(1) Please go online and find a website which features details of the atmosphere of any non-gaseous planet in the solar system (except the earth) . Post the URL of the website, and provide a concise description of the essential data. You may also consider a large moon, such as Io (for Jupiter). You need to know the acceleration of gravity on the surface of the planet/moon and its radius, from which you find the escape velocity. You also need to know its surface temperature.
(2) Do a calculation of the rms speed of the oxygen molecules on the surface of the planet/moon, and compare that with the escape velocity. Is the planet/moon able to hold on to oxygen in its atmosphere? Check your result with the actual content of the atmosphere. Provide the essential steps.