* Astronomy

Inchgarvie lies beneath the Forth Rail Bridge, where the channel narrows to just 1.5 kms wide between North and South Queensferry.
Steep cliffs plunge down into deep canyons gouged out by glacial ice more than 10,000 years ago.
A craggy island of hard rock rears up between, with its long volcanic tail leading down to vast plains of softer sediments.
America's Grand Canyon and Africa's Great Rift Valley may have nothing to fear, but travelling over the Firth of Forth will never be the same again.
The remarkable picture of what lies beneath one of Scotland's most famous and historic crossings has been created by the British Geological Survey in the first stage of plans to map the underwater features of the entire UK coastline.
Multi-beam sonar equipment mounted on board a catamaran was used to create the most detailed images ever produced of the bottom of the Forth Estuary at its narrowest point, before it opens out towards the North Sea.
The Forth estuary was gouged out during the last ice age when Scotland was completely covered in ice sheets. Glaciers moving towards what is now the North Sea came to a narrow pinch point between the hard volcanic rocks at what is now North and South Queensferry. Here the rocky outcrops are just over a mile wide and the glaciers had to squeeze between to get through, and as a result they flowed faster and deeper, gouging out the channels - up to 75 metres deep in some parts - but leaving Inch Garvie, made of similar hard rock, largely intact. As the glaciers melted, the valley left behind gradually filled up to present-day levels.

"Until now we haven't known what lies under this part of the Firth of Forth in any great detail. Now we can pick up the underwater rock structures and see the real structure of islands like Inch Garvie. Everyone is familiar with the crag and tail on which Edinburgh Castle and the Royal Mile are located. What they don't realise is there is a similar rock structure out in the Firth of Forth with Inch Garvie on top"  - Christian Wilson, BGS's Edinburgh-based marine geologist.

The BGS team believe they may have identified some man-made structures on the seabed that could date from 7,000 years ago at a time when the estuary was still filling up.

Source The Scotsman

The name 'Inch Garvie' is probably originally of Gaelic derivation, from Innis Garbhach, meaning 'rough island'.

Latitude:, 56.0001°N, Longitude:, 3.3837°W