Charting the dark cosmic web: where DESI and imaging surveys intersect
by Jamie McCullough (Feb 25, 2025)Cosmological measurements often make use of sophisticated concepts that depart from the everyday. Here we visualize several of the concepts involved in plans to measure the distribution of dark matter in the universe and probe the growth of cosmic structure over time ...
Cosmic wrestling match
Communications and Media Relations at LMU (Jul 4, 2024)An LMU team has furnished a model for revealing what the color of a galaxy tells about its distance, to be used for measuring cosmic structures ...
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How old is that galaxy, really? Constraining the color-redshift relation with DESI
by Katherine Lee (Oct 2, 2023)You’re probably familiar with the idea that when astronomers use telescopes like Hubble, JWST, and ALMA to study faraway objects, we’re actually looking back in time! The light we see has taken millions or billions of years to travel ...
How to tease out the tiniest distortions of galaxy shapes to probe the secrets of the Universe
by Jamie McCullough (Jan 5, 2022)When we look up at the sky with telescopes, we see myriads of galaxies of differing sizes and morphologies (shapes). Galaxies on a large scale seem to be distributed uniformly, but on smaller scales get bound up into what is generally called "large scale structure" —enormous filaments of matter that have clumped together as the Universe evolves ...