Meanings of minute of arc in anglès

The true meridian can thus be found within one minute of arc:

Helmholtz has defined the minimum angle measurable with the naked eye as being one minute of arc.

The human eye can't resolve any object that subtends less than three minutes of arc.

We've lost about two minutes of arc.

This has an aperture of five inches, a power of thirty diameters, and a field of view of seventy-eight minutes of arc.

That is to say, reduced to modern terminology, he places the limit of the sun's apparent size between thirty-three minutes and twenty-seven minutes of arc.