Esther Hanko
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oetie.nl
Esther Hanko
@oetie.nl
1K followers 1.1K following 610 posts
Glamateurastronoom 💅 | Moestuinmiep | Outreachcoördinator @uva_api
| Raar kattenvrouwtje | @[email protected] | blog: oetie.nl
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Esther Hanko @oetie.nl · Nov 30
Foto van Jupiter van gisteravond vanuit de voortuin in Purmerend. 🔭📷
Kleurenfoto van de planeet Jupiter, een licht afgeplatte bol met horizontale bruine en grijze strepen. De strepen hebben allemaal verschillende soorten golven en bolletjes. De Grote Rode Vlek, de meest bekende vlek van de planeet staat rechts onder aan de rand.
Reposted by Esther Hanko
jldauvergne.bsky.social
Une autre Jupiter du 21 mais la nuit d'avant. Conditions rock'n roll. Appréciez la pénombre autour de l'ombre de Ganymède.
November 23, 2025 at 12:38 PM
oetie.nl
nos.nl/artikel/2591...

"Bedrijven in Nederland kunnen helemaal niet vergroenen vanwege netcongestie."

Oh ja nee ja daar kan de politiek inderdaad HELEMAAL NIETS AAN DOEN. Die hoogspanningsmasten zijn ook op magische wijze verschenen indertijd.
Nederland organiseert met Colombia top over afbouwen 'fossiel', BBB niet blij
Het plan werd bekendgemaakt door minister Sophie Hermans (Klimaat en Groene Groei) op de klimaattop in Brazilië.
nos.nl
November 21, 2025 at 2:43 PM
Reposted by Esther Hanko
rozlovesfood.bsky.social
Grizzly reminds - one must STRETCH
further wellness checks:
did you hydrate?
take meds?
had a food?
paused in doomscrolling to attempt to tickle a stretching cat's belly on your screen?
squee at something cute?
found a smidge of joy in our current hellscape?
a black cat is indulging in an exceptionally BIG (and elongated) stretch on a marble tiled floor. All leggies are straight, all toes are flared with claws extended, the back is arched. He is taking up maximum space.
November 15, 2025 at 7:55 PM
Reposted by Esther Hanko
thesuntoday.bsky.social
🚀 As we wait for the next CME — and maybe more aurora action — here’s a look at what’s racing toward Earth! ⚡️ This eruption and CME blasted out with yesterday’s X5.2 flare, complete with a powerful shock and particles hitting the cameras. Fingers crossed 🤞 and skies clear! 🌌

bit.ly/sunactivity
November 12, 2025 at 8:03 PM
Reposted by Esther Hanko
stephyardley.bsky.social
Looks like Bz is northwards (although decreasing) so we may be in for disappointment tonight unless the situation changes. The weather is awful here and I have a 6am flight so I am signing off for tonight 🌧️👋
November 12, 2025 at 11:06 PM
Reposted by Esther Hanko
bgs.ac.uk
We have upgraded our geomagnetic forecast today (12 November 2025) to the highest intensity level amid an ongoing solar storm.

Current predictions suggest that the activity will result in potentially the largest solar storm to hit our planet in over two decades.
November 12, 2025 at 2:55 PM
Reposted by Esther Hanko
stephyardley.bsky.social
There is now a G5 (extreme) geomagnetic storm watch in place (Met Office), we are waiting for the third eruption to arrive although, due to uncertainty in the propagation models it is unclear whether it will arrive today or tomorrow 🌞💨🌎👀 #SpaceWeather #Aurora #StephsStormWatch
November 12, 2025 at 12:33 PM
Reposted by Esther Hanko
skycalpro.com
In 1892 E.E. Barnard discovered Jupiter's 5th moon, Amalthea, the last moon found by eye through a telescope. Over the next 80 years photos were B&W, and improved only a little over the period.

