Planets

Learn what scientists mean when they describe a planet as Goldilocks. Hover over the pink, blue and green dots to see some of the planets that researchers have discovered and where they fit in the Too Hot/Too Cold/Just Right spectrum.

The Space Settlement Institute is a non-profit association founded to help promote the human colonization and settlement of outer space.

How do we find Earth-like habitable worlds among billions of galaxies and billions of stars? This video explores what is essential to support life as we know it. Related Lesson

Could human civilization eventually spread across the whole Milky Way galaxy? Could we move beyond Earth to establish colonies out among the stars? This video describes the conceptual von Neumann machine, a self-replicating machine that would be sent out into the universe. Related Lesson

What would it actually be like to live in a colony on Mars? This video details the features of Mars that are remarkably similar to those of Earth — and those that can only be found on the red planet. Related Lesson