Sir: Thank you for alerting me to the lunar eclipse this evening. You say it will be visible to the naked eye and that the Sun, Moon and Earth will be aligned in that order. I can only say I am very pleased that the national curriculum now requires concepts of the 'Earth in Space' to be taught - alas too late for your correspondent?
All lunar eclipses above the local horizon are visible to the naked eye - except in Manchester, where it can be guaranteed to be cloudy - and occur when the Sun, Earth and Moon are lined up in that order.
ALAN C. PICKWICK
Manchester Grammar School