Showing results for "Invisible" in Astronomy & Space Science

On a moonless night in January 1991, a dozen US aircraft appeared in the skies over Baghdad. To the Iraqi air defenses, the planes seemed to come from nowhere. Each aircraft was more than 60 feet in length and with a wingspan of 40 feet, yet its radar footprint was the size of a ball bearing. Here was the first extensive combat application of Stealth technology. And it was devastating.

Imagine you’re trying to build the biggest, most awesome LEGO castle ever. You gather all your colorful bricks—the reds, blues, yellows, and greens. You plan your design, start stacking the bricks, and build towers, walls, gates, and secret tunnels. Everything’s going great. But suddenly, something odd starts to happen. Parts of your castle stick together more tightly than they should. Some towers refuse to fall over, no matter how much you poke them. And even stranger, the whole play area you’re building on starts stretching.

Mondphasen, Sternbilder oder Planetentreffen – das Himmelsjahr hält so einiges für uns bereit. Doch die spektakulärsten Himmelsphänomene sind die, die wir nicht sehen können. Zum Beispiel die etwa 40 Milliarden potenziell bewohnbaren Exoplaneten in unserer Milchstraße oder die mysteriöse Dunkle Materie, aus der der Großteil unseres Universums zu bestehen scheint. Die Astronomin Ruth Grützbauch, Mitglied der Science Busters, hat einen vollkommen anderen Führer durch das Himmelsjahr geschrieben

Teletransporte, máquinas del tiempo, campos de fuerza y naves intergalácticas: ¿materia de ciencia ficción o tecnologías potencialmente disponibles en el futuro? Inspirado por los mundos fantásticos de H.G. Wells, Star Trek o La guerra de las galaxias, el prestigioso físico teórico y divulgador Michio Kaku lanza una mirada inteligente, seria y a menudo sorprendente a lo que nuestra actual comprensión de las leyes del universo nos permite vislumbrar en el futuro.