|
|
Outpost1.JPGThe Outpost N. 1 (by Roberto Tremolada)54 visitenessun commentoMareKromium
|
|
Outpost2.JPGThe Outpost N. 2 (by Roberto Tremolada)55 visitenessun commentoMareKromium
|
|
Over Clouds.jpgOver-Clouds319 visite"...Animus hominis quidquid sibi imperat, obtinet..."
(P. Siro)
|
|
Over Titan_s Clouds.jpgOver-clouds67 visitenessun commento
|
|
PIA09956.jpgCosmic "Merger"55 visiteThis artist's concept shows what the night sky might look like from a hypothetical planet around a star tossed out of an ongoing four-way collision between big galaxies (yellow blobs). NASA's SST spotted this "quadruple merger" of galaxies within a larger cluster of galaxies located nearly 5 BLY away.
Though the galaxies appear intact, gravitational disturbances have caused them to stretch and twist, flinging billions of stars into space -- nearly three times as many stars as are in our Milky Way galaxy. The tossed stars are visible in the large plume emanating from the central, largest galaxy. If any of these stars have planets, their night skies would be filled with the monstrous merger, along with other galaxies in the cluster (smaller, bluish blobs).
This cosmic smash-up is the largest known merger between galaxies of a similar size. While three of the galaxies are about the size of our Milky Way galaxy, the fourth (center of image) is three times as big.
All four of the galaxies, as well as most other galaxies in the huge cluster, are blob-shaped ellipticals instead of spirals like the Milky Way.
Ultimately, in about one hundred million years or so, the four galaxies will unite into one. About half of the stars kicked out during the merger will fall back and join the new galaxy, making it one of the biggest galaxies in the universe.MareKromium
|
|
PangeaUltima_scotese_big.jpgA VERY far, distant and yet possible Future: Pangea Ultima55 visiteIs this what will become of the Earth's surface? The surface of the Earth is broken up into several large plates that are slowly shifting.
About 250 MY ago, the plates on which the present-day continents rest were positioned quite differently, so that all the landmasses were clustered together in one supercontinent now dubbed Pangea. About 250 MY from now, the plates are again projected to reposition themselves so that a single landmass dominates.
The above simulation from the PALEAOMAP Project shows this giant landmass: Pangea Ultima.
At that time, the Atlantic Ocean will be just a distant memory, and whatever beings inhabit Earth will be able to walk from North America to Africa.MareKromium
|
|
Partial_Lunar_Eclipse.jpgEarth's Shadow55 visitenessun commentoMareKromium
|
|
Peace.jpgPeaceful Kingdom... (by Roberto Tremolada)58 visitenessun commentoMareKromium
|
|
|
|
Perseid-1.jpgShooting Star (1)63 visiteL'immagine è sicuramente bella, ma quello che vorremmo farVi notare è la tessitura della striscia lasciata dalla "stella cadente" la quale, come ben si vede (anche senza operare ingrandimenti), contiene "nodi" (modesti rigonfiamenti dovuti, probabilmente, a perdita/consunzione di materiale a seguito dell'attrito durante la caduta del frammento di Corpo Celeste attraverso l'atmosfera) e "brillamenti" (delle vere e proprie "fiammate" che si avviano, di regola, in corrispondenza dei "nodi" e che indicano cambi di temperatura - ergo di luminosità - del Corpo in questione).
|
|
Perseid-2.jpgShooting Star (2) - detail mgnf62 visiteOsservate questo ingrandimento della Perseide immortalata dal nostro Amico Jimmy Westlake e poi provate a riguardare il (presunto) bolide che Cassini potrebbe aver fotografato nello Spazio di Saturno: noterete con semplicità che le caratteristiche delle due "strisciate di luce" (streaks) sono MOLTO simili.
Peccato che la NASA si affanni a dare credito solo ad alcuni personaggi e ad alcune (sempre più discutibili o insulse) "scoperte" (come il presunto colorito "rosato" di Iperione), senza mai prendere atto che anche in Italia esistono Ricercatori attenti e competenti i quali, di tanto in tanto, sono i primi a notare l'esistenza di qualcosa di veramente raro...
Peccato.
|
|
Petals.jpgPetals on Mars (by Bruce Moyant)56 visitenessun commentoMareKromium
|
|
| 460 immagini su 39 pagina(e) |
 |
|
|
|
|
21 | |
|
|
|
|
