Viscosity is a result of the internal friction of the material's molecules. A visual binary is a binary star pair that are far enough apart to be visible as separate objects. The lower the number, the brighter the object. Negative numbers indicate extreme brightness. We can see objects up to 6th magnitude without a telescope.
Apparent magnitude is abbreviated m.
It is the most sensitive radio telescope in the world. VMO VMO is short for Very Massive Object. VMO's are over 100 times more massive than our Sun . Black holes , for example, are VMO's. They transmitted images of the outer planets and their moons back to Earth.