Lao

This stunning video shows remarkable and mysterious details near the dark central region of a planet-sized sunspot in one of the sharpest views ever of the surface of the Sun.

The video was made using the Swedish Solar Telescope. Along with features described as hairs and canals are dark cores visible within the bright filaments that extend into the sunspot, representing previously unknown and unexplored solar phenomena.

The filaments' newly revealed dark cores are seen to be thousands of kilometers long but only about 100 kilometers wide. Resolving features 100 kilometers wide or less is a milestone in solar astronomy and has been achieved here using sophisticated adaptive optics, digital image stacking, and processing techniques to counter the blurring effect of Earth's atmosphere.

One of my favorite NASA's Cassini shots. Created using still images taken by the Cassini spacecraft during its flyby of Jupiter. Shown are Io and Europa over Jupiter's Great Red Spot.