9 - SCIENCE - JoanMira
La Science sous toutes ses formes/Science in all its forms
Nombre total de pages vues
24/06/2026
La vie et la mort - Y-A-T-IL UNE VIE APRèS LA MORT ? (4/5)
22/06/2026
Astronomy - M27 : THE DUMBBELL NEBULA
2026 June 22
Image Credit & Copyright: Francesco Antonucci
Explanation: Is this what will become of our Sun? Quite possibly. The first hint of our Sun's future was discovered inadvertently in 1764. At that time, Charles Messier was compiling a list of diffuse objects not to be confused with comets. The 27th object on Messier's list, now known as M27 or the Dumbbell Nebula, is a planetary nebula, one of the brightest planetary nebulas on the sky and visible with binoculars toward the constellation of the Fox (Vulpecula). It takes light about 1000 years to reach us from M27, featured here in colors enhanced by red for hydrogen and blue for oxygen. We now know that in about 6 billion years, our Sun will shed its outer gases into a planetary nebula like M27, while its remaining center will become an X-ray hot white dwarf star. Understanding the physics and significance of M27 was well beyond 18th century science, though. Even today, many things remain mysterious about planetary nebulas, including how their intricate shapes are created.
21/06/2026
Astronomy - DAYTIME MOON MEETS EVENING STAR
2026 June 20
Image Credit & Copyright: Debra Ceravolo
Explanation: Venus is now appearing on the celestial stage as Earth's brilliant evening star, performing with the Moon, other wandering planets, and bright stars in western skies. For evening sky gazers on June 17, the celestial beacon rose after sunset close by a young, slender, crescent Moon. But from some locations the Moon could be seen to occult or pass in front of Venus. And from a backyard observatory in southern British Columbia, Canada, the lunar occultation was played out in daylight. This stunning telescopic snapshot captured a scene in dramatically cloudy skies, following Venus' hour long disappearance, as the evening star emerged beyond the bright lunar limb.
17/06/2026
La vie et la mort - Y-A-T-IL UNE VIE APRèS LA MORT ? (3/5)
15/06/2026
Astronomy - TRIPLE SHOCKWAVE FROM SUN CROSSING ROCKET
2026 June 15
Image Credit & Copyright: John Winkopp (WAI Media)
Explanation: What's happening to this Sun-crossing rocket? The SpaceX Falcon 9 rocket, visible on the upper left, launched only about one minute before this amazing image was captured. As it rose to low Earth orbit from Cape Canaveral, Florida, USA, in late May, the rocket became supersonic before it crossed the disk of the distant Sun -- from the perspective of the well-placed photographer. The spacecraft's high speed caused bow-shaped compressed-air shockwaves to form across leading surfaces, with at least three visible even outside the Sun's disk because they refract sunlight. The trailing exhaust caused turbulence visible on the lower right. None of this was damaging to the robotic Starlink 10-53 mission, which delivered 29 communications satellites to low Earth orbit as planned. And if that isn't amazing enough - the Sun had spots!
14/06/2026
La vie et la mort - Y-A-T-IL UNE VIE APRES LA MORT ? (2/5)
13/06/2026
La vie et la mort - Y-A-T-IL UNE VIE APRES LA MORT ? (1/5)
Géoglyphes - LE CHIEN DE NAZCA
Astronomy - VENUS AND JUPITER: CONJUNCTION FROM AVEBURY
2026 June 12
Image Credit & Copyright: Josh Dury
Explanation: To see Venus and Jupiter together this month, you won't need binoculars or even a telescope. Just look up after sunset and you'll find them emerging as the sky grows dark near the western horizon. In fact, on June 9 the two brightest planets were in close conjunction, separated on the sky by less than 2 degrees from our perspective. Since (brighter) inner planet Venus orbits the Sun faster than outer planet Jupiter, it catches up with and passes the outer planet along the ecliptic roughly every 13 months. But every three years or so their resulting conjunction can be viewed far enough from the Sun to be easily seen in Earth's twilight skies. On June 9, the two celestial beacon's close "cosmic kiss" was captured here next to two large standing stones, the remains of a cove near the center of a 4,000 year old stone circle at Avebury, UK. Larger than Stonehenge, the Avebury henge and stone circle complex is also recognized as one of the most significant neolithic ceremonial sites on planet Earth.
La vie et la mort - Y-A-T-IL UNE VIE APRèS LA MORT ? (4/5)
Une remise en question scientifique Après sa guérison, Eben Alexander analyse son propre dossier médical. Il constate que, selon les connais...



