Today is Plough Monday - a very old English holiday (no longer observed) which marks the start of the agricultural year. The symbol of the plough is a very important one - and should not be overlooked, for the term 'Aryan' meant 'one who works the plough'. This is from the PIE root Are/Ara. The Welsh word Arddu (to plough) may even cognate with the word Erda - the Earth.
The constellation of Ursa Major partly represents the plough and was known to the Norse as Arþr, which is the root of the name 'Arthur's Wain', a christianised version of 'Woden's Wain' - a Saxon name for the constellation of the Plough.