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.
- Measures Approximately 11'' x 17''
- High Quality Print with Glossy Finish
- Makes a Great Gift
- Made in the USA
- Courtesy NASA/JPL-Caltech