"invisible planet" is a correct and usable phrase in written English.
You can use it when you're talking about a foreign place, or a hidden or mysterious part of a world. For example, "The inhabitants of the invisible planet were unknown to us until recently."
We know more about the naming of the "invisible" planets.
Invisible Planets, edited by Ken Liu, is out now from Head of Zeus.
There is NPR, of course, and intelligent podcasts too; there were some smart questions on both Invisible Hands and Planet Money.
It means that NASA is apparently actually currently already able to redirect an invisible Babylonian rogue planets bent on destroying the earth away from it's prophetic vector.
The spacecraft had crossed from interplanetary space into Saturn's magnetosphere, a region bounded by an invisible bubble enveloping the planet and most of its satellites.
The planet's invisible beast – it made hideous footprints in the dust as it came thumping on inexorably to attack our boys – was a brilliant notion.
The panel's 1965 report, "Restoring the Quality of Our Environment," included an appendix on "Atmospheric Carbon Dioxide," laying out, with much alarm, the consequences of "the invisible pollutant" for the planet as a whole.
But the fear, such as it was, seemed to give way to a feeling of good fortune, as though we'd been visited by invisible aliens from a planet where breakfast is served twenty-four hours a day — a place, in fact, not unlike this one.
Despite being a country of superlatives – most populous Muslim-majority nation, biggest exporter of numerous commodities dug or grown out of its generous earth, one of the world's most enthusiastic users of Twitter and Facebook – Indonesia also remains, in the words of Indonesian businessman John Riady, the biggest invisible thing on the planet.
But the fear, such as it was, seemed to give way to a feeling of good fortune, as though we'd been visited by invisible aliens from a planet where breakfast is served twenty-four hours a day a place, in fact, not unlike this one.
