eclipse

On Monday (8th April), there was a total solar eclipse. Sadly you could only see this if you were in North America – here in the UK it was only a partial (described as a ‘small grazing’ on one website I saw). I didn’t manage to see any of it, but it did get me wondering – where does the word ‘eclipse’ come from?

These days, ‘eclipse’ refers to the partial or complete obscuring of one celestial body by another, or the shadow cast by one celestial body on to another. We also use it metaphorically to describe someone or something being overshadowed by something else.

‘Eclipse’ comes from ancient Greek, from ‘ekleipsis’, meaning ‘an abandonment’ or ‘a failing’, to reflect those poor old ancient Greekies being abandoned or failed by the sun or moon. Over time, the word was adopted into Latin as ‘eclipsis’, then into Old French as ‘eclipse’, before finally making it to Middle English as, you’ve guessed it, ‘eclipse’.

Eclipses have long been viewed with some superstition, and there have been various odd things that have happened during them. Here are just a few.

• The Battle of the Eclipse (585 BCE): One of the earliest recorded instances of an eclipse influencing human affairs happened during this battle between the Lydians and the Medes in what’s now Turkey. According to the ancient Greek historian Herodotus, there was a total solar eclipse in the middle of the fighting, which both sides took as a sign to stop battling and make peace. So that’s nice. On the flipside, during the Battle of Muye (c. 1046 BCE) in ancient China, a total solar eclipse terrified the soldiers, causing panic on both sides. It’s thought that one side (the Zhou) used this to their advantage to boost morale, claiming it was some sort of divine favour, and went on to defeat the Shang dynasty.

• The death of Henry I (1133): The OG Hazza died from eating a shitload of lampreys, a type of jawless fish (yum), during a feast. His death also coincided with a total solar eclipse which many people took as a portent of his impending demise, or as a sign of divine displeasure at all those poor fish he ate.

• The New Madrid Earthquakes (1811–1812): This was a series of powerful earthquakes – in fact, some of the most powerful ever recorded in the contiguous United States (I had to look up what that means – it’s all the states that are connected to each other, i.e. the 48 adjoining states on the North American continent – so it doesn’t include Alaska and Hawaii). The earthquakes happened during a time of heightened celestial activity, including multiple solar and lunar eclipses. There’s no scientific connection here but it must have brown trousers all round for anyone in the middle of them.

steganography

Steganography is the practice of hiding a secret message inside another message or a physical object that isn’t secret. Think Tim Messenger, Adam Buxton’s character in the film ‘Hot Fuzz’ (one of my all-time favourites) who hides messages in misspelt newspaper headlines about what’s going on in the village of Sandford (‘He’s Judge Judy and executioner!’). Other examples of steganography include invisible ink or playing a record backwards to reveal a hidden message.

Steganography is action – if you look at the first image under white, blue, green and red lights you see different hidden numbers (not that well-hidden, but still).

Etymology time (my favourite time). ‘Steganography’ comes from the Greek word steganographia. That’s made up of steganós, meaning ‘covered or concealed’, and ‘-graphia’ meaning ‘writing’. The first recorded use of the term was in 1499 by one Johannes Trithemius (amazing name) who wrote a book called ‘Steganographia’. It was a treatise on cryptography and steganography disguised as a book on magic.

The advantage of steganography over cryptography – i.e. converting text into something unintelligible so only someone who has the key or cipher can convert it back – is that the secret message doesn’t attract attention because it’s hidden in something else. So while cryptography is just about protecting the contents of a secret message, steganography hides the fact that there’s a message at all.

The earliest recorded use of steganography was in 440 BC in Greece, which Herodotus (writer, philosopher and all-round clever dude) mentions in his book ‘Histories’ (an account of the Greco-Persian Wars). A ruler by the name of Histiaeus sent a message to a minion about an upcoming revolt by shaving the head of a servant, tattoing the message on to his scalp, then sending him to deliver it once his hair had regrown. Obviously there are a lot of issues here, not least that hair growth takes a long time. Oh, and you need a new servant for every message.

Today steganography has moved on a bit. The word is commonly used to descibe the ways hackers infect people’s computers i.e. by hiding nasty bits of code in common-or-garden documents like PDFs. Then when you open the doc it installs a horrible bit of malware or ransomware on your PC. Bastards.

Warning: contains a lot of blood and some swearing (just a ‘wanker’).