63 What do you think?
Imagine that you are approaching each of our Solar System’s Rocky Planets in a spaceship for the first time. Looking at photos of each of the rocky planets, what similarities do you see at first glance?
![Image of planet Mercury.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-76-mercury.jpg)
![Image of planet Venus.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-77-venus.jpg)
![Image of planet Earth.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-78-earth.jpg)
![Image of planet Mars.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-79-mars.jpg)
Imagine that you are approaching each of our Solar System’s Rocky Planets in a spaceship for the first time. Looking at photos of each of the rocky planets, what similarities do you see at first glance?