The planet Earth has a sufficiently large mass, and correspondingly large gravitational field, to enable it to hold on to a large atmosphere.
X-rays are man made, so no.
the sky is so big because it is called the atmosphere.
how big is the worlds biggest kinfe? Well there is a lot of knives in the world and every second new ones are produced,and some people produce their own knives so no one really knows what is the worlds biggest kinfe and how big it is. (: from zackmang1
Ozone
As big as my nuts:)
As big as mines
Higher concentrations of oxygen in the atmosphere and prosperity
Very very big ! ! ! ! The average blue whale is 100ft. long so it would be longer than 100ft.
as big as your mom.
65ft
Its big, it has an atmosphere, and there seems to be liquids on the surface.
as big as your mom (thats pretty big, you know)