Sodium Nebula

In 1989, Boston University Professor Michael Mendillo and his collaborators discovered the largest permanently visible object in the Solar System – the great sodium nebula at Jupiter (50 million miles in diameter).  Using the instruments designed and built at Boston University, they then discovered the enormous extent of the Moon’s weak atmosphere.  If bright enough to be seen by the unaided eye, these giant gas clouds surrounding Jupiter and the Moon would appear as large as twelve full moons, edge-to-edge.

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