Celestial Navigation – Local Hour Angle

Boy today’s study has got me dusting off the cobwebs of my brain. I don’t like maths, and with the added complication of degrees, minutes and seconds… arraggh! So Local Hour Angle – LHA… “What is that!?” I hear you cry. Well let’s find out together…

Celestial Navigation – The Celestial Sphere

Once upon a time people thought that the earth was the centre of the universe and that the sun and stars all revolved around us (sounds a bit like one of my ex-boyfriends). These ancient people started mapping the sun and the stars on to a sphere – the Celestial Sphere – basically it is…