outermost

The difference between the speed of the fast and slow solar wind is thought to be due to the different areas of the Sun's corona, the outermost layer of its atmosphere, that they originate from.

In a paper appearing in Nature, researchers at MIT, the University of Edinburgh, and elsewhere find that the sun's magnetic field could arise from instabilities within the sun's outermost layers.

There, in the outermost layer of the brain, 20 billion neurons process countless sensory perceptions, plan actions, and form the basis of our consciousness.

If you’re propping your smartphone up against a telescope or binoculars, it’s essential a solar filter is put on the outermost lens of the latter.

People using binoculars, camera lenses and telescopes need to mount proper solar filters on the outermost lenses receiving light, filtering the powerful rays before they enter the device.