NASA Travel Posters - The Exoplanets "Super Gravity"
by Space Gear
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 time the Earth's mass, its gravitational pull is much, much stronger.
This museum-quality poster is printed on thick, durable, matte paper.
A statement in any room. These puppies are printed on archival, acid-free paper. Printed in America, sweatshop free