Brotherhood of moons
Digital work
Jupiter, Europa, Io and Callisto seen from the icy surface of Ganymede.
Hermandad de lunas. Obra digital.
Júpiter, Europa, Io y Calisto vistos desde la helada superficie de Ganimedes.
Showing posts with label Io. Show all posts
Showing posts with label Io. Show all posts
A serene night on Europa
Digital work
The Sun is situated below the horizon and the only sources of light that illuminate the smooth and white surface of Europa at this time are Jupiter and Io. The light appears to be somewhat bluish to the human eye, as it happens here on Earth with the moonlight, due to the Purkinje effect: When the luminance level is reduced, our vision changes progressively from photopic (cone cells, full color) to mesopic and finally scotopic (rod cells, black and white) and the last colors we perceive are those of short wavelength. The surface of Europa is very reflective. It has an albedo of 0.64, one of the highest in the Solar System.
Una noche serena en Europa. Obra digital.
El Sol está situado por debajo del horizonte y las únicas fuentes de luz que iluminan ahora la suave y blanca superficie de Europa son Júpiter e Io. La tenue luz del paisaje aparenta ser un tanto azulada al ojo humano, tal y como sucede aquí en la Tierra con la luz de la Luna. Es debido al efecto Purkinje: Cuando el nivel de luminancia disminuye nuestro modo de visión pasa progresivamente de fotópico (visión a todo color por conos) a mesópico y finalmente escotópico (visión por bastoncillos en blanco y negro). Los últimos colores que percibimos son los de longitud de onda corta.
La superficie de Europa es muy reflectante. Tiene un albedo de 0.64, uno de los más altos del Sistema Solar.
Tvashtar erupting, Io
Digital work
Digital work
The Galileo spacecraft was able to study huge eruptions on Tvashtar Paterae: A 25-kilometer long (16 mi), 1 to 2-kilometer high (0.62 to 1.24 mi) curtain of lava was seen, followed by a plume of gas rising 385 kilometers (239 mi) above the surface of Io. On February 2007 the New Horizons probe, on its way to Pluto, captured an enormous eruption with a 330-kilometer high (210 mi) plume.
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