Planetami

Planetami is a fictional exoplanet frequently used in educational materials and science fiction to illustrate planetary habitability and climate dynamics. It serves as a representative Earth-like world for experiments with atmospheric models, ocean dynamics, and the effects of orbital parameters on climate.

In common depictions, Planetami orbits a sun-like star in the habitable zone, with a semi-major axis near 1 astronomical unit and an orbital period close to one Earth year. It is described as a terrestrial planet with a radius about 1.15 times that of Earth and a mass around 1.8 Earth masses, yielding a surface gravity near 1.1 g. The planet is often portrayed as having abundant surface water, with oceans covering roughly 60–70 percent of the surface and diversified landmasses.

The atmosphere is typically nitrogen-dominated with trace greenhouse gases, resulting in a surface pressure near 1 bar. The climate is portrayed as temperate, with seasonal cycles influenced by moderate axial tilt and oceanic heat transport, which help stabilize temperatures and moderate extremes.

Habitability discussions around Planetami focus on potential biosignatures from oceanic microbial life and possible land-based ecosystems near coastlines, depending on atmospheric composition and tectonic activity. The world is also used in simulations to study the impact of ocean coverage, greenhouse gas variability, and solar forcing on long-term climate stability.

Etymology and usage: the name blends a reference to "planet" with a friendly suffix, and the scenario circulates in textbooks and sci-fi as a conventional example of Earth-like habitability. See also exoplanet, habitable zone, ocean world.