On its 100th day, eROSITA reaches its destination orbit after the last maneuver of Spektrum-RG. What a journey! Everything is ready for unveiling the first eROSITA images tomorrow.

eFEDS is one of the eROSITA Performance Verification survey fields. We observed about 120 square degrees to the full all sky survey depth. A great opportunity for early collaborations with Sloan Digital Sky Surveys, Hyper Suprime-Cam, #ASKAP, #GAMA etc. Let the science begin!

Brexiteers when they eventually realise what they voted for x.com/_TheBestDogs/s…

You wanna know how astronomers map the cosmos? Watch this talk by Dr Florian Pacaud! #AstroOnTap #Bonn #Astronomy youtube.com/watch?v=oMBvPz…

Astronomy, meet Starlink again. This is pretty wild. Gif source: spaceweather.com/archive.php?vi…

"High-redshift galaxy groups as seen by Athena X-ray observatory ESA Athena / WFI" arxiv.org/abs/2008.09271 "Athena can detect ∼20 high-z galaxy groups with masses of M_500≥ 5×10^13 M⊙ and z≥2, and almost half of them will have a gas temperature determined to a precision of ΔT/T≤25%"

#eROSITAdventCalendar Day 16: SRG/#eROSITA completes its second all-sky survey. Six more months of operations, a second X-ray scan of the entire sky is completed! This new all-sky picture will be used, in combination with the first one, to explore in greater detail the X-ray sky.

As part of the early eROSITA paper, we released today arxiv.org/abs/2012.08775 by Brüggen et al.: Radio observations of the merging galaxy cluster system A 3391-A3395 Duy Hoang Annalisa Jeremy Sanders Prof. Melanie J-H CSIRO_ATNF UHH - MIN-Fakultät Florian Pacaud @dresrabulbul

what happens when galaxy clusters are en route to collide? check out Abell 3391/95 and the new papers out today! X-ray eROSITA (Reiprich et al. arxiv.org/abs/2012.08491) & radio EMU ASKAP (Brüggen et al. arxiv.org/abs/2012.08775) @ThomasReiprich eROSITA @[email protected]

Our new cluster anisotropies paper is out today! We use 10 scaling relations to see if H0 looks isotropic locally or if there are strong bulk flows. We find an apparent 9% spatial change in H0, or equivalently, a 900 km/s bulk flow out to 500 Mpc... (1/n) arxiv.org/abs/2103.13904

This packed ESA/Hubble Picture of the Week showcases a menagerie of galaxies: the galaxy cluster ACO S 295 and a jostling crowd of background galaxies and foreground stars. Credit: @ESA / @Hubble_Space / NASA , F. Pacaud, D. Coe orlo.uk/fG6vJ

📷 This NASA/ESA HUBBLE Telescope image shows galaxy cluster ACO S 295, as well as a crowd of background galaxies and foreground stars. Please take a moment and read that again, 'background GALAXIES'! Hundreds of them, each billions of stars 😮👉 esahubble.org/images/potw212…

Each of those is an entire galaxy, with hundreds of billions of stars. Have some humility. Hubble bit.ly/2QTj5Zb

Registration for our school is open! Luca Amendola: Dark Energy Florian Pacaud: Galaxy Clusters Emille Ishida: Data Inference & ML Marek Lewicki: Testing Fundamental Physics with GW see indico.physi.uni-heidelberg.de/e/tonale24 #WSCtonale #cosmology #astronomy #passodeltonale

❄️ Engaging discussion on galaxy cluster during the Tonale WS working groups with Florian Pacaud ! #WSCtonale #GalaxyCuster #Astrophysics #Cosmology

📢Paper and press releases day! We report the first-ever unambiguous detection of WHIM/missing baryons in a single cosmic filament using ESA XMM-Newton and JAXA(Japan Aerospace Exploration Agency) Suzaku data! It's the first time observations agree with LCDM simulations for the nature of WHIM aanda.org/component/cont…

Charb dans le Charlie Hebdo de la semaine.