Earth
Water has been found on the surface of Mars. There are traces of oxygen, which is also a component of water, in the Martian atmosphere.
oxygen....
Yes Mars has oxygen.
Oxygen makes up about 21% of Earth's atmosphere. It is also found in various forms in water, rocks, and living organisms on the planet.
Earth is only one planet where gaseous oxygen is found. The Earth's atmosphere is about 21% Oxygen.
So far, we can only speak for our own planet, Earth; we're not aware of any other planet with either plant life or large quantities of free oxygen. On Earth, oxygen is produced by plants, which take in carbon dioxide and secrete oxygen, much as animals breathe in oxygen and breathe out carbon dioxide. We really are in symbiosis with our planet.
Yes. There is one planet with oxygen in its atmosphere: our home planet Earth.
There's not much oxygen on any planet except Earth. I mean "free" oxygen, not chemically combined with other elements. Obviously carbon dioxide contains oxygen combined with carbon, for example.
It has trees, and trees provide Oxygen. Another viewpoint: The fact is that, as of now (January 2013), Earth remains the only planet we know that has any significant amount of oxygen in its atmosphere. As far as we know this can only happen through biological activity. So if a lot of oxygen is found on another planet that would be a very strong indicator of life. That's why it will be big news if it happens. <<>> Free oxygen occurs in the atmosphere because it was manufactured by anerobic bacteria, which separated out the carbon and the oxygen from carbon dioxide by photosynthesis, thus paving the way for animal life (free oxygen does not occur through evaporation).
Earth's atmosphere contains a unique abundance of free oxygen, which is not found in significant quantities on any other planet in our solar system. This oxygen is produced mainly by photosynthesis from plants, making Earth's atmosphere distinct and supporting a wide variety of life forms.
If they do we have not found them.
Earth is the only planet known to have a significant amount of oxygen molecules in its atmosphere.