Qu'est-ce que la théorie du satellite Chevali...

Imaginez une dune de sable qui émet un son grave, continu, presque musical, comme un bourdonnement ou le vrombissement d’un moteur lointain. Ce phénomène, appelé « chant des dunes », est observé dans plusieurs régions du monde, notamment dans le Sahara ou dans le désert de Gobi. ...  Show more

Imaginez une plage où le sable, les galets… et des fragments de plastique fondus s’assemblent pour former une véritable roche. Ce n’est plus une hypothèse, mais une réalité observée notamment à Hawaï et sur certaines côtes britanniques. Les scientifiques ont même donné un nom à c ...  Show more

In 1957, the Soviet Union launched Sputnik 1. It was the first satellite in Earth's orbit.Or was it?For over a hundred years, an object has been seen, heard and photographed by people all around the world. This object became known as the Black Knight Satellite.The signals coming ...  Show more

In this episode of SpaceTime with Stuart Gary:
<ol><li>Blue Origin selected to build NASA's next lunar lander: NASA has chosen Blue Origin to develop the Blue Moon lander concept, which will transport crews and supplies between lunar orbit and the Moon's surface. This partn ...  Show more

Get ready to explore a 10 billion year old mystery! A closely bound duo of energetic quasars, the hallmark of a pair of merging galaxies, have been discovered when the Universe was only 3 billion years old. What secrets do these quasars hold and why have they lasted so long? Join ...  Show more

On this mission, SOFIA is setting out to study Titan, Saturn’s biggest moon, by flying into the faint shadow that it casts as it blocks the light from a faraway star. It’s a phenomenon called an occultation, and if the mission succeeds, it will reveal new details about Titan’s at ...  Show more