Esther Hanko
@oetie.nl
Glamateurastronoom 💅 | Moestuinmiep | Outreachcoördinator @uva_api
| Raar kattenvrouwtje | @[email protected] | blog: oetie.nl
| Raar kattenvrouwtje | @[email protected] | blog: oetie.nl
Pinned
Esther Hanko
@oetie.nl
· Nov 30
Foto van Jupiter van gisteravond vanuit de voortuin in Purmerend. 🔭📷
Reposted by Esther Hanko
🚀 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
bit.ly/sunactivity
November 12, 2025 at 8:03 PM
🚀 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
bit.ly/sunactivity
Reposted by Esther Hanko
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
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 🌧️👋
Reposted by Esther Hanko
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.
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
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.
Current predictions suggest that the activity will result in potentially the largest solar storm to hit our planet in over two decades.
Reposted by Esther Hanko
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
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
Reposted by Esther Hanko
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
1891 Lick Obs-36" refractor, E.E. Barnard
1950 Mt Palomar-200" reflector, M.L. Humason
#AstroHistory
November 12, 2025 at 7:19 AM
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
1891 Lick Obs-36" refractor, E.E. Barnard
1950 Mt Palomar-200" reflector, M.L. Humason
#AstroHistory
Reposted by Esther Hanko
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.
🔭
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
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.
🔭
Seeing wasn't great and I struggled to get decent data using a Barlow.
6 images derotated in winjupos.
🔭
Reposted by Esther Hanko
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
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.
Reposted by Esther Hanko
Major X1.21 flare from sunspot region 4274
Follow live on https://www.spaceweather.live/l/flare
Follow live on https://www.spaceweather.live/l/flare
November 10, 2025 at 9:42 AM
Major X1.21 flare from sunspot region 4274
Follow live on https://www.spaceweather.live/l/flare
Follow live on https://www.spaceweather.live/l/flare
Reposted by Esther Hanko
#Comet C/2025 A6 (Lemmon) very low in yesterday evening's twilight sky. @leonoor.bsky.social @waddensky.nl
November 10, 2025 at 9:49 AM
#Comet C/2025 A6 (Lemmon) very low in yesterday evening's twilight sky. @leonoor.bsky.social @waddensky.nl
Reposted by Esther Hanko
La Jupiter du WE
November 10, 2025 at 10:24 AM
La Jupiter du WE
Reposted by Esther Hanko
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
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
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
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
Live vanuit Amsterdam bij het Allard Pierson tijdens #museumnacht #stoepsterrenkunde
November 1, 2025 at 7:33 PM
Live vanuit Amsterdam bij het Allard Pierson tijdens #museumnacht #stoepsterrenkunde
Ik ga naar #Amsterdam en ik neem mee...
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
#sterrenkijken @govertschilling.nl @mariekebaan.bsky.social
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
Ik ga naar #Amsterdam en ik neem mee...
Reposted by Esther Hanko
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...
Let's start with the Cosmic Bat Nebula (LDN 43). 🧪🔭
apod.nasa.gov/apod/ap24102...
October 31, 2025 at 2:44 PM
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...
Let's start with the Cosmic Bat Nebula (LDN 43). 🧪🔭
apod.nasa.gov/apod/ap24102...
Kiekjes van komeet #Lemmon vanuit Purmerend. @govertschilling.nl @mariekebaan.bsky.social @huubeggen.bsky.social
October 28, 2025 at 7:03 PM
Kiekjes van komeet #Lemmon vanuit Purmerend. @govertschilling.nl @mariekebaan.bsky.social @huubeggen.bsky.social
Stukje #bloomscrolling naar de mensen toe. Het hele huis ruikt ernaar!
October 28, 2025 at 8:25 AM
Stukje #bloomscrolling naar de mensen toe. Het hele huis ruikt ernaar!
Reposted by Esther Hanko
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
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.
Reposted by Esther Hanko
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"?
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."
"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
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"?
Reposted by Esther Hanko
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
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...
Reposted by Esther Hanko
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
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.
For a minute there I thought it said they were covering Celtic Frost but oh well 🤷
This is definitely something good to wake up to
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
For a minute there I thought it said they were covering Celtic Frost but oh well 🤷
Reposted by Esther Hanko
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
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. 🪐🔭
Reposted by Esther Hanko
Voor als je deze herfstvakantie aan het planten slaat...
🚨 Onderzoek: álle gangbare bloembollen bevatten gif – gemiddeld 7 pesticiden per bol, incl. verboden stoffen. Biologische bollen = schoon.
📈 Vervuiling fors toegenomen t.o.v. 2024.
👉 Tijd voor gifvrije teelt!
🌱 #PFAS #bloembollen #gifvrij #biodiversiteit
🔗 www.pan-netherlands.org/blog/2025/10...
📈 Vervuiling fors toegenomen t.o.v. 2024.
👉 Tijd voor gifvrije teelt!
🌱 #PFAS #bloembollen #gifvrij #biodiversiteit
🔗 www.pan-netherlands.org/blog/2025/10...
October 2, 2025 at 7:53 AM
Voor als je deze herfstvakantie aan het planten slaat...
Reposted by Esther Hanko
Folia maakte een fantastische rapportage van ons evenement van zondag 🔭🌒
On Sunday evening, visitors to the Anton Pannekoek Institute were able to witness the full lunar eclipse, the so-called blood moon, up close.
youtu.be/7io6mGtE_kU
youtu.be/7io6mGtE_kU
Kijken naar de maansverduistering: Wat je ziet is iets heel merkwaardigs’
YouTube video by Folia
youtu.be
September 10, 2025 at 8:09 AM
Folia maakte een fantastische rapportage van ons evenement van zondag 🔭🌒