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| DEEP SKYImages From Beyond, Words From Within |
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| 25377 file in 104 album e 5 categorie con 25244 commenti, visti 3156034 volte |
| Immagini a caso |
Io-050107_08.jpgVolcanic Lights In the Night of Io75 visiteThis unusual image shows Io glowing in the darkness of Jupiter's shadow. It is a combination of eight images taken by the New Horizons Long Range Reconnaissance Imager (LORRI) between 14:25 and 14:55 Universal Time on February 27, 2007, about 15 hours before the spacecraft's closest approach to Jupiter. North is at the top of the image.
Io's surface is invisible in the darkness, but the image reveals glowing hot lava, auroral displays in Io's tenuous atmosphere and volcanic plumes across the moon. The three bright points of light on the right side of Io are incandescent lava at active volcanoes - Pele and Reiden (south of the equator), and a previously unknown volcano near 22 degrees north, 233 degrees west near the edge of the disk at the 2 o'clock position.
An auroral glow, produced as intense radiation from Jupiter's magnetosphere bombards Io’s atmosphere, outlines the edge of the moon’s disk. The glow is patchy because the atmosphere itself is patchy, being denser over active volcanoes. In addition to the near-surface glow, there is a remarkable auroral glow suspended 330 kilometers (200 miles) above the edge of the disk at the 2 o'clock position; perhaps this glowing gas was ejected from the new volcano below it. Another glowing gas plume, above a fainter point of light, is visible just inside Io's disk near the 6 o'clock position; this plume is above another new volcanic eruption discovered by New Horizons.
On the left side of the disk, near Io's equator, a cluster of faint dots of light is centered near the point on Io that always faces Jupiter. This is the region where electrical currents connect Io to Jupiter's magnetosphere. It is likely that electrical connections to individual volcanoes are causing the glows seen here, though the details are mysterious.
Total exposure time for this image was 16 seconds. The range to Io was 2.8 million kilometers (1.7 million miles), and the image is centered at Io coordinates 7 degrees south, 306 degrees west. The image has been heavily processed to remove scattered light from Jupiter, but some artifacts remain, such as dark patches in the background.
MareKromium
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PSP_001367_1620_RED_abrowse.jpgGratteri Crater (Natural Colors; credits: Lunexit)63 visitenessun commentoMareKromium
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APOLLO_14_AS_14-77-10366a.JPGAS 14-77-10366 (a) - Thermal Degradation Sample62 visiteThermal Degradation Sample; taken in the vicinity of Station "A".MareKromium
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![vo1_038a02[1]-PCF-LXTT.jpg](albums/userpics/10060/small_vo1_038a02%5B1%5D-PCF-LXTT.jpg "Nome del file=vo1_038a02[1]-PCF-LXTT.jpg
Dimensione del file=109KiB
Dimensioni=980x1072
Aggiunta il=Giu 13, 2011")
vo1_038a02[1]-PCF-LXTT.jpgFrame Viking Orbiter 1 n. 038a02 (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)153 visitenessun commentoMareKromium
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Venusian_Atmosphere-Airglow_VIRTIS_Anticlockwise-01.jpgThe "Airglow" of Venus64 visiteOne year has passed since 11 April 2006, when Venus Express, Europe’s first mission to Venus and the only spacecraft now in orbit around the planet, reached its destination. Since then, this advanced probe, born to explore one of the most mysterious planetary bodies in the Solar System, has been revealing planetary details never caught before.
Intensively visited by several Russian and American probes from the 60s to the early 90s, Venus has always represented a puzzling target for scientists worldwide to observe. Venus Express, designed and built in record time by ESA, was conceived with the purpose of studying Venus - unvisited since 1994 - in the most comprehensive and systematic way ever, to provide a long-due tribute to a planet so interesting, yet cryptic.
Using state-of-the-art instrumentation, Venus Express is approaching the study of Venus on a global scale. The space probe is collecting information about Venus’ noxious and restless atmosphere (including its clouds and high-speed winds, as seen from this video obtained with the VMC camera on board) and its interaction with the solar wind and the interplanetary environment. Last but not least, it is looking for signs of surface activity, such as active volcanism. MareKromium
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OPP-SOL446-1P167767420EDN55B0P2619L234567M1.jpgMartian Sky - Sol 446 (possible Natural Colors; credits: Lyle.org)121 visitenessun commentoMareKromium
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SOL817-2P198895408EFFAR00P2281L7M1.jpgMore fresh cracks on the surface - Sol 81775 visiteCerchiatura Gialla: un'altra - freschissima - crepa nel suolo e, in alto a Dx, ancora la roccia anomala che abbiamo assimilato ad un "cappello con visiera".
Anche in questo frame, l'ombra proiettata dalla "visiera" si spezza e, anche se non si può escludere che questo effetto sia determinato da una irregolarità del suolo (la definizione del frame è cattiva e quindi non si può essere troppo precisi al riguardo), la nostra sensazione è sempre quella che si possa trattare di un vizio del frame dovuto ad un intervento manipolatorio di cattiva qualità.
Un complimento, ormai abituale, al Dr Barca per l'occhio e la pazienza avute nel trovare ed evidenziare queste Anomalìe di Superficie!
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SOL413-MF-LXTT.jpgWhat a Landscape! - Sol 413 (an Image-Mosaic in Natural Colors by Dr Marco Faccin - Lunexit Team)107 visitenessun commentoMareKromium
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| Ultimi arrivi |
Dyson_Swarm_-_03.jpgThe Dyson Sphere68 visiteHow It Works: each satellite in the Swarm absorbs or reflects the star’s sunlight and beams it to where it is needed—such as to an inhabited planet or orbital space stations.
Uses: the captured energy could power an entire civilization, propel massive spaceships using photon sails, or run planetary-scale supercomputers and artificial intelligence networks.
Materials: constructing a comprehensive Swarm requires a staggering amount of raw materials. Theorists suggest that disassembling an entire rocky planet, like Mercury, could provide enough mass to build the initial stages of a Swarm.
Gradual Build: our Civilization wouldn't build a full Swarm all at once. We would likely start with a "proto-swarm" consisting of space-based solar arrays, expanding it over thousands of years.MareKromiumGiu 01, 2026
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Dyson_Swarm_-_01.jpgThe Dyson Swarm76 visiteSome have suggested that Dyson Sphere habitats could be built around white dwarfs or pulsars.
In 2022 it was suggested that a Dyson Swarm around the Sun could be launched from either Mercury or Mars.
In order to transmit the energy back (Microwaves and high frequency IR Radiations maybe?), far-field radiative wireless power transfer was proposed, a technology that is not yet fully developed. But the question remains open...
A Dyson swarm is a hypothetical megastructure that orbits a star to capture its radiant energy. Proposed as an alternative to the solid, unbuildable "Dyson Sphere," it consists of a vast cloud of independent satellites or habitats that harness massive amounts of stellar power.
The Inspiration: Physicist Freeman Dyson first proposed the concept in 1960. He theorized that highly advanced alien civilizations would require exponentially more energy than a single planet could provide, prompting them to build structures around their host star.
Dyson Sphere vs. Dyson Swarm: Dyson Sphere vs. Dyson Swarm: While a traditional "Dyson sphere" is often imagined in sci-fi as a single, solid shell around a star, this is mechanically impossible due to immense gravitational stresses. A swarm solves this by using millions or billions of independent solar collectors, mirrors, and space habitats traveling in their own individual orbits. MareKromiumGiu 01, 2026
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Dyson_Swarm_-_04.jpegThe Dyson Swarm76 visiteBecause these megastructures absorb so much starlight, they would emit a unique infrared signature (waste heat). Astronomers look for these anomalies when searching for highly advanced, Extraterrestrial Civilizations (so-called "Technosignatures").MareKromiumGiu 01, 2026
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Dyson_Sphere_-_07.jpegThe Dyson Sphere85 visiteAlthough Dyson Spheres in the form of a swarm are theoretically possible, building a stable megastructure around the Sun is currently far beyond humanity's engineering capacity. The number of craft required to obtain, transmit, and maintain a complete Dyson sphere exceeds present-day industrial capabilities.
Dyson Spheres have prompted speculation into the feasibility of a class of proposed stellar engines, hypothetical megastructures whose purpose is to extract useful energy from a star, sometimes for specific purposes.
For example, Matrioshka brains have been proposed to use energy extracted by Dyson Spheres for computation, while Shkadov thrusters would extract energy for propulsion. Some proposed stellar engine designs are based on the Dyson Sphere. Futurist George Dvorsky has advocated the use of self-replicating robots to overcome the limitation of humanity's engineering capacity in the relatively near term.MareKromiumGiu 01, 2026
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Dyson_Sphere_-_06.jpegThe Dyson Sphere74 visiteOn October 14, 2015, Planet Hunters' citizen scientists discovered unusual light fluctuations of the star KIC 8462852 raising press speculation that a Dyson sphere may have been discovered. However, subsequent analysis showed that the results were consistent with the presence of dust.
In 2024 there was press speculation that potential signs of interstellar Dyson spheres had been discovered.
The seven objects of interest – all located within a thousand light-years of Earth – were M-dwarfs, a class of stars that are smaller and less luminous than the Sun. However, the authors of the findings were careful not to make any overblown claims. Despite this, many media outlets picked up on the story.
Less fantastical explanations included a suggestion that the detected infrared was caused by distant dust-obscured galaxies.MareKromiumGiu 01, 2026
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Dyson_Sphere_-_03.jpgThe Dyson Sphere (here: Complex and interconnected Dyson Swarm)68 visiteDyson-style energy collectors around a distant star would absorb and re-radiate energy from the star. The wavelengths of such re-radiated energy may be atypical for the star's spectral type, due to the presence of heavy elements not naturally occurring within the star.
If the percentage of such atypical wavelengths were to be significant, an alien megastructure could be detected at interstellar distances. This could indicate the presence of what has been called a Type II Kardashev civilization.
SETI has looked for such infrared-heavy spectra from solar analogs, as has Fermilab. Fermilab discovered 17 potential "ambiguous" candidates, of which four were in 2006 called "amusing but still questionable". Later searches also resulted in several candidates, all of which remain unconfirmed.MareKromiumGiu 01, 2026
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Dyson_Sphere_-_02.jpgThe Dyson Sphere93 visiteSince Dyson's paper, many variant designs involving an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction, often under the name "Dyson sphere". Fictional depictions often describe a solid shell of matter enclosing a star – an arrangement Dyson himself considered impossible. The sphere he imagined consisted of a loose collection or swarm of objects traveling on independent orbits around the star, an arrangement that has become known as a Dyson Swarm.MareKromiumGiu 01, 2026
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Dyson_Sphere_-_01.jpgThe Dyson Sphere (here: Dyson Revolving Rings)71 visiteDyson speculated that such structures would be the logical consequence of the escalating energy needs of a technological civilization and would be a necessity for its long-term survival. A signature of such spheres detected in astronomical searches would be an indicator of extraterrestrial intelligence.MareKromiumGiu 01, 2026
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