Universe  ID: 14297

How NASA's Roman Space Telescope Will Rewind the Universe

A new simulation shows how NASA’s Nancy Grace Roman Space Telescope will turn back the cosmic clock, unveiling the evolving universe in ways that have never been possible before when it launches by May 2027. With its ability to rapidly image enormous swaths of space, Roman will help us understand how the universe transformed from a primordial sea of charged particles to the intricate network of vast cosmic structures we see today.

The simulation covers a two-square-degree patch of the sky, which is equivalent to about 10 times the apparent size of a full moon, containing over 5 million galaxies. It’s based on a well-tested galaxy formation model that represents our current understanding of how the universe works. Using an extremely efficient technique, the team can simulate tens of millions of galaxies in less than a day – something that could take years using conventional methods. When Roman launches and begins delivering real data, scientists can compare it to these simulations, putting their models to the ultimate test. That will help unravel galaxy formation physics, dark matter – a mysterious substance observed only through its gravitational effects – and much more.


Scott Wiessinger (KBR Wyle Services, LLC): Producer
Ashley Balzer (ADNET Systems, Inc.): Science Writer
Please give credit for this item to:
NASA's Goddard Space Flight Center. However, individual items should be credited as indicated above.