The full Cold Moon will be visible on Thursday 4 December.
It is another supermoon, the third of 2025 and the last.
Supermoons are not that rare, there are usually three or four a year, but it is unusual to have three of them in a row – four if you count the first full Moon of 2026 too.
They occur when the Moon is “in perigee”. That’s to say the full Moon coincides with it being at its closest point to Earth in its orbit, appearing larger and brighter in the night sky.
A full Moon happens when the Sun and Moon are on opposite sides of Earth – in alignment, known as ‘syzygy’ – so the whole side that is facing us is illuminated.
