What is a ‘ring of fire’ solar eclipse?

What is a 'ring of fire' solar eclipse?

It happens when the moon moves in front of the sun

but doesn’t completely block it out like with a total eclipse

Instead, it leaves a thin halo of light around the edge

It happens because the moon is farther away in its orbit

and so appears smaller

A ‘ring of fire’ eclipse falling exactly in midsummer is very rare

The most recent one happened on June 21, 2020

and won’t happen again until 2039