#100HoursOfAstronomy
Spent a wonderful but exhausting day at Onsala Space Observatory preparing the planetarium and the show. On Saturday we’re doing it! #100HoursOfAstronomy #IAU
September 30, 2025 at 6:10 PM
I have just captured this image of the Sun during the Slooh Star Party: 100 Hours of Astronomy.
#slooh #sloohshare #solarsystem #100hoursofastronomy
October 1, 2026 at 9:52 PM
A great start to 100 Hours of Astronomy with challenges completed all over the UK. Still 3 more nights to get friends and family involve simply by visiting 100hours.online on your smartphone.

#100HoursOfAstronomy #100Hours #stargazingcountdown #StarryNights #selfcare
October 2, 2026 at 9:06 AM
Today we got our revenge on the storm that forced us to cancel the Day & Night of #Astronomy and #100HoursofAstronomy at Onsala Space Observatory. This is inflatable planetarium where I held 7 presentations today and look - they made a roll-up banner of my artwork! 👩‍🚀🌍✨
October 18, 2025 at 6:15 PM
100 Hours of Astronomy: Theme for 2026 "A New Perspective on the Solar System"
I took this image through Slooh's new Canary Six Lunar telescope and zoomed in on the very bright crater Aristarchus
Slooh #sloohshare #100HoursOfAstronomy #moon #onlinetelescope
October 2, 2026 at 11:39 AM
I am disappointed beyond all recognition! Due to an incoming storm, our event at the Onsala Space Observatory has been cancelled! I have no words other than... "Why can't we cancel the mf:ing storm instead?!" 🤬

#100HoursofAstronomy #IAU
October 3, 2025 at 12:10 PM
#100hoursofastronomy The AstropotaPOD (@pod.astropotamus.com) is live! Streaming the Pacman Nebula, NGC 281, until it gets light! Come see what happens when live #Astrophotography meets an almost full moon!

www.youtube.com/watch?v=fKgr...
Live Astrophotography from the AstropotaPOD
YouTube video by Astropotamus
www.youtube.com
October 5, 2025 at 1:18 AM
October 2, 2024 at 9:24 PM
As soon as Storm Amy says goodbye, @bathastronomers.org.uk will be out to do some pop-up observing in the city to support both #100hoursofastronomy #100hours but also International Observe the Moon Night.

You've got to go big at the start of World Space Week haven't you!! 🌔🔭
October 3, 2025 at 6:28 AM
Do you have clear skies? Look up after dark! 100hours.online is now LIVE - simple stargazing challenges for everyone. Win badges and put a pin on our map (don't worry you don't need to register or give your exact location). #100hoursofastronomy #100hoursunderonesky #stargazing #astronomy 🔭
October 2, 2024 at 6:04 PM
Astronomy Picture from 02/04/2009

100 Hours of Astronomy Begins

Source: https://apod.nasa.gov/apod/ap090402.htm<a href="/hashtag/100HoursOfAstronomy" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#100HoursOfAstronomys#Galileo##Astronomys#Spacey#ISSa#Discoveryi#NightSkyN#Stargazinga#Telescopee#Observatorye#Hungary##VeszpremVeszprem
April 19, 2025 at 1:19 PM
This outreach activity, held in participation with the #100HoursOfAstronomy Global Initiative, provided students and the local community with an educational opportunity for safe solar viewing.

#ESSS #DambiDollo #IAUOutreach #SpaceScience #Ethiopia #STEM
October 7, 2025 at 6:43 AM
Be part of the global 100 Hours Under One Sky #stargazing event, a free non-profit project led by UK’s IAU

✨ #Astronomy #space #stars #100HoursUnderOneSky #100HoursOfAstronomy
100 Hours Under One Sky
Try four simple stargazing challenges to win badges in our new UK 100 Hours event
100hours.online
September 28, 2024 at 10:16 AM
Hoy estaré en el bloque de las 12 pm (hora del centro de México) platicando sobre diversidad, inclusión y equidad en la Astronomía en esta transmisión continua de 24 horas celebrando los 100 años del planetario y las 100 horas de Astronomía. www.youtube.com/live/iC2pCZt...

#100HoursOfAstronomy
100 Hours of Astronomy | 24 Hours of the Planetarium | Stream #4
YouTube video by IAU Office for Astronomy Outreach
www.youtube.com
October 4, 2025 at 5:55 PM
Register your event to be part of #100HoursOfAstronomy Global Outreach Project!

docs.google.com/forms/d/e/1F...
October 2, 2023 at 1:21 PM
Have you already tried the lnternational Code Hunting Game? 🗺️📌

If not, last Friday we played online with our colleagues from @mediainaf, @NAEC_Chile and @ZCosmolab!

You can watch the video here
👉#100HoursofAstronomy

x.com/mediainaf/stat… youtube.com/watch?v=ygVLD4…
International Code Hunting Game
On the occasion of 100 Hours of Astronomy, the Italian National Institute for Astrophysics (INAF) organises a livestream event with guests from several countries presenting the International Astrophysical Code Hunting Game, the first virtual treasure hunt around more than 300 astronomical locations worldwide. The livestream will take place on Friday 1 October, 18:00 CEST (16:00 UTC). To play the game, users need a smartphone, tablet or computer, a QR code reader and the Telegram app. The International Astrophysical Code Hunting Game is an online game that promotes digital skills and computational thinking while at the same time disseminating knowledge about places around the world – observatories, research centres, planetaria, historical landmarks, and more – where it is possible to observe the sky and make sense of the Universe. It was developed by INAF together with University of Urbino and Digit Srl and launched on 24 September 2021. The worldwide map of astronomical locations was created thanks to the collaboration of dozens of colleagues around the world, including many IAU National Outreach and Astronomy Education Coordinators. Let's start playing: https://play.inaf.it/en/international-code-hunting-game/
www.youtube.com
March 27, 2025 at 1:23 PM
Aunque las 100 horas de Astronomía ya terminaron, siempre pueden disfrutar de las 100 curiosidades astronómicas de #UniversoMexicano

#100HoursOfAstronomy

youtube.com/shorts/FjufY...
#UniversoMexicano - Astronomía inclusiva- Anaely Pacheco Blanco
YouTube video by Astronomia y Comunidad
youtube.com
October 9, 2025 at 11:13 PM
¡Ven y cruza el primer puente al Cosmos! www.youtube.com/live/UQW31dw...

#100HoursOfAstronomy
Puentes al Cosmos Sesión 1
YouTube video by Astronomia y Comunidad
www.youtube.com
October 3, 2025 at 2:25 AM
Here are five things to talk about and look for during #100HoursOfAstronomy:
1. The Moon
2. Mars
3. The Winter Hexagon
4. Orion
5. The Big Dipper / Plough & Polaris
#space #astronomyoutreach

scottastronomy.wordpress.com/2019/01/10/100…
November 30, 2024 at 5:43 PM
100 Hours Astronomy
2-5 October 2025

Join the global celebration of Astronomy

#100HoursofAstronomy, #100YearsofthePlanetarium and #IAUOutreach
August 26, 2025 at 1:33 AM
On Friday, October 3, 2025, the Ethiopian Space Science Society (ESSS), Wollega Branch, collaborated with the Wollega University Physics Department for an event celebrating the #100HoursOfAstronomy global initiative.

#ESSS #WollegaBranch #WollegaUniversity #AstronomyOutreach #100HA #STEM #Ethiopia
October 8, 2025 at 2:59 PM