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Reposted by Messier33
pomarede.bsky.social
Cosmography archives

On Two Distribution Maps of the Nebulæ and Clusters in Dr. Dreyer's Catalogue of 1888.

by Sidney Waters (1894)

ui.adsabs.harvard.edu/abs/1894MNRA... 🔭🧪 @rasjournals.bsky.social
The nebulæ and clusters of the Northern Heavens drawn upon an equal surface projection. The chart features a drawing of the Milky Way. The irresolvable nebulæ, now understood to be galaxies, are marked as black dots. Their distribution is rather inhomogeneous, exhibiting structures such as aggregations and filaments. The resolvable nebulæ are marked as red dots. Star clusters are marked with a red cross; they mostly adhere to the track of the Milky Way. The nebulæ and clusters of the Southern Heavens drawn upon an equal surface projection. The chart features a drawing of the Milky Way. The irresolvable nebulæ, now understood to be galaxies, are marked as black dots. Their distribution is rather inhomogeneous, exhibiting structures such as aggregations and filaments. The Large and Small Magellanic Clouds stand out as extraordinary aggregations near the centre of the chart. The resolvable nebulæ are marked as red dots. Star clusters are marked with a red cross; they mostly adhere to the track of the Milky Way.
February 4, 2026 at 2:31 PM
Reposted by Messier33
gutenberg.org
The Hidden Aesthetics of Early Astrophotography

Behind the transformative star photographs of the 1880s lay a complex collaboration between astronomers and engravers.

By Danny Robb

daily.jstor.org/the-hidden-a...

Astronomy at PG
www.gutenberg.org/ebooks/books...

#books #astronomy #photography
Spiral nebula M 51 by the Lick observatory 1900. The center of the image shows a spectacular spiral galaxy with clearly defined spiral arm structure. The galaxy appears as a bright, roughly circular object with luminous spiral arms curving outward from a bright central core. https://commons.wikimedia.org/wiki/File:PSM_V58_D028_Spiral_nebula_m_51_by_the_lick_observatory_1900.png
January 5, 2026 at 9:26 AM
Reposted by Messier33
sciam.bsky.social
Scientists detected gas at least five times hotter than previous theories had predicted inside a galaxy cluster from the early universe
Stunningly Hot Galaxy Cluster Puts New Spin on How These Cosmic Behemoths Evolved
Scientists detected gas at least five times hotter than previous theories had predicted inside a galaxy cluster from the early universe
www.scientificamerican.com
January 5, 2026 at 8:02 PM
Reposted by Messier33
science.esa.int
On the eleventh day of Christmas, Webb sent to us
A chaotic scene around massive young stars
A detail in the Cat’s Paw Nebula 🐾

Discover the full image here 👉 https://www.esa.int/Science_Exploration/Space_Science/Webb/Webb_scratches_under_Cat_s_Paw_Nebula_for_third_anniversary
🔭
This Webb image is presented as a bell shape surrounded by Christmas tree branches. The Webb image itself shows a section of the Cat’s Paw, a local star-forming region composed of gas, dust, and young stars. Credit: NASA, ESA, CSA, STScI
January 4, 2026 at 4:01 PM
Reposted by Messier33
allthegalaxies.galaxyzoo.org
A smooth galaxy, observed with the Hubble Space Telescope in the COSMOS survey.

It is at redshift 0.57 (lookback time 5.70 billion years) with coordinates (149.99418, 1.77989).

50 volunteers classified this galaxy in Galaxy Zoo: Hubble.
A smooth galaxy from the Galaxy Zoo: Hubble project, classified by 50 volunteers.
January 3, 2026 at 6:35 PM
Reposted by Messier33
science.esa.int
Hubble went back to observe interstellar comet #3I/ATLAS on 30 November. At the time, the comet was about 286 million kilometres from Earth 👉 www.esa.int/ESA_Multimed...

Hubble tracked the comet as it moved across the sky. That's why background stars appear as streaks of light. 🔭 🧪
The comet appears as a white dot in the middle of a large blue halo. A few stars appear as bluish streaks of light against the black background. Credit: NASA, ESA, STScI, D. Jewitt (UCLA). Image Processing: J. DePasquale (STScI)
December 5, 2025 at 9:42 AM
Reposted by Messier33
science.esa.int
Euclid, our #DarkUniverse 🕵️ detective, is hard at work creating a map of the large-scale structure of the Universe across space and time.

What five mysteries is this detective trying to crack? Find out here 👉 www.esa.int/Science_Expl...

