From Ron Baker
Well before the next transit of Venus is seen from Earth, 105 years from now (2 June, p 44), we shall, I hope, have observatories in various parts of the solar system. So, when will it be possible to observe a transit of Earth or Venus from Mars?
The editor writes:
• Not sure about Mars, but something similar is planned for later this year – the transit of Venus as seen from Saturn (9 June, p 4).
Colchester, Essex, UK
