None of the planets we know have a complete snow covering; Earth has only a partial and seasonal snow covering for only a fraction of its land area. Saturn's moon Enceladus (which is not a planet) comes close as it is known to have water geysers because of subsurface liquid water - some of which water falls to the surface as snow, and some escapes into space. The outer planets also have some amount of water ice in their atmosphere, although the effect would not dominate enough to be described as being covered with it.
An avalanche is like a rockslide, but on a snow-covered mountain.
A landscape covered in snow is called a winter wonderland. Snow-covered landscapes are often serene, beautiful, and peaceful, creating a magical and picturesque environment.
Earth
Yes, Pluto's thin atmosphere consists of nitrogen, methane, and carbon monoxide gases that can freeze and fall to the surface as snow when temperatures drop low enough. This unusual snowscape gives Pluto its unique and striking features.
Saturn is the planet that will answer your question
Hoth
What snow planet?
About 3/4 of a billion years ago ... the ice-ball (or snow ball) Earth, when the entire planet was covered in snow & ice, the seas frozen.
In usual text, snow-covered would probably be hyphenated - otherwise the sentence could be misinterpreted - consider the difference between the concept of "snow-covered mountains" and the sentence "snow covered mountains".
Because it's covered by a snow cap
An avalanche is like a rockslide, but on a snow-covered mountain.
Because it's covered by a snow cap
Pure As the Blood Covered Snow was created in 2003.
steep snow-covered hill, and a trigger
Snow-clad; snow-covered.
A landscape covered in snow is called a winter wonderland. Snow-covered landscapes are often serene, beautiful, and peaceful, creating a magical and picturesque environment.
That's a really difficult a question. In British English either is equally correct though they can have subtle differenced in meaning which I am finding difficulty explaining. Of course you have the third variant which is "Covered 'in' snow".I'm sure that somebody else can describe it in technical terms. But my understanding as a natural English speaker is....Covered 'by' snow kind of infers that this action has recently occurred.e.g. The parked car was covered by snow.Covered 'with' snow kind of infers that the object has not recently been covered.e.g. The parked car was covered with snow.Covered 'in' snow is kind of descriptive.e.g. The parked car was covered in snow.You know what I don't think it matters, choose one and use it,