In light that is 100 million times dimmer than high noon, Megalopta genalis, tropical nocturnal sweat bees, leave their hollow-stick nests to forage for food.
"In modern society, most of the time we live in a controlled environment under artificial lights, which are 1,000 to 10,000 times dimmer than sunlight and the wrong part of the spectrum," Dr. Turner said.
The mini galaxies are a billion times dimmer than the Milky Way and were only found with the help of the most powerful digital camera in the world, which can see the faint glow of normal-sized galaxies as far away as eight billion light years from Earth.
It was a million times dimmer than the faintest stars visible with the naked eye.
In just 25 years, one particular ringlet moved 200 kilometers inward and became 10 times dimmer, reported Carolyn Porco of the Space Science Institute in Boulder, Colorado.
It can resolve items of magnitude 15, which is 4000 times dimmer than what can be seen with the naked eye, down to 24 microarcseconds.
For instance, they showed in 2004 that Megalopta genalis can find its way around at light intensities 20 times dimmer than starlight.
Also discovered by the Swiss team in April, Gliese 581d is farther away from its star than 581c is--about the same distance as Mercury is from the sun--although its star is 100 times dimmer.
With a visual magnitude of 15.17, it is around 10,000 times dimmer than the faintest stars visible to the naked eye and is 36000 light years distant.
To the observatory's disappointment and surprise, Pluto showed no visible disc; it appeared as a point, no different from a star, and, at only 15th magnitude, was six times dimmer than Lowell had predicted, which meant it was either very small, or very dark.
Time and trial will dim the light you have received unless you daily add to it.
