#Tag · bonfire.cafe

"Aethelmaer of Malmesbury’s comet" doesn't exactly roll off the tongue, but: credit where credit's due, eh?

https://www.universiteitleiden.nl/en/news/2026/01/halleys-comet-wrongly-named-11th-century-english-monk-predates-british-astronomer

#astronomy #history #comet

Leiden University

Halley’s Comet wrongly named: 11th-century English monk predates British astronomer

The British astronomer and mathematician Edmond Halley was not, after all, the first to understand the cycle of the comet that now bears his name. This is shown by research conducted by, among others, Professor Simon Portegies Zwart. It was the monk Eilmer of Malmesbury who, as early as the 11th century,…

Дими́трий

@saltywizard@beige.party · last week

"Aethelmaer of Malmesbury’s comet" doesn't exactly roll off the tongue, but: credit where credit's due, eh?

https://www.universiteitleiden.nl/en/news/2026/01/halleys-comet-wrongly-named-11th-century-english-monk-predates-british-astronomer

#astronomy #history #comet

Leiden University

Halley’s Comet wrongly named: 11th-century English monk predates British astronomer

Quixoticgeek boosted

Fabrizio Musacchio

@FabMusacchio@mastodon.social · last week

Thanks @albertcardona for sharing this! I wasn’t aware of the #BayeuxTapestry at all, nor that #Halley’s #Comet played such a prominent role in #MedievalArt and perception. A fascinating story! https://mathstodon.xyz/@albertcardona/115992114758518351

A medieval tapestry scene showcasing people, buildings, and a banner with "ISTI MIRANT STELLA" at the top.

Figure 2: Harold’s election and consecration, followed by a group of Anglo-Saxons pointing at the sky towards a ‘star’. Bayeux Tapestry, scenes 30-32. Image: Bayeux Museum. — A medieval tapestry scene showcasing people, buildings, and a banner with "ISTI MIRANT STELLA" at the top. Figure 2: Harold’s election and consecration, followed by a group of Anglo-Saxons pointing at the sky towards a ‘star’. Bayeux Tapestry, scenes 30-32. Image: Bayeux Museum.

Fabrizio Musacchio

@FabMusacchio@mastodon.social · last week

Taggart boosted

Bill

@Sempf@infosec.exchange · 2 months ago

I know I posted about this last night, but doncha wanna know what happened internally that made this soooo important right now? At least kinda?

https://www.infosecurity-magazine.com/news/gartner-calls-for-pause-ai-browsers/

#gartner #comet

Bill

@Sempf@infosec.exchange · 2 months ago

I know I posted about this last night, but doncha wanna know what happened internally that made this soooo important right now? At least kinda?

https://www.infosecurity-magazine.com/news/gartner-calls-for-pause-ai-browsers/

#gartner #comet

Prof. Sam Lawler boosted

Simeon Schmauß

@stim3on@fosstodon.org · 2 months ago

The first image of #3IAtlas from ESA's JUICE mission is in!

I reprocessed the image to remove hot pixels (left) and the stars (right) to make the tail easier to see.

EDIT: The starless image was updated with a cleaner version.

See here for the official ESA release: https://www.esa.int/ESA_Multimedia/Images/2025/12/Comet_3I_ATLAS_shows_activity_in_Juice_navigation_camera_teaser

Credit: ESA/Juice/NavCam
Processing: Simeon Schmauß

#space #comet #ESA #ESAJUICE

2 media

A starfield with 3I/Atlas in the center, visible as a bright fuzzy object with a faint tail pointing upward.

The same image, but with the stars removed, showing 3I/Atlas in the center, visible as a bright fuzzy object with a faint tail pointing upward.
With no stars in the image, the tail is easier to make out, it appears to be a little undulated.
The same image, but with the stars removed, showing 3I/Atlas in the center, visible as a bright fuzzy object with a faint tail pointing upward.
With no stars in the image, the tail is easier to make out, it appears to be a little undulated.

EDIT: this image was updated with a cleaner version. — The same image, but with the stars removed, showing 3I/Atlas in the center, visible as a bright fuzzy object with a faint tail pointing upward. With no stars in the image, the tail is easier to make out, it appears to be a little undulated. The same image, but with the stars removed, showing 3I/Atlas in the center, visible as a bright fuzzy object with a faint tail pointing upward. With no stars in the image, the tail is easier to make out, it appears to be a little undulated. EDIT: this image was updated with a cleaner version.

Alan Boyle

@alanboyle@mastodon.social · 2 months ago

Is an #interstellar #comet actually an #alien spaceship? A researcher who specializes in studying conspiracy theories has traced how such way-out claims about an object known as 3I/ATLAS go viral. https://www.geekwire.com/2025/alien-interstellar-comet-3iatlas-speculation-viral/ #3IATLAS #space #interstellarObject

Photo of interstellar comet 3I/ATLAS by Victor Sabet and Julien De Winter

Florian 'floe' Echtler boosted

Daniel Pomarède

@pomarede@mastodon.social · 2 months ago

Comet 2025 R2 (SWAN) tracked by NASA's PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission

https://science.nasa.gov/blogs/punch/2025/12/02/nasas-punch-tracks-comet-discovered-by-soho-spacecraft/

Credit: NASA/Southwest Research Institute

#Comet #SWAN #PUNCH #R2SWAN #Astronomy #Astrodon #science #news #video

GIF

nullagent boosted

cafuego 🔭🤦🏼‍♂️

@cafuego@misanthrope.social · 2 months ago

It’s not much to look at, only four minutes of data and with a tree in the way, but it’s mine.

Interstellar #comet 3I Atlas.

#astrophotography #space #astrodon

A grainy image, mostly dark, with a few scattered stars here and there. In the center is a tiny faint smudge, slightly elongated towards the bottom.

Simeon Schmauß

@stim3on@fosstodon.org · 2 months ago

The first image of #3IAtlas from ESA's JUICE mission is in!

I reprocessed the image to remove hot pixels (left) and the stars (right) to make the tail easier to see.

EDIT: The starless image was updated with a cleaner version.

See here for the official ESA release: https://www.esa.int/ESA_Multimedia/Images/2025/12/Comet_3I_ATLAS_shows_activity_in_Juice_navigation_camera_teaser

Credit: ESA/Juice/NavCam
Processing: Simeon Schmauß

#space #comet #ESA #ESAJUICE

2 media

Karl Urban boosted

Astronomy Picture of the Day

@apod@mastodon.bot · 2 months ago

APOD from 2025-12-01

3I ATLAS: Tails of an Interstellar #Comet

Studying comet 3I/ATLAS, an interstellar visitor, suggests our Solar System is typical. It shares characteristics with our comets, like composition and dust ejection. Captured in Texas, the image shows a green coma and blue ion tail—common features. After its December #Earth flyby, it'll exit our system forever.

HD image at https://apod.nasa.gov/apod/ap251201.html#space #astronomy #asteroid #meteor #telescope #universe

3I ATLAS: Tails of an Interstellar Comet

Daniel Pomarède

@pomarede@mastodon.social · 2 months ago

Comet 2025 R2 (SWAN) tracked by NASA's PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission

https://science.nasa.gov/blogs/punch/2025/12/02/nasas-punch-tracks-comet-discovered-by-soho-spacecraft/

Credit: NASA/Southwest Research Institute

#Comet #SWAN #PUNCH #R2SWAN #Astronomy #Astrodon #science #news #video

GIF

cafuego 🔭🤦🏼‍♂️

@cafuego@misanthrope.social · 2 months ago

It’s not much to look at, only four minutes of data and with a tree in the way, but it’s mine.

Interstellar #comet 3I Atlas.

#astrophotography #space #astrodon

Astronomy Picture of the Day

@apod@mastodon.bot · 2 months ago

APOD from 2025-12-01

3I ATLAS: Tails of an Interstellar #Comet

HD image at https://apod.nasa.gov/apod/ap251201.html#space #astronomy #asteroid #meteor #telescope #universe

nullagent boosted

AkaSci 🛰️

@AkaSci@fosstodon.org · 3 months ago

Some spectacular images of comets C/2025 A6 (Lemmon) and C/2025 R2 (SWAN) taken from space with auroras and airglow in the foreground. These photographs were taken in October from the International Space Station..

#NASA #ISS #Comet
1/n

3 images of comets and auroras/airglows.

Descriptions from the tweet -

1. Comet Swan (C/2025 R2) appears above Earth’s yellow-green airglow just before an orbital sunrise, at a distance of about 27.2 million miles (43.8 million kilometers) from the planet. The International Space Station was orbiting 264 miles above the Atlantic Ocean off the coast of Canada's most easterly province of Newfoundland and Labrador when this photograph was taken.

2. This long-exposure photograph shows a bright aurora radiating above Earth as Comet Lemmon (C/2025 A6) soared past the planet at a distance of about 57.2 million miles (92.1 million kilometers). The International Space Station was orbiting 263 miles above northern Minnesota at the time of this photograph.

3. Comet Swan (C/2025 R2) appears above Earth’s yellow-green airglow just before an orbital sunrise, at a distance of about 27.2 million miles (43.8 million kilometers) from the planet. The International Space Station was orbiting 264 miles above the Atlantic Ocean off the coast of Canada's most easterly province of Newfoundland and Labrador when this photograph was taken.

Link: https://x.com/Space_Station/status/1990956943788429385 — 3 images of comets and auroras/airglows. Descriptions from the tweet - 1. Comet Swan (C/2025 R2) appears above Earth’s yellow-green airglow just before an orbital sunrise, at a distance of about 27.2 million miles (43.8 million kilometers) from the planet. The International Space Station was orbiting 264 miles above the Atlantic Ocean off the coast of Canada's most easterly province of Newfoundland and Labrador when this photograph was taken. 2. This long-exposure photograph shows a bright aurora radiating above Earth as Comet Lemmon (C/2025 A6) soared past the planet at a distance of about 57.2 million miles (92.1 million kilometers). The International Space Station was orbiting 263 miles above northern Minnesota at the time of this photograph. 3. Comet Swan (C/2025 R2) appears above Earth’s yellow-green airglow just before an orbital sunrise, at a distance of about 27.2 million miles (43.8 million kilometers) from the planet. The International Space Station was orbiting 264 miles above the Atlantic Ocean off the coast of Canada's most easterly province of Newfoundland and Labrador when this photograph was taken. Link: https://x.com/Space_Station/status/1990956943788429385

AkaSci 🛰️

@AkaSci@fosstodon.org · 3 months ago

#NASA #ISS #Comet
1/n

Cat 🐈🥗 (D.Burch) :paw:⁠:paw: boosted

Where are we now?

@wawn@mastodon.social · 3 months ago

2025-11-17 04:00:00 UTC (Delta: 2025-11-16)

☄️C/2024 E1 Wierzchoś
- Barycentric speed: 35.35 km/s (+0.20 km/s)
- Perihelion in: 65 days
- Closest approach to Earth in: 92 days
- Brightness (Mag): 13.67 (-0.03)
- Visibility: Small telescope - dark sky

🌎 Relative to Earth
- Distance (km): 323,162,658.54 km (-1,118,478.97 km)
- Distance (AU): 2.16 (-0.01)
- Light travel time: 17 min 57.99 s (-3.73 s)

#C2024E1 #Wierzchos #Comet

Where are we now?

@wawn@mastodon.social · 3 months ago

2025-11-17 04:00:00 UTC (Delta: 2025-11-16)

🌎 Relative to Earth
- Distance (km): 323,162,658.54 km (-1,118,478.97 km)
- Distance (AU): 2.16 (-0.01)
- Light travel time: 17 min 57.99 s (-3.73 s)

#C2024E1 #Wierzchos #Comet

Lisa Melton boosted

TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

@KrajciTom@universeodon.com · 3 months ago

Saying goodbye to comet A6 Lemmon. It's getting very low, and clouds are increasing in southern New Mexico.

It was a remarkable run of many clear nights.

This is a single exposure on a fixed tripod.

There's a blurred silhouette of a power line, and satellite trails in this image. They belong in the frame because this is the world we have created. It's getting increasingly difficult to escape to pristine nature.

Perhaps the phrase 'pristine nature' is now an oxymoron?

When is the first No Kings General Strike?

We all need to help with community building and boosting civic engagement. These activities have atrophied for decades, and it shows.

#NewMexico #Comet #Photography #Astrophotography #Technology #Astronomy #Science #Nature #Politics #USpol #Fascism #MAGA #ClimateChange #Trump #Musk #Anthropocene