Here I say, "And under that wouldn't be rock, but a form of high-pressure ice, like ice IX." 

I used ice IX to refer to the general category of high-pressure ices because it's a familiar term from Kurt Vonnegut's *Cat's Cradle*, but if GJ 1214b, the planet I'm discussing here, is in fact a water world, its most likely form is ice VII (and possibly ice X) due to the planet's predicted interior temperatures. See the upper left of this [water phase diagram](http://ergodic.ugr.es/termo/lecciones/water1.html).

Sara Seager: Pencarian planet di luar sistem tata surya kita

Pencarian planet di luar sistem tata surya kita

Setiap bintang yang kita lihat di langit punya setidaknya satu planet yang mengelilinginya, kata astronom Sara Seager. Jadi apa yang kita ketahui tentang planet-planet luar surya ini, dan bagaimana kita bisa mengenal mereka dengan lebih baik? Seager memperkenalkan sekumpulan planet luar surya favoritnya dan menunjukkan teknologi baru yang dapat membantu mengumpulkan informasi tentang planet-planet ini – dan bahkan membantu kita mencari planet luar surya dengan kehidupan.

Recent discoveries reveal that every star in the night sky hosts at least one planet, and the Milky Way alone teems with billions. Astronomers are now on the brink of identifying planets with conditions similar to Earth. Using innovative tools like the starshade, researchers are developing ways to study distant atmospheres for signs of life. This search may soon answer humanity’s oldest question: are we alone in the universe.