Astronaut Thomas Pesquet captured from ISS the airglow. The orange hue enveloping Earth is known as airglow—diffuse bands of light that stretch 80-640km into our atmosphere. The phenomenon typically occurs when molecules (mostly nitrogen and oxygen) are energized by ultraviolet (UV) radiation from sunlight. To release that energy, atoms in the lower atmosphere bump into each other and lose energy in the collision. The result is colorful airglow.
Reference: Thomas Pesquet’s Tweet
See earthview photo gallery: LiVEARTH