Mastodawn

Euclid svela un vuoto inatteso tra le stelle di NGC 6397

https://fed.brid.gy/r/https://www.galaxyaddicted.it/2026/06/euclid-ngc-6397-vuoto-nane-rosse/

#ESAEuclid was designed to study 'invisible' dark energy. One of the methods is to use the effect of weak gravitational lensing to trace dark matter structures – also invisible in direct images – across cosmic time.

Ahead of its first major data release in November and first cosmology results in 2027, a first example of dark matter structure in the galaxy cluster Abell 2390, made visible with #Euclid data, has been published:

https://www.euclid-ec.org/euclid-starts-seeing-darkness/

#astronomy #ESA #space #cosmology

CJ 4d ago

" #Gaia found the gap [with] stars in the local neighborhood, which are typically younger than stars in globular clusters. Now, the #Euclid team found the exact same [in a 13Gy old cluster.]" What's going on there? Other recent news: Roman Space Telescope is on the way to the launchpad.

RE: https://bsky.app/profile/did:plc:mulpjci2cuglde3nw5g3q3bs/post/3mnfcwdevkx2u

Daniel Fischer 4d ago

#Euclid Early Release Observations – Internal kinematics and the convective-transition gap of NGC 6397, High-precision multiple-pass photometry and astrometry: https://www.aanda.org/articles/aa/pdf/forth/aa60441-26.pdf -> Scientists Surprised to Find Brightness ‘Gap’ in Ancient Star Cluster: https://www.stsci.edu/contents/news-releases/2026/news-2026-405

Euclid Consortium 4d ago

Data from #ESAEuclid uncovered physics deep inside red dwarf stars. Scientists found a 'brightness gap' in #stars of a globular cluster, pointing to structural instability at certain masses.

While #ESA's #Gaia mission had found this process in relatively nearby stars, scientists from @stsci.edu for the first time showed this for a very old globular cluster, observed by #Euclid.

Read the full press release here:

https://www.stsci.edu/contents/news-releases/2026/news-2026-405#section-id-2

#astronomy #space #Euclid #ESA #NASA #STScI

Jim Carey May 31

Astronomy of the Hubble, Webb, Euclid and Other Space Telescopes
Up until Edwin Hubble proved that there are other galaxies in 1923, mankind believed that the Milky Way Galaxy was the entire Universe. The latest in Astronomy revelations from Hubble, Webb, Euclid, Sphere X, Roman, and other new telescopes.
https://youtube.com/playlist?list=PLM1kyOAO_kDaOTkk0zIenHaHGmTUX2mnS&si=Csb5m7qcMqjc_MlE&utm_source=dlvr.it&utm_medium=mastodon
#Astronomy #SpaceTelescopes #WebbTelescope #Euclid #Hubble #Astrophysics #STEM #SpaceExploration #Cosmos

In the Dark May 25

Not in Barcelona…

So much has happened since that it’s hard to believe that just two years ago I was enjoying a sabbatical in Barcelona. I was delighted when it was announced that this year’s Euclid Consortium Meeting would be held there, but when I saw the dates (25th to 29th May) I was worried that the meeting might clash with examining duties. When the examination timetable was published a couple of months ago, that possibility became a reality and I realized that I couldn’t attend. In fact I have an examination to deal with tomorrow, and will be grading the scripts for the rest of the week ahead of the Bank Holiday weekend.

It’s a shame I can’t make the EC meeting because this will be the last one before the first main release of data, DR1, which is scheduled to take place on October 21st this year. I’ve been following progress in the science working group on galaxy clustering via weekly Zoom conferences, but it would have been nice to see what has been going on in the other groups as well as catching up with colleagues in person as opposed to online.

The second data release, DR2 will not happen until March 2029, by which time I will have retired. In fact there will be at most two Euclid Consortium meetings that I can attend – in 2027 and 2028 – and the second of those may be after my retirement. The final data release, DR3, will happen in October 2031.

It’s worth also mentioning that there will be another Quick Release of data, this one from the Euclid Galactic Bulge Survey, on June 24 this year. There will be quite a lot of press activity around that, but I’m not involved in it.

Here is the complete timeline for reference:

I’d like to take this opportunity to wish everyone involved in the Euclid Consortium Meeting an enjoyable and productive time in Barcelona as well as a fun stay in what is truly an amazing city. I’ll be enjoying the beautiful weather in Maynooth (25°C and sunny) while all the participants are slaving over hot cosmology.

#Barcelona #Euclid #EuclidConsortium #EuclidDr1