It was not inconceivable that a film had drawn over the world wound, a film of Earth-flesh which drew itself over that colossal abyss after our planet had borne its satellite⁠—that world womb did not close when her shining child sprang forth⁠—it was possible; and all that we know of Earth depth is four miles of her eight thousand.

What is there at the heart of Earth? What of that radiant unknown element upon the moon mount Tycho? What of that element unknown to us as part of Earth which is seen only in the corona of the sun at eclipse that we call coronium? Yet the Earth is child of the sun as the moon is Earth’s daughter. And what of that other unknown element we find glowing green in the far-flung nebulae⁠—green as that we had just passed through⁠—and that we call nebulium? Yet the sun is child of the nebulae as the Earth is child of the sun and the moon is child of the Earth.

And what miracles are there in coronium and nebulium which, as the child of nebula and sun, we inherit? Yes⁠—and in Tycho’s enigma which came from Earth heart?