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The Picture Thread
- Thread starter vtac
- Start date
CrazyDiamond
HAL is a StarChild
Starting with a somewhat depressive item...luckily there are still many places you can go and see an unaltered night sky.
This world map shows the effect of artificial night sky brightness on the visual appearance of the night sky. The brightness was modeled using high resolution satellite data and fit to thousands of night sky brightness measurements in recent work. Color-coded levels are compared to the natural sky brightness level for your location. For example, artificial sky brightness levels in yellow alter the natural appearance of the night sky. In red they hide the Milky Way in an artificial luminous fog. The results indicate that the historically common appearance of our galaxy at night is now lost for more than one-third of humanity. That includes 60% of Europeans and almost 80% of North Americans, along with inhabitants of other densely populated, light-polluted regions of planet Earth.
Anticrepuscular rays over Westminster, Colorado.
Montecassiano, Italy
. The Moon, Jupiter and the four Galilean moons and some passing clouds.
El Leoncito National Park, Argentina and the dome of the Jorge Sahade telescope on the hill on the far right.
Perseid meteors over Mount Shasta, California.
Perseid, aurora, and noctilucent clouds, northern Sweden.
Jet Lightning near the peak of Shikengkong mountain in China.
And end with a beauty...Milky Way above the Namib Desert, Namibia, Africa.
This world map shows the effect of artificial night sky brightness on the visual appearance of the night sky. The brightness was modeled using high resolution satellite data and fit to thousands of night sky brightness measurements in recent work. Color-coded levels are compared to the natural sky brightness level for your location. For example, artificial sky brightness levels in yellow alter the natural appearance of the night sky. In red they hide the Milky Way in an artificial luminous fog. The results indicate that the historically common appearance of our galaxy at night is now lost for more than one-third of humanity. That includes 60% of Europeans and almost 80% of North Americans, along with inhabitants of other densely populated, light-polluted regions of planet Earth.
Anticrepuscular rays over Westminster, Colorado.
Montecassiano, Italy
. The Moon, Jupiter and the four Galilean moons and some passing clouds.
El Leoncito National Park, Argentina and the dome of the Jorge Sahade telescope on the hill on the far right.
Perseid meteors over Mount Shasta, California.
Perseid, aurora, and noctilucent clouds, northern Sweden.
Jet Lightning near the peak of Shikengkong mountain in China.
And end with a beauty...Milky Way above the Namib Desert, Namibia, Africa.
