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This is why we call it the Extremely Large Telescope!

This photo shows the massive structure that will hold the main mirror of our ELT. It was taken when the construction reached an important milestone: for the first time, the telescope’s structure was rotated horizontally by a few centimetres... by hand!

Read more: eso.org/public/images/potw2627…

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📷 ESO/Cimolai

#astrodon #astronomy #astrophysics #space #science #engineering

The image shows the interior of the Extremely Large Telescope. The metallic grey main structure can be seen in the entire picture, with three people standing in front of it, in hard hats and green safety vests. The people are much smaller than the telescope’s structure.

And yet it moves!

www.eso.org
#Space #science #astronomy #astrophysics #engineering #Astrodon

🚨 Beyond the limit 🚨

New ESO study finds that current proposals to launch 1.7+ million satellites into orbit would have devastating consequences for astronomy.

The most extreme proposals come from SpaceX & Reflect Orbital

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📷 F. Kamphues, ESO/M. Kornmesser

#astrodon #astronomy #astrophysics #space #science #environment #pollution

The background of this image shows a starry sky, including the bright lane of the Milky Way. Hundreds of bright streaks cross the sky in different directions, as if scratching the background natural sky behind it. The bottom of the image is occupied by the dark silhouette of a mountainous desert landscape. Atop the mountain at the centre, is a small, distant metallic dome and yellow-orange lasers shine behind it.
#Space #Environment #science #astronomy #astrophysics #pollution #Astrodon

We are all stardust.

The oxygen you breath? That comes from dying massive stars, ending their life in a supernova.

The iron in your blood? Some from massive stars dying, but mainly fron white dwarfs, the leftovers of dwarf stars like our own Sun, exploding.

Carbon, the basis of life? Mostly from dying low mass stars.

The gold ring on your finger? Mostly from merging neutron stars, leftovers from supernovae.

#VicisAstro #astrodon #astronomy #astrophysics

Table of elements colored by their cosmic origin: big bang fusion, cosmic ray fusion, merging neutron stars, exploring massive stars, dying low mass stars, exploring white dwarfs.
#astronomy #astrophysics #Astrodon #vicisastro

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