On Wednesday, one of the astronauts of the International Spacecraft photographed a photograph showing a bright orange light surrounding the Earth's horizon. This orange light is known as the glow of the highest layers of the atmosphere caused by radiation.
This glow is generated when the molecules in the atmosphere are filled with sunlight and ultraviolet radiation emitting the sun. When the atoms reach the radiation, they start to move faster, and when they collide, they release energy in the form of light. The result is glimmering above the Earth's horizon.
The photo is taken from Australia, and is headed by a cosmic station, but in the background there is orange light, millions of stars and clouds of the Earth.
This glow allowed explorers to look at how Earth's atmosphere works, ie as particles that enter the universe from Earth's interaction with Earth's atmosphere.