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Error Detection ← Computer Science Unplugged The world is noisy place, and errors can occur whenever information is stored or transmitted. Error detection techniques add extra parity bits to data to determine when errors have occurred. This activity is a magic trick which most audiences find intriguing. In the trick the demonstrator is “magically” able to figure which one out of dozens of cards has been turned over, using the same methods that computers use to figure out if an error has occurred in data storage. Additional resources:Mordechai (Moti) Ben-Ari from the Weizmann Institute of Science, Israel has programmed the Error Detection and Parity Unplugged activity in Scratch which can be downloaded in a zip file of the complete set of activities. Please read the ReadMe.txt for documentation.

DIY: Wearable words When I was looking around for tutorials on making paper beads, I found some really striking "book beads" and accessories, now collected in this post. I understand (after all the browsing) that you can make really durable "beads" easily ... very little time, skill or money required. Woohoo! Who doesn't need more jewelery? (UPDATE 6/12: See the follow up post for more wordy accessories) Studios Under Construction Here is a picture of one of the HEAVY window covers on the wall. It took two strapping young men to get it up there! This picture shows the boxes that became slot resonators for the side walls. Here's the slot resonators after I "finished" them. I still need to figure out trim pieces, etc. to make them look better, but my first priority is to get the audio going, then I'll work on some more of the physical beauty. Here's a picture of the Ultimate DIY diffusor - aka bookcase.

Binary Numbers ← Computer Science Unplugged The binary number system plays a central role in how information of all kinds is stored on computers. Understanding binary can lift a lot of the mystery from computers, because at a fundamental level they’re really just machines for flipping binary digits on and off. There are several activities on binary numbers in this document, all simple enough that they can be used to teach the binary system to anyone who can count! Generally children learn the binary system very quickly using this approach, but we find that many adults are also excited when they finally understand what bits and bytes really are. Activity description (PDF) Instructions for Binary Numbers activity (English)

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Ambassador Summary The IAU Dark Skies Ambassadors is a program that invites keen enthusiasts worldwide to be dark sky advocates and spread the word of the concern of light pollution. Dark Skies Ambassadors organise actions, get others to do events and/or do events, and help advertise events. Joining the program could also create a peer-supporting environment and provide visibility of events. Who can join?

Origami Christmas Tree And finally I managed to post this origami tree tutorial...for those who follow me on instagram, you know I've made these last week. So if you wanna know how to make this.... Inspiring Stars & Stars Shine for Everyone Telescope Collaboration [News UPDATE]: Deadline for submissions extended to June 1, 2020. In 2020, and following the much successful collaboration during the IAU100 celebrations, we will team up once again with the Belgian initiative Sterren Schitteren voor Iedereen (Stars Shine for Everyone - SSVI) and Leiden University/Universe Awareness (UNAWE) to distribute 15 telescopes to underserved communities around the world. The telescopes were signed by astronauts and scientists including three Nobel Prize winners, with the help of newscientist.nl. The SSVI project is a cooperation between Volkssterrenwacht A.Pien vzw (Public Observatory Armand Pien) and Ghent University. The project is based on the idea that ”All children in special education and vulnerable people should have the opportunity to admire the starry sky with the help of a telescope.” says project leader and founder Jean-Pierre Grootaerd.

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