · said date not stated · reported 2026-10-03
Katz described how the model follows thousands of subsystems and computes their appearance to powerful space telescopes.
“Essentially, we put in all of the physics we think is relevant—gravity, hydrodynamics, radiation, chemistry, etc.—and then let it evolve and see if it reproduces what we actually see when we look around us today,”
Harley Katz · said date not stated · reported 2026-10-03
Katz described how the simulation incorporates known physics and evolves it to see if it reproduces present-day observations.
“But there are also things we're not getting right, which is interesting too—what are the parts we're still missing? That can lead you into new directions and new questions.”
Harley Katz · said date not stated · reported 2026-10-03
Katz acknowledged that aspects the simulation does not reproduce correctly can lead to new research directions and questions.
“Looking at these results, it's very clear that the physics happening right after the Big Bang has a direct impact on what we see today in the local universe,”
Harley Katz · said date not stated · reported 2026-10-03
Katz stated that physics from right after the Big Bang directly impacts what is observed today in the local universe.
“What does the Milky Way look like at what we call cosmic dawn?”
Harley Katz · said date not stated · reported 2026-10-03
Katz posed the question as part of describing the MEGATRON simulation project's goal of predicting the early Milky Way's appearance.