1891 Lick Obs-36" refractor, E.E. Barnard
1950 Mt Palomar-200" reflector, M.L. Humason
#AstroHistory
Alt text 1 (1891): 1891 photograph of Jupiter taken by E.E. Barnard with the 36-inch refractor at Lick Observatory, Mount Hamilton, California. One of the earliest detailed ground-based views; south up. Public domain. Alt text 2 (1950): 1950 photographs of Jupiter by M.L. Humason using the 200-inch Hale Telescope at Palomar Observatory. Among the sharpest black-and-white ground-based images before spacecraft; south up. Public domain. ```​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
November 12, 2025 at 7:19 AM
Reposted by Esther Hanko
astrokev.bsky.social
Saturn on Saturday evening using the Celestron C11 at prime focus, with a Uranus-C camera.
Seeing wasn't great and I struggled to get decent data using a Barlow.
6 images derotated in winjupos.
🔭
November 10, 2025 at 4:56 PM
Reposted by Esther Hanko
vincentledvina.bsky.social
Here is the latest SWPC graphic regarding the recent X1.2 flare from AR 4274. Again, X-flares are not unusual around solar maximum, and Earth-directed CMEs of this caliber are not "dangerous." This is not a Carrington-class event by ANY means.
November 10, 2025 at 12:51 PM
Reposted by Esther Hanko
spaceweatherlive.com
Major X1.21 flare from sunspot region 4274
Follow live on https://www.spaceweather.live/l/flare
November 10, 2025 at 9:42 AM
Reposted by Esther Hanko
huubeggen.bsky.social
#Comet C/2025 A6 (Lemmon) very low in yesterday evening's twilight sky. @leonoor.bsky.social @waddensky.nl
The image shows a dark sky with some stars over leafs of a tree at bottom. The ccomet is in the centre of the image.
November 10, 2025 at 9:49 AM
Reposted by Esther Hanko
jldauvergne.bsky.social
La Jupiter du WE
November 10, 2025 at 10:24 AM
Reposted by Esther Hanko
nickkapur.bsky.social
Japan's "Mundane Halloween" costume contest is back!

Each year website DailyPortalZ holds a contest where people dress up as something super duper ordinary.

Here's a thread of some of my favorites from the 2025 contest!

#MundaneHalloween
November 2, 2025 at 9:15 AM
oetie.nl
Live vanuit Amsterdam bij het Allard Pierson tijdens #museumnacht #stoepsterrenkunde
November 1, 2025 at 7:33 PM
oetie.nl
Ik ga naar #Amsterdam en ik neem mee...
api.uva.nl Anton Pannekoek Institute for Astronomy @api.uva.nl · 26d
Dit is alweer vandaag! De weersverwachting is best ok dus wij staan lekker met telescopen voor de deur bij het Allard Pierson vanavond (met regenkappen voor de zekerheid). 🔭

#sterrenkijken @govertschilling.nl @mariekebaan.bsky.social
api.uva.nl Anton Pannekoek Institute for Astronomy @api.uva.nl · Oct 27
Zaterdag is de Amsterdamse #museumnacht en guess what: Wij zijn onderdeel van het programma bij het Allard Pierson met #stoepsterrenkunde of een astro AMA in het café van 20:00-0:00! Kom je langs? Hier zijn wat foto's van eerdere stoepsterrenkunde-evenementen in de stad.
November 1, 2025 at 3:08 PM
Reposted by Esther Hanko
coreyspowell.bsky.social
Astronomers sure do conjure up a lot of spooky images when they look out into deep space. A short Halloween thread:

Let's start with the Cosmic Bat Nebula (LDN 43). 🧪🔭

apod.nasa.gov/apod/ap24102...
What is the most spook-tacular nebula in the galaxy? One contender is LDN 43, which bears an astonishing resemblance to a vast cosmic bat flying amongst the stars on a dark Halloween night. Located about 1400 light years away in the constellation Ophiuchus, this molecular cloud is dense enough to block light not only from background stars, but from wisps of gas lit up by the nearby reflection nebula LBN 7. Far from being a harbinger of death, this 12-light year-long filament of gas and dust is actually a stellar nursery. Glowing with eerie light, the bat is lit up from inside by dense gaseous knots that have just formed young stars.
October 31, 2025 at 2:44 PM
oetie.nl
Kiekjes van komeet #Lemmon vanuit Purmerend. @govertschilling.nl @mariekebaan.bsky.social @huubeggen.bsky.social
Close up van komeet Lemmon. De komeet staat iets onder het midden, heeft een lichtgroene kern en een staart die ongeveer 1/6 van de hoogte van de foto inneemt. Wat meer uitgezoomde foto van komeet Lemmon met rechts wat wolken en op de voorgrond onderin wat bomen.
October 28, 2025 at 7:03 PM
oetie.nl
Stukje #bloomscrolling naar de mensen toe. Het hele huis ruikt ernaar!
De bloemen van onze epiphyllum. Ze zijn wit met perzik kleur. Een hangende wit met perzik kleurige bloem
October 28, 2025 at 8:25 AM
Reposted by Esther Hanko
api.uva.nl
Zaterdag is de Amsterdamse #museumnacht en guess what: Wij zijn onderdeel van het programma bij het Allard Pierson met #stoepsterrenkunde of een astro AMA in het café van 20:00-0:00! Kom je langs? Hier zijn wat foto's van eerdere stoepsterrenkunde-evenementen in de stad.
October 27, 2025 at 12:16 PM
Reposted by Esther Hanko
jacksaundrs.bsky.social
What possible use could the "People Who Teach You How To Understand and Work With Ideas and Information" have in the age of "The Machine That Punches Out Information of Questionable Quality"?
porcupunk.bsky.social Vlad K. @porcupunk.bsky.social · Oct 16
Wow. Just wow.

"Students pay premium prices for information that AI now delivers instantly and for free. A business student can ask ChatGPT to explain supply chain optimization or generate market analysis in seconds. The traditional lecture-and-test model faces its Blockbuster moment."
When Knowledge is Free, What are Professors For?
Higher Education Must Stop Competing with AI on Information and Start Teaching What Machines Can’t Do
www.forbes.com
October 16, 2025 at 8:27 AM
Reposted by Esther Hanko
api.uva.nl
Zaterdag 25-10 is het eerstvolgende moment dat je onze sterrenkoepels kunt bezoeken! Tijdens de #nachtvandenacht zijn onze deuren geopend van 20:00-0:00. Ieder heel uur start een rondleiding met #sterrenkijken als het helder is. Aanmelden kan vanaf morgenochtend 9:00 via api.uva.nl/nl/publieksa...
October 16, 2025 at 9:00 AM
Reposted by Esther Hanko
bloomberg.com
Startup Reflect Orbital aims to power solar farms at night by reflecting sunlight from about 4,000 satellites, has recently requested a license for a 2026 demo. But astronomers warn the bright objects could be “ruinous” to vital scientific research.
Plan to Reflect Sunlight to Power Solar Panels at Night Upsets Astronomers
Reflect Orbital aims to launch its first of a planned 4,000 satellites into orbit next year. Scientists worry that it would be “ruinous” for research.
bloom.bg
October 6, 2025 at 4:00 PM
oetie.nl
For a minute there I thought it said they were covering Celtic Frost but oh well 🤷
noisyastronomer.com Nicole Gugliucci @noisyastronomer.com · Oct 4
This is definitely something good to wake up to
jenlucpiquant.bsky.social Jennifer Ouellette @jenlucpiquant.bsky.social · Oct 4
A Trio of Badass Female Bagpipers From Different Continents Perform Celtic Covers of AC/DC Songs laughingsquid.com/goddesses-of...
October 4, 2025 at 12:35 PM
Reposted by Esther Hanko
roelvanderheijden.bsky.social
De reacties van het publiek tijdens mijn sterrenkijkavonden zijn goud waard. Een jaar geleden liet ik het iemand filmen in Amsterdam. En zie hier het resultaat! 🙂 Precies dit is waarom ik het blijf doen. 🪐🔭
October 2, 2025 at 8:52 AM