HD 40307g Poster Print T-Shirt from NASA

HD 40307g Poster Print T-Shirt from NASA's Visions of the Future.

Twice as big in volume as the Earth, HD 40307g straddles the line between "Super-Earth" and "mini-Neptune" and scientists aren't sure if it has a rocky surface or one that's buried beneath thick layers of gas and ice. One thing is certain though: at eight times the Earth's mass, its gravitational pull is much, much stronger.

• Fits and feels like a favorite t-shirt
• 100% super soft combed ringspun cotton 
• Slightly fitted men's/unisex tee
• Printed with water based inks for a soft feel
•  Available on Black, Red, White, or Gray Tee.

 **Please check sizing chart for your best fit **