angular momentum = mass &#215; velocity &#215; distance (from point object is spinning or orbiting around) Very often in astronomy, the object (or group of objects) we're observing has no outside forces acting on it in a way to produce torques that would disturb the angular motion of the object (or group of objects).
(torques; would disturb; the angular motion of the object (or group of objects) (the object (or group of objects; 're observing; we) (the object (or group of objects) we're observing; has; no outside forces acting on it in a way) (no outside forces; acting; on it)
torques the object (or group of objects the object (or group of objects) we're observing no outside forces
would disturb 're observing has acting
the angular motion of the object (or group of objects
we
no outside forces acting on it in a way
on it