The phrase "atmosphere escaping" is correct and usable in written English.
It can be used in contexts related to science, particularly in discussions about planetary atmospheres or gas emissions.
Example: "The study focused on the phenomenon of atmosphere escaping from the planet due to its low gravity."
Alternatives: "atmospheric loss" or "gas escape".
In particular, Venus Express will focus on the structure, composition, and dynamics of the Venus atmosphere, escape processes and interaction of the atmosphere with the solar wind and so to provide answers to the many questions that still remain unanswered in these fields.
Astronomers have found several other examples of worlds in the process of being devoured by their stars, or being heated up so much that their atmosphere escapes into space, forming a comet-like tail.
The concentration is low and fairly constant despite the continuous production of new helium because most helium in the Earth's atmosphere escapes into space by several processes.
Scientists said that the second study will allow scientists to explore the way that the solar wind and Mars's atmosphere interact, and find what is keeping that atmosphere from escaping.
The thought was that Pluto's atmosphere was escaping like a comet, but it is actually escaping at a rate much more like Earth's atmosphere".
The detection of X-rays can potentially provide critical information on the rate at which Pluto's atmosphere is escaping into interplanetary space.
He then talks a bit about how the mission is looking into how Pluto's atmosphere is escaping – very quickly, mostly.
Both groups are proposing similar spacecraft to orbit Mars and study why the planet's thin atmosphere is escaping into space.
Researcher Fran Bagenal said that based on models and "a pretty good guess", she expects Pluto's atmosphere is escaping at a rate of about 500 tons per hour, hundreds of times faster than the escape of Mars's atmosphere.
The recent full-simulation by Shuvalov and Artemieva (2002) suggests that the occurrence of the wake has an important role in preventing the ambient atmosphere from escaping because the vapor cloud could go preferentially through the wake.
