Astronomical Black and White Glass Slide Collection_Moon Phase how offshore navigators depended on

how offshore navigators depended on it for their lives in wild and dangerous seas until the advent of GPS – and the sextant’s vital role in the history of exploration

Earth and Moon

These strange spherical boulders on the Mendocino Coast in northern California are revealed only during low tide

everything you need from our fantastic World Map placemat

Ten of the charts trace the course of the battle from the first sighting of the Armada to the fight off Gravelines

Astronomical Black and White Glass Slide Collection_Moon Phase how offshore navigators depended onAstronomical black and white glass slide of diagram of Moon's position on star chart over London. The star chart shows the changing position of the Moon against the background stars on two consecutive nights over a London skyline from Westminster Bridge. Artist: Unknown Date: Unknown