| Piú viste |
as17-147-22554.JPGAS 17-147-22554 - LM and Sun glare58 visiteGeophone 3 pan. LM.MareKromium
|
|
The_Sun.jpgNever too close, never too far...58 visiteCaption NASA:"When is the Sun most distant from Earth? It happened again just this past weekend.
A common misconception is that the Sun is most distant during the Winter, when it's the coldest. In truth, however, the seasonal temperatures are more greatly influenced by the number of daylight hours and how high the Sun rises.
For example, during Northern Winter, the tilt of the Earth causes the Sun to be above the horizon for a shorter time and remain lower in the sky than in Northern Summer. The picture compares the relative size of the Sun during Earth's closest approach in January (Northern Winter) on the left, and in July (Northern Summer) on the right. The angular size of the Sun is noticeably smaller during July, when it is farther away. If the Earth's orbit was perfectly circular, the Sun would always appear to be the same size.
These two solar images were taken from Spain during 2006, but the same effect can be seen in any year from any Earth-bound location".MareKromium
|
|
NGC-4449~0.jpgNGC 4449 - Dwarf Irregular Galaxy58 visite"...Populo, qui stultus honores
Saepe dat indignis et fame servit ineptus,
Qui stupet in titulis et imaginibus..."
(Orazio)
"...Il popol stesso
Il qual pur sai che spesse volte insano
Dà gli onori agli indegni, ed alla fama
Inetto serve, e ai titoli, ai ritratti,
Goffo stupisce..."
(Vincenzo Monti)MareKromium
|
|
North_Polar_Features-PIA08694-01.jpgNorth Polar Landscape (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visitenessun commentoMareKromium
|
|
OPP-SOL1232-1N237560276EFF85W0P1993L0M1.jpgClearing Skies over Meridiani... (2) - Sol 123258 visitenessun commentoMareKromium
|
|
HD_189733b-PIA09715_01.jpgExoplanet HD 189733b58 visiteCaption NASA:"This plot of data from NASA's Spitzer Space Telescope (SST) tells astronomers that a toasty gas exoplanet, or a planet beyond our Solar System, contains water vapor.
Spitzer observed the Planet, called HD 189733b, cross in front of its star at three different infrared wavelengths: 3,6; 4,5 and 8 microns (see lime-colored dots). For each wavelength, the Planet's Atmosphere absorbed different amounts of the starlight that passed through it. The pattern by which this absorption varies with wavelength matches known signatures of water, as shown by the theoretical model in blue".MareKromium
|
|
SOL1254-2N237599908EFFAUCMP1936R0M1.jpgFoggy days over Gusev Crater... - Sol 125458 visitenessun commentoMareKromium
|
|
NGC-6384.jpgNGC 6384 - Spiral Galaxy58 visite"...Multa cadunt inter calicem supremaque labra..."
(Gellio)
"...Molti eventi accadono nel (pur breve) tempo che occorre per portare una coppa alle labbra..."MareKromium
|
|
SOL1255-2P237774685EFFAUCMP2380L6M1.jpgStill foggy days over Gusev... (1) - Sol 125558 visitenessun commentoMareKromium
|
|
The_Rings-PIA08988.jpgBright Region in the C-Ring58 visiteCaption NASA:"This bright, isolated plateau in the middle of the C-Ring displays interesting internal variations in brightness. The plateau is not high in terms of elevation, but rather in terms of its particle density (seen here as brightness), which is several times higher than the surrounding Ring Structure.
Ring scientists are working to understand what produces the sharp boundaries of the plateau features, as well as the nature of the internal variations in brightness.
This view looks toward the sunlit side of the Rings from about 18° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 12, 2007 at a distance of approx. 230.000 Km (about 143.000 miles) from Saturn. Image scale is roughly 1 Km (3353 feet) per pixel".MareKromium
|
|
as17-153-23589.jpgAS 17-153-23589 - Wallace Crater58 visiteImage Collection: 70mm Hasselblad
Mission: 17
Magazine: 153
Magazine Letter: MM
Revolution: 39
Latitude: 20,4° North
Longitude: 8,3° West
Lens Focal Length: 80 mm
Camera Altitude: 103 Km
Sun Elevation (on Local Horizon): 1°
Mission Activity: REV 39
Film Type: SO-368
Film Width: 70 mm
Film Color: colorMareKromium
|
|
OPP-SOL1235-PIA-00936.jpgSeries of Storms Shrouds Mars in Dust (1) - NASA/JPL/Malin Space Science Systems58 visiteSince late June 2007, Mars has been having a series of regional dust storms. The dust raised by these individual storms has obscured most of the planet over the past few weeks. The two maps shown here are mosaics of images acquired by the Mars Reconnaissance Orbiter (MRO) Mars Color Imager (MARCI) on two days separated by about 3 and a half weeks. The first, on 22 June, shows that there was a dust storm occurring near the east end of the Valles Marineris trough system (left of the label for "Opportunity" in the map). This was the first in the series of storms. The second mosaic shows how Mars appeared on 17 July, after dust was lofted high into the atmosphere by several regional storms and countless smaller, local dust storms.
Each map was constructed from 13 pole-to-pole image swaths at red, green, and blue wavelengths acquired by the MRO MARCI. The maps are simple cylindrical projections, with north at the top and south at the bottom. Each image swath was acquired at about 3 p.m. local time on Mars over the course of 13 orbits. The black gaps occur in the MARCI data at places where the MRO spacecraft was slewed east or west to point its instruments at a specific target of scientific interest. The north polar region is not shown because winter began on 4 July and the north polar region is in wintertime darkness. Key features labeled on the maps include the Tharsis Montes and Olympus Mons volcanoes, the Hellas impact basin, Noachis Terra, Sinus Meridiani, and the two Mars Exploration Rover (MER) landing sites, Opportunity and Spirit. The dust storms, and the planet-encircling dust veil they generated, has greatly reduced the amount of sunlight available to run the two solar-powered rovers.
MareKromium
|
|
| 25353 immagini su 2113 pagina(e) |
 |
|
|
|
|
1382 | |
|
|
|
|
