Albireo is an unusual double star in the constellation Cygnus, the Swan: one star is blue and the other is golden. Used as the basis for the primary of the Carotian Union in a composite photo on the website of the book The Chalice of Life
In science a theory is based upon knowledge and thoughts to explain a phenomenon. It is an educated assumption.
Once a theory has been proven time and again and the information is believed to be accurate and true it is considered to be fact.
A newton is a unit of force equal to the force needed to accelerate a mass of 1 kilogram meter per second. This unit is named after Sir Isaac Newton.