EARTH Explore Unfamiliar Worlds in Planet Explorers Begin your adventure on planet Earth and discover what makes our world so unique and special. Board a rocket to the mysterious Planet X and explore its surface. What similarities will this far, far away planet share with our home planet Earth? View Earth like an Astronaut in Welcome to the Universe Leave the Earth behind you and tour some of the most intriguing destinations in space. Expand your horizons with our 3D presentation of Welcome to the Universe, playing in the Samuel C. Johnson Star Theater. Investigate OCEAN LIFE WITH Seafloor Explorers You’ve explored the surfaces of distant planets, now it’s time to explore Earth’s own ocean floor. Scientists need your help to identify different species and ground cover with the citizen science project seafloorexplorer.org.