We also released the 2nd half sky catalogue of the eROSITA X-ray survey at the same time, for 1.5 years of operations, in collaboration with SDSS. Here is a sky map and 3D plot with redshift: https://www.mpe.mpg.de/8215311/news20260731

This almost doubled the number of known X-ray sources to 2 million.

The number of massive maps of the universe in recent years are absoultely fascinating, and have reignited my childhood interest in astronomy and cosmology.

These maps consist of a large number of statistical observations derived from images, and that lines up with all the data analysis I've used in the past decades in genomics. (Most DNA sequencing data comes from image analysis, coincidentally!). And the plots I see in these papers are looking increasingly like the plots I've produced over the past 20 years, so I'm thinking maybe it would be fun to download a few TB of atlas and see if I can reproduce their plots...

Thanks for everyone who works in this field, it's fantastic work that's reshaping our very understanding of reality.

I tend to assume that the obvious gridded point pattern is a sky sampling artifact - but it would be far more interesting if it's a real thing.

What are the "gridded" regions in the middle? Is that some kind of measurement artifact?

Anyone ever worked with data from SDSS? What have you done with it? I imagine it's a gold mine for university students. I took an astronomy class and was able to plot the largest structures in the universe from their data, which was cool but pretty basic. I've loved astronomy all my life and I've always wondered if there was anything more one person or a small team could do with SDSS data. I took the class in 2010 so I imagine there are more possibilities now with AI?

Interesting how anisotropic it is. Naively I would have assumed it would be roughly symmetrical

Is the distribution because of taking time to look/equipment? or is that actually related to the distribution (clumps in various directions).. I would guess the lines and things are "that's where we've looked" vs. "that's all there is".. I wonder if it's gonna line up with the CBR.

Perhaps including one that is scooting across the universe (Dr Becky): https://www.youtube.com/watch?v=EHLF6sgLdrs&t=4s

if they used X-Rays for that, why does Event Horizon Telescope use millimeter waves?

Thanks, now I know where not to go