Definition of ursa major in English English dictionary
A large circumpolar constellation of the northern sky, said to resemble a bear. It includes the familiar asterism the Big Dipper and the stars Mizar, Dubhe, and Alkaid
My father compounded with my mother under the dragon's tail, and my nativity was under ursa major.
a large constellation (=group of stars) near the North Pole, which can easily be seen from Earth. The seven brightest stars in Ursa Major are called the Plough (in the UK) or the Big Dipper (in the US)