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Cloud droplets tend to scatter light efficiently, so that the intensity of the solar radiation decreases with depth into the gases. As a result, the cloud base can vary from a very light to very dark grey depending on the cloud's thickness and how much light is being reflected or transmitted back to the observer.
One of the oldest stars yet identified - oldest but not most distant in this case - was identified in 2014: while "only" 6,000 light years away, the star SMSS J031300.36−670839.3 was determined to be 13.8 billion years old, or more or less the same age as the universe itself. [9] The starlight shining on Earth includes this star. [9]
From the polarization patterns, these species can orient themselves by determining the exact position of the Sun without the use of direct sunlight. Thus under cