Pluto has a tenuous atmosphere consisting mainly of nitrogen, with traces of methane and carbon monoxide. This atmosphere was discovered in 1988 when Pluto passed in front of a star and caused a slight dimming of the starlight. Since then, additional observations and studies, including data from NASA's New Horizons spacecraft, have provided valuable information about Pluto's atmosphere.
However, the atmosphere on Pluto is not stable in the long term due to several factors. Firstly, Pluto's relatively small size and low gravity make it difficult for the planet to retain its atmosphere over long periods. The molecules in the atmosphere can escape into space more easily compared to larger planets with stronger gravitational forces. Additionally, as Pluto orbits the Sun, it moves through regions with varying levels of solar radiation, which can cause the atmosphere to expand and contract.
It is unlikely that an atmosphere similar to Earth's will form on Pluto in the future. The extremely low temperatures, averaging around -375 degrees Fahrenheit (-225 degrees Celsius), make it challenging for gases to exist in a dense and stable form. Moreover, the thin atmosphere on Pluto is not actively replenished by processes such as volcanic activity or biological activity, as far as current knowledge suggests.
However, scientific understanding is continually evolving, and new discoveries may shed more light on the atmospheric conditions and potential changes on Pluto. I recommend consulting more recent sources or contacting a professional astronomer for the most up-to-date information on Pluto's atmosphere.