🔭
Artist impression of the Euclid mission in space. The spacecraft is white and gold and consists of three main elements: a flat sunshield, a large cylinder where the light from space will enter, and a 'boxy' bottom containing the instruments. The spacecraft is shown half in the shadow, because the sunshield will always be faced in the direction of the Sun and thus protecting the telescope from the light of the Sun. The background is a realistic representation of a deep field view of the night sky, with many galaxies visible. On the bottom half of the image, an artistic representation of the cosmic web is overlayed over the galaxies. The cosmic web is the scaffolding of the cosmos on which galaxies are built, consisting primarily of dark matter and laced with gas. The cosmic web is here represented with a grid and a two-dimensional representation of a cosmological simulation.
December 5, 2025 at 12:25 PM
messier33.bsky.social
Back home after celebrating that Norway finally playing in a world cup! 🥳👏
#NFF
#WC26
November 17, 2025 at 7:26 PM
Reposted by Messier33
esa.int
Mission confirmed ✅

#CopernicusEU Sentinel-6B is now in orbit and ready to begin its Launch & Early Operations phase with @operations.esa.int. The satellite is ready to continue a decades-long mission to track the height of the planet’s seas – a key measure of climate change.
Sentinel-6B launched to extend record of sea-level rise
The latest guardian of our oceans has taken its place in orbit. The Copernicus Sentinel-6B satellite is now circling Earth, ready to continue a decades-long mission to track the height of the planet’s...
esa.int
November 17, 2025 at 7:14 AM
Reposted by Messier33
science.esa.int
Hubble has returned to the ‘Lost Galaxy’, a spiral galaxy about 50 million light-years away in the constellation Virgo.

Its nickname comes from the fact that it’s extremely faint when viewed through a small telescope. Not the case for Hubble though!

Read more 👉 esahubble.org/images/potw2...
🔭
A close-in view of a spiral galaxy that faces the viewer. Brightly lit spiral arms swing outwards through the galaxy’s disc, starting from an elliptical region in the centre. Thick strands of dark reddish dust are spread across the disc, mostly following the spiral arms. The arms also contain many glowing pink-red spots where stars form. The galaxy is a bit fainter beyond the arms, but speckled with blue stars. Credit: ESA/Hubble & NASA, F. Belfiore, J. Lee and the PHANGS-HST Team
November 17, 2025 at 8:00 AM
Reposted by Messier33
esa.int
🚀It’s almost time to shape the next chapter of Europe’s journey in space.

The European Space Agency’s Council Meeting at Ministerial Level, known as #CM25, will take place in Bremen, Germany, on 26 and 27 November 2025.

Journalists register here 👉
www.esa.int/Newsroom/Pre...
October 9, 2025 at 11:33 AM
Reposted by Messier33
stsci.edu
We’re seeing double: two interacting galaxies imaged by #Hubble and #NASAWebb. Hubble shows obscuring brown dust and blue star-filled regions, while Webb shows glowing cold dust as white material and pink stars still embedded in dust: https://bit.ly/3F72M4a 🔭 🧪
September 12, 2025 at 3:01 PM
Reposted by Messier33
wonderofscience.bsky.social
The evolution of the Moon.
4.5 billion years in 2 minutes.

Credit: NASA Goddard
September 11, 2025 at 11:29 PM
Reposted by Messier33
esa.int
🌍 Iron-rich red soils and parallel sand dune ridges stand out in this Φsat-2 image of the Gibson Desert.

Spanning over 150 000 sq km, the desert’s landscape is shaped by wind and a dry climate.

In the lower part of the image, the dry lakebed of the Fortescue River is visible.
Gibson Desert, Australia.
September 12, 2025 at 8:58 AM
Reposted by Messier33
science.esa.int
Venus is a Solar System enigma.

Although Venus is similar in size and distance from the Sun to Earth, it has evolved very differently from our planet.

Our #Envision mission will aim to solve some of the puzzle by thoroughly studying our closest neighbour.
www.esa.int/Science_Expl... 🔭
Top five Venus mysteries Envision will solve
Venus is a Solar System enigma. Similar in size to Earth and orbiting the Sun at a similar distance, it is remarkable how the two planets evolved so differently. While conditions on Earth allowed life...
www.esa.int
September 12, 2025 at 9:28 AM
Reposted by Messier33
wonderofscience.bsky.social
Soccer in space.
August 29, 2025 at 10:07 PM
Reposted by Messier33
science.esa.int
The ethereal Butterfly Star! 🦋⭐

The NASA/ESA/CSA James Webb Space Telescope captured this young star still gathering mass from its environment.

The gas surrounding it collects in dusty protoplanetary discs, where new planets can form.

Read more 👉 www.esa.int/Science_Expl... 🔭🧪
A wide-field image of IRAS 16594-4656 taken by the James Webb Space Telescope. The nebula’s bright core is split by a narrow dark band, with expansive rainbow lobes of light and colour radiating outward. Numerous background galaxies and stars are visible across the field.
August 29, 2025 at 8:00 AM
Reposted by Messier33
esa.int
An ethereal view of a young star 🧚🦋✨

The NASA/ESA/CSA James #Webb Space Telescope captured IRAS 04302+2247, a dusty disc where planets may be forming.

In stellar nurseries, baby stars grow in cold gas clouds, forming discs like this one.

🔗 www.esa.int/Science_Expl...
A wide-field image of IRAS 16594-4656 taken by the James Webb Space Telescope. The nebula’s bright core is split by a narrow dark band, with expansive rainbow lobes of light and colour radiating outward. Numerous background galaxies and stars are visible across the field.
August 29, 2025 at 8:29 AM
Reposted by Messier33
science.esa.int
Using its large field of view, Einstein Probe can monitor a huge part of the Universe at once. The mission surveys the sky to learn more about:

🕳️ black holes
🔘 neutron stars
💥 gamma-ray bursts
🌟 supernovae
☄️ emissions from comets & more

Discover the mission here 👉 www.esa.int/Science_Expl... 🔭
An illustration of the Einstein Probe spacecraft.
August 29, 2025 at 9:02 AM
Reposted by Messier33
science.esa.int
Back on track & ready for Venus! ✅📍

After the successful resolution of a communication anomaly, #ESAJuice is on course for its Venus flyby at 07:28 CEST on 31 August. 1/3 🔭 🧪
August 25, 2025 at 10:19 AM
Reposted by Messier33
wonderofscience.bsky.social
A microscopic tardigrade going for a stroll through some algae.

Credit: Sinclair Stammers
August 23, 2025 at 11:38 PM
Reposted by Messier33
science.esa.int
🐈‍⬛ We're celebrating #InternationalCatDay with a cosmic duo:

🐾 The Cat’s Paw Nebula, where stars are born in purr-fect, fluffy clouds

👁️ the Cat’s Eye Nebula, a purr-plexing beauty with colourful shells

Which space kitty matches your cat's purr-sonality: the playful paw or the mysterious eye?
Webb view of a section of the Cat’s Paw, a local star-forming region composed of gas, dust, and young stars. Four roughly circular areas are toward the centre of the frame: a small oval toward the top left, a large circle in the top centre, and two ovals at bottom left and right. Each circular area has a luminous blue glow, with the top centre and bottom left areas the brightest. Brown-orange filaments of dust, which vary in density, surround these four bluish patches and stretch toward the frame’s edges. A section of the Cat’s Paw, a local star-forming region composed of gas, dust, and young stars. Four roughly circular areas are toward the centre of the frame: a small oval toward the top left, a large circle in the top centre, and two ovals at bottom left and right. Each circular area has a luminous blue glow, with the top centre and bottom left areas the brightest. Brown-orange filaments of dust, which vary in density, surround these four bluish patches and stretch toward the frame’s edges. Small zones, such as to the left and right of the blue circular area at top centre, appear darker and seemingly vacant of stars. Toward the centre are small, fiery red clumps scattered amongst the brown dust. Many small, yellow-white stars are spread across the scene, some with eight-pointed diffraction spikes that are characteristic of Webb. A few larger blue-white stars with diffraction spikes are scattered throughout, mostly toward the top left and bottom right. Toward the top right corner is a bright red-orange oval.Many small, yellow-white stars are spread across the scene, some with eight-pointed diffraction spikes that are characteristic of Webb. A few larger blue-white stars with diffraction spikes are scattered throughout, mostly toward the top left and bottom right. Toward the top right corner is a bright red-orange oval. Credit: NASA, ESA, CSA, STScI Euclid view of the Cat’s Eye Nebula. A dot lies at the centre of the nebula, the sight of the dying star. Around it are a series of complex and colourful layers and loops of gas and dust that have been ejected by the star over time. Further away are tendrils and patches of gas and dust in various shapes and sizes that give the impression of fragments of a burst balloon frozen around the point of explosion. Millions of galaxies lie in the background. Numerous bright stars with distinct diffraction spikes are also clearly visible. Credit: ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre, E. Bertin, G. Anselmi
August 8, 2025 at 7:43 AM
Reposted by Messier33
esa.int
📷 This NASA/ESA #Hubble Space Telescope image shows reflection nebula GN 04.32.8. Reflection nebulae are clouds of dust that don't emit their own light, as other nebulae do. Instead, light from nearby stars scatters off their dust, lighting them up.
🔗 esahubble.org/images/potw2... @stsci.edu
A long, smoky, greyish-blue cloud in the centre of the image curves in an arc around three bright stars, each with long cross-shaped diffraction spikes. The cloud is lit more brightly on the inner side facing the stars, and fades into the dark background on the outer side. A few other stars and points of light surround the cloud: one small star below it has a dark band crossing its centre.
July 29, 2025 at 8:34 PM
Reposted by Messier33
esa.int
🗓️ Save the date(s)!

Please join us at #ESAOpenDays this year:

12 Sept. - ESA ESOC, Darmstadt 🇩🇪
20 Sept. - ESA HQ, Paris 🇫🇷
26 Sept. - ESA ESRIN, Frascati 🇮🇹
4 Oct. - ESA ESAC, Villanueva de la Cañada 🇪🇸
11-12 Oct. - ESA ESTEC, Noordwijk 🇳🇱

Stay tuned!
Infographic for ESA Open Days 2025, dates and locations shown: 12 Sept. ESA ESOC, Darmstadt, Germany 20 Sept. ESA HQ, Paris, France 26 Sept. ESA ESRIN, Frascati, Italy 4 Oct. ESA ESAC, Villanueva de la Cañada, Spain 11-12 Oct. ESA ESTEC, Noordwijk, Netherlands
July 29, 2025 at 11:48 AM
Reposted by Messier33
wonderofscience.bsky.social
Mount Fuji seen from the International Space Station.
A snow-capped stratovolcano surrounded by green fields.
July 29, 2025 at 11:27 PM