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.
MercuryPublic Domain | Image courtesy of NASA / JPL-CALECH.

Image of planet Venus.
VenusPublic Domain | Image courtesy of NASA / JPL-CALECH.

Image of planet Earth.
EarthPublic Domain | Image courtesy of NASA / ESA.

Image of planet Mars.
MarsPublic Domain | Image courtesy of NASA / JPL-Caltech.