Readers ask about Saturn’s icy rings, transparent fish and more

Icy hot

Ice particles from Saturn’s rings are falling into the planet’s atmosphere. In part because the particles vaporize, energy is released, heating up and making the sky glow at ultraviolet wavelengths, Ken Croswell reported in “Saturn’s icy rings may bring the heat” (SN: 5/6/23 & 5/20/23, p.