A Witch by Starlight By starlight this eerie visage shines in the dark, a crooked profile evoking its popular name, the Witch Head Nebula. In fact, this entrancing telescopic portrait gives the impression the witch has fixed her gaze on Orion's bright supergiant star Rigel. Spanning over 50 light-years, the blue color of the Witch Head Nebula and of the dust surrounding ...
Red Aurora Over Australia Why would the sky glow red? Aurora. Two weeks ago solar storms, emanating mostly from active sunspot region 1402, showered particles on the Earth that excited oxygen atoms high in the Earth's atmosphere. As the excited element's electrons fell back to their ground state, they emitted a red glow. Were oxygen atoms lower in Earth's atmosphere ...
Una vista detallada del lugar del Apollo 17 Esta vista del lugar de aterrizaje del Apollo 17, en el valle de Taurus-Littrow, fue captada el mes pasado por la sonda Lunar Reconnaissance Orbiter (LRO) y es la más nítida jamás realizada desde el espacio. La imagen en alta resolución se registró durante un rato en que la órbita de la LRO había modificado para crear un acercamiento ...
MyCn18: La Nebulosa Reloj de Arena Las arenas del tiempo están expirando para la estrella central de esta nebulosa planetaria con forma de reloj de arena. Con su combustible nuclear agotado, esta breve y espectacular fase final en la vida de una estrella tipo Sol ocurre cuando sus capas externas son expulsadas – su núcleo se convierte en una fría y desvaneciente enana blanca. ...
Neptune: Once Around Neptune rotates once on its axis in about 16 hours. So, spaced about 4 hours apart these 4 images of the solar system's most distant gas giant cover one Neptune day. Recorded by the Hubble Space Telescope in late June they combine exposures made with visible and near-infrared filters to show high-altitude clouds composed of methane ice crystals against ...
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