Right now there is a great opportunity to see comet Lemmon for yourself here in the UK, but it will only be visible for a short time.

The 22nd September 2025 is the Autumnal Equinox. In this article I explain what the equinoxes and solstices are, and how they define our seasons.

September 2025 marks twenty years since the first Bahtinov mask design was published by Pavel Bahtinov.