FuturaSciences
Nombre total de pages vues
27/03/2026
Santé/Medecine - AVANCEES MAJEURES ET ESPOIR - CANCER DU SEIN METASTIQUE (1/2)
FuturaSciences
25/03/2026
Astronomy - THE GUARDIANS OF RAPA NUI BENEATH THE MILKY WAY
2026 March 25
Image Credit and Copyright: Rositsa Dimitrova
Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)
Explanation: In the words of today's astrophotographer, Rositsa Dimitrova, "What have these silent sentinels watched pass across the sky?" The volcanic mo'ai (meaning statue) of Ahu Tongariki stand guard over Rapa Nui (Isla de Pascua, Easter Island), a Polynesian island (annexed by Chile in 1888) located thousands of kilometers off the coast of South America in the Pacific Ocean. Due to the island's remoteness, the mo'ai, with their backs to the dark ocean, are able to gaze upon a clear and vibrant night sky. Pictured, these larger-than-life statues stare at the bright band of the Milky Way, partly obscured by interstellar dust and blurred by Earth's clouds. Under such clear night skies, the Rapa Nui created observatories and used astronomical observations for navigation, calendar calibration, celebrations, and more. Images like this one remind us of the importance of dark skies, protecting the land underneath them, and preserving the culture that they inspire.
24/03/2026
Astronomy - A GRAVITY MAP OF EARTH
2026 March 24
A Gravity Map of Earth
Explanation: Is gravity the same over the surface of the Earth? No -- in some places you will feel slightly heavier than others. The featured Earth map video shows in colors and exaggerated highs and lows where the gravitational field of Earth is relatively strong and weak. A low spot, where you would feel slightly lighter, can be seen just off the coast of India, in blue, while a relative high occurs in the mountains of Chile in South America. The cause of these irregularities does not always follow present surface features. Scientists hypothesize that other important factors lie in deep underground structures in Earth's mantle and may be related to the Earth's appearance in the distant past. The featured map was composed from data taken by NASA's twin GRACE satellites that orbited the Earth from 2002 to 2017. GRACE mapped Earth's gravity by carefully tracking tiny changes in the distance between the two satellites.
23/03/2026
Microphotographie - DES GLOBULES BLANCS GENETIQUEMENT MODIFIES
Astronomy - LIGHT PILLARS AND ORION OVER MOHE
Image Credit & Copyright: Jeff Dai (TWAN)
Explanation: What's happening at the end of that street? Pictured here are not auroras but light pillars, a phenomenon typically much closer. In most places on Earth, a lucky viewer can see a Sun pillar, a column of light appearing to extend up from the Sun caused by flat fluttering ice-crystals reflecting sunlight from the upper atmosphere. Usually, these ice crystals evaporate before reaching the ground. During freezing temperatures, however, flat fluttering ice crystals may form near the ground and are sometimes known as a crystal fog. These small ice crystals may then reflect not the Sun but ground lights. The featured image captured not only numerous light pillars but also the iconic constellation of Orion, and was taken in Mohe, the northernmost city in China.
22/03/2026
Microphotographie - CHANGER SON REGARD SUR LE PAIN MOISI
Astronomy - LEAVING EARTH
2026 March 22
Video Credit: NASA, JHU Applied Physics Lab, Carnegie Inst. Washington, MESSENGER
Explanation: What would it look like to leave planet Earth? Such an event was recorded visually in great detail by the MESSENGER spacecraft as it swung back past the Earth in 2005 on its way in toward the planet Mercury. Earth can be seen rotating in this time-lapse video, as it recedes into the distance. The sunlit half of Earth is so bright that background stars are not visible. The robotic MESSENGER spacecraft orbit around Mercury from 2011 to 2015 has conducted the first complete map of the surface. On occasion, MESSENGER peered back at its home world. MESSENGER is one of the few things created on the Earth that will never return. At the end of its mission, MESSENGER was purposefully crashed into Mercury's surface.
21/03/2026
Astronomy - GALAXIES IN THE RIVER : NGC 1300 AND NGC 1297
2026 March 21
Image Credit & Copyright: Dietmar Hager and Eric Benson
Explanation: Spiral NGC 1300 and elliptical NGC 1297 are galaxies that lie on the banks of the southern constellation Eridanus (The River). At 70 million light-years distant or more, both are members of the Eridanus Galaxy Cluster. About 100,000 light-years across, at lower left in this sharp, galaxy group photo NGC 1300 is seen face-on with a prominent central bar and grand, sweeping spiral arms. Like other spiral galaxies, including our own barred spiral Milky Way Galaxy, NGC 1300 is thought to have a supermassive central black hole. A contrast in appearance and slightly more distant, NGC 1297 is the roughly spherical large elliptical galaxy near the top of the frame. With little active star formation, elliptical galaxies are composed of older populations of stars and are likely he result of multiple collisions and mergers with spirals.
20/03/2026
Astronomy - SPRING EQUINOX AT TEIDE OBSERVATORY
2026 March 20
Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN)
Explanation: The defining astronomical moment of the equinox today is at 14:46 UTC (March 20). That's when the Sun crosses the celestial equator moving north in its yearly journey through planet Earth's sky, marking the beginning of spring for our fair planet in the northern hemisphere and fall in the southern hemisphere. Then, day and night are nearly equal around the globe. In fact, both day and nighttime exposures from a spring equinox at the Observatorio del Teide in Tenerife, Canary Islands, Spain, are used in this composited skyscape. Over 1,000 images were taken with a fisheye lens and merged in the ambitious equinox project. The apparent motion of the Sun setting along the celestial equator on the equinox date follows the bright linear, diagonal track from the sequence of daytime exposures taken over 6 hours. After sunset, nighttime exposures recorded startrails, with the celestial equator as a linear track and concentric arcs circling the north celestial pole near Polaris at upper right and the south celestial pole beyond the lower left edge (and below the Teide horizon). The foreground includes the distant Teide volcano peak and the observatory's pyramid-shaped solar laboratory building.
19/03/2026
Astronomy - LAUNCH PLUME : SPACEX JELLY FISH
2026 March 19
Image Credit & Copyright: Michael Seeley
Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)
Explanation: Even if you live with your head in the clouds, you won’t find a jellyfish like this one very often. The featured image shows a SpaceX Falcon 9 rocket launch from Cape Canaveral in Florida on March 4. The launch happened 52 minutes before sunrise, and the second stage rocket exhaust plume was high enough in the sky to catch the light of the rising sun, while the photographer was still in the dark. This combination of light and shadow, possible at dawn or dusk, makes the exhaust, mostly water vapor and carbon dioxide, appear as a glowing cloud. It only looks like it's going down, as the rocket follows the curvature of the Earth on its way to space. A related effect is the twilight phenomenon, which causes colorful contrails sometimes mistaken for UFOs. But, in case you are wondering: real jellyfish were sent to space by NASA in the 1990s as part of a science experiment.
Astronomy - HICKSON 44 IN LEO
2026 March 27 Hickson 44 in Leo Image Credit & Copyright : Peter Kennett Explanation: Scanning the skies for galaxies, Canadian astr...
-
2025 May 11 The Surface of Venus from Venera 14 Image Credit: Soviet Planetary Exploration Program , Venera 14 ; Processing & Copyri...
-
2025 April 14 The Galactic Center in Radio from MeerKAT Image Credit: NASA , ESA , CSA , STScI , SARAO , S. Crowe ( UVA ), J. Bally ...




