Earth is the only known planet with an oxygenated atmosphere.
Because it is the only planet that we know of having a atmosphere
Mercury, the known planet that orbits closest to the sun, has no atmosphere.
No. No. The only planet n contact with Earth's atmosphere is Earth itself.
No. Mercury essentially has no atmosphere. Earth is the only planet with an atmosphere that humans can breathe.
Why would there be only half a planet?
Mercury.
jupiter
That would be earth
Mars
The planet Mars is the only planet known with two moons and a predominantly CO2 atmosphere.
Earth. It's the only planet with significant amounts of oxygen in the atmosphere, making up about 21%.