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ESO Profile picture
@ESO
Sep 9, 2022 • 4 tweets • 2 min read • Read on X
1/ Like in this image of the star Albireo with Starlink satellites, an increasing number of satellites will be detectable above all astronomical observatories. #ProtectDarkSkies
Credit: Rafael Schmall Image
2/ We are actively involved in research to study the potential effects of new satellite constellations. Our studies found that telescopes such as our VLT and ELT will be “moderately affected” by these satellites. (3% of twilight observations) #ProtectDarkSkies
3/ The greatest impact of new satellite constellations will be felt by wide-field surveys made by various telescopes, with 30-50% of twilight observations being “seriously impacted”. #ProtectDarkSkies
4. If you want to learn more about how we can protect our dark and quiet skies, visit ESO’s dedicated webpage. 🔗 eso.org/public/about-e… #ProtectDarkSkies

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More from @ESO

ESO Profile picture
Sep 22, 2022
1/ Using @almaobs , astronomers have found a hot bubble of gas swirling around Sagittarius A* the black hole at the centre of our galaxy, at 30% of the speed of light.
🔗 eso.org/public/news/es…

Image & artist’s illustration: @ehtelescope , @ESO /M. Kornmesser. Ack.: M. Wielgus Image
2/ Clues about this bubble were hidden in ALMA data obtained in 2017 as part of observations with the Event Horizon Telescope.
3/ Hot bubbles were long thought to be linked to high-energy flares in Sagittarius A* but their presence in radio light was elusive, until now.
Read 6 tweets
ESO Profile picture
May 12, 2022
📢 Breaking news: Meet the Black Hole at the Centre of our Galaxy! Astronomers have unveiled the 1st image of the supermassive black hole at the centre of the Milky Way. The image was produced by a global research team @ehtelescope 📷EHT Collaboration
“It is very exciting for ESO to have been playing such an important role in unravelling the mysteries of black holes, and of Sgr A* in particular, over so many years,” commented ESO Director General @xbarcons 👇
“ESO not only contributed to the EHT observations through the ALMA and APEX facilities but also enabled, with its other observatories in Chile, some of the previous breakthrough observations of the Galactic centre.”
Read 25 tweets
ESO Profile picture
May 12, 2022
1/ Do you want to play some Wordle with us?
2/ One more guess:
3/ What might it be?
Read 4 tweets
ESO Profile picture
Jan 13, 2022
1/ It’s #ESOUsersDay, and we’d like to congratulate our colleague @cfmanara , astronomer at ESO in Garching, who has been awarded an @ERC_Research Starting Grant! #ERCStG His project will investigate the origin of the rings & asymmetric structures in protoplanetary discs. Image
@cfmanara @ERC_Research 2/ His project uses VLT instruments like X-Shooter, ESPRESSO, UVES, CRIRES+, SPHERE & MUSE as well as @almaobs The goal is to study the signatures that planets and winds leave on discs, pushing current studies to distant and massive star-forming regions and preparing for the ELT
@cfmanara @ERC_Research @almaobs 3. Also, next week we restart our Hypatia Colloquium series! On Jan 18 at 15:00 CET, Laura Sommovigo ( @scuolanormale ) will talk about the dust temperature in high-z galaxies, and Leindert Boogaard ( @mpi_astro ) will focus on gold gas at 15:30.
Details: eso.org/sci/meetings/g… Image
Read 4 tweets
ESO Profile picture
Jan 12, 2022
1/ Did you watch #DontLookUp by @GhostPanther ? Fun fact: when Dr. Mindy is scribbling orbital equations on a whiteboard, that’s actually our own @MichaelMarsset , currently an @ESO fellow in Chile! Image
@GhostPanther @MichaelMarsset 2/ Michaël is an expert on asteroids, having used our VLT to study their shapes and formation history. In 2020 he was a postdoc at @MIT and when the movie team reached out looking for a "double" for that scene, he didn't think twice.

Credit: @ESO /M. Marsset Image
@GhostPanther @MichaelMarsset @MIT 3/ "I immediately replied that I was interested," he says, "being a huge fan of @LeoDiCaprio both as an actor and as an environmental activist. The central idea of the movie, the imminence of a cometary impact as an allegory of the climate crisis, also strongly resonated with me"
Read 6 tweets
ESO Profile picture
Jul 22, 2021
1/ Astronomers made the first clear detection of a moon-forming disc around an exoplanet, using @ALMAObs , in which ESO is a partner.

🔗eso.org/public/news/es…
Credit: ALMA (ESO/NAOJ/NRAO)/Benisty et al.
2/ The disc in question, called a circumplanetary disc, surrounds the exoplanet PDS 70c, one of two giant, Jupiter-like planets orbiting a star nearly 400 light-years away.

Credit: @ESO /L. Calçada, ALMA (ESO/NAOJ/NRAO)/Benisty et al.
3/ Astronomers had found hints of a “moon-forming” disc around this exoplanet before but, since they could not clearly tell the disc apart from its surrounding environment, they could not confirm its detection — until now.

Credit: ALMA (ESO/NAOJ/NRAO)/Benisty et al.
Read 5 tweets

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