Non-mixing layers of water and hydrocarbons thousands of miles deep could explain the icy planets’ strange magnetic fields.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Tidal information supplied by the UK Hydrographic Office. For more information, please see FAQs.

The links below take you to web pages where you can access PDF files of annual tide-tables. These can be printed for personal use or used in publications, subject to the conditions as stated on these ...