I work with people and computers. I used to teach Maths and IT to young people between the ages of 11 and 16.
5 Why are there not many detectable supernovas? feb 24 '12
4 What is actually meant by 'sun set' and 'sun rise' times, when taking into account the mirage due to light bending in the atmosphere apr 30 '12
4 Galaxies that are newer than our own one feb 23 '12
2 How to ‘correct’ reflected image on my telescope? mar 27 '12