Astronomy Sweatshirt — Io: The Ultimate Volcanic Party

Io, one of Jupiter's moons, stands out as the most volcanically active body in our solar system.

Discovered by Galileo Galilei in 1610, Io's intense volcanic activity is driven by tidal heating — gravitational interactions between Jupiter and its neighboring moons Europa and Ganymede create immense internal friction and heat. This constant flexing causes Io's surface to erupt with spectacular volcanic activity.

Understanding Io's volcanic behavior helps scientists gain insights into the dynamic forces that shape planetary bodies and their evolution.

Celebrate the incredible science behind Io's volcanic activity with this sweatshirt!

Perfect for: Astronomy enthusiasts, planetary science students, space science lovers, NASA fans, and anyone fascinated by the extreme volcanic activity of Jupiter's moons.

Fit / Fabric / Construction

Unisex fit
100% ring-spun cotton: A lightweight, soft-style, breathable fabric
Seamless construction: Knit in one piece using tubular knit, reducing fabric waste and enhancing the garment's aesthetic
Ribbed knit collar: Offers high elasticity and helps the collar retain its shape
Shoulder tape: Twill tape reinforces the shoulder seams to stabilize the back of the garment and prevent stretching

Care Instructions

Machine wash - warm (max 40C or 105F)
Tumble dry - low heat
Iron, steam or dry - low heat
Don't bleach or dry clean

Shipping / Returns

Free standard shipping in the United States.
Made to order: please allow 3–5 business days for production.
U.S. delivery: typically 7–10 business days after production.
International delivery: typically 10–20 business days after production; customs processing may add time.
Returns: request a return within 30 days of delivery for eligible unworn, unused items. Gift cards and personalized items are not returnable. Read our Return Policy.