{"product_id":"vision-of-a-stellar-ending-nasa","title":"Visión de un final estelar Lienzo","description":"\u003cp\u003e Hace más de 11.000 años, una estrella supergigante masiva llegó al final de su vida. El núcleo de la estrella colapsó para formar una bola de neutrones increíblemente densa, y su exterior fue destruido en una inmensa liberación de energía que los astrónomos llaman supernova.\u003c\/p\u003e\n\n\u003cp\u003eLa luz de esta supernova llegó por primera vez a la Tierra desde la dirección de la constelación de Casiopea alrededor de 1667 dC Si alguien vivo en ese momento la vio, no dejó registros. Es probable que grandes cantidades de polvo entre la estrella moribunda y la Tierra atenuaran el brillo de la explosión hasta el punto de que apenas fuera visible a simple vista, si es que lo era.\u003c\/p\u003e\n\n \u003cp\u003eEl remanente de esta supernova fue descubierto en 1947 a partir de su poderosa emisión de radio. Catalogada como Cassiopeia A, es una de las fuentes de radio más brillantes de todo el cielo. Más recientemente, el Wide-field Infrared Survey Explorer (WISE) detectó ecos infrarrojos del destello de luz que se propagaba desde la supernova.\u003c\/p\u003e\n\n\u003cp\u003eEn la imagen, la brillante nube central de polvo es la onda expansiva que se mueve a través del espacio interestelar calentando el polvo a medida que avanza. La onda expansiva viaja rápido, aproximadamente al 6% de la velocidad de la luz. Cuando WISE tomó esta imagen, la onda expansiva se había expandido a una distancia de aproximadamente 21 años luz de la explosión original. El destello de luz de la explosión, que viaja a la velocidad de la luz, ha recorrido más de 300 años luz. Los ecos de color naranja más alejados del remanente central provienen del polvo interestelar que fue calentado por el destello de la supernova siglos después de la explosión original.\u003c\/p\u003e\n\n \u003cp\u003eLos colores falsos de esta imagen representan diferentes longitudes de onda de la luz infrarroja, que es invisible para el ojo humano.\u003c\/p\u003e\n\n\u003cp\u003eCrédito de la imagen: NASA\/JPL-Caltech\/UCLA\u003c\/p\u003e","brand":"Sign Of The Times : NASA","offers":[{"title":"Canvas \/ Classic \/ 18 x 12","offer_id":53436820717932,"sku":"C3000A000166583","price":710.0,"currency_code":"MXN","in_stock":true},{"title":"Canvas \/ Classic \/ 24 x 16","offer_id":53436820750700,"sku":"C3100A000166583","price":965.0,"currency_code":"MXN","in_stock":true},{"title":"Canvas \/ Classic \/ 30 x 20","offer_id":53436820783468,"sku":"C3200A000166583","price":1772.0,"currency_code":"MXN","in_stock":true},{"title":"Canvas \/ Classic \/ 36 x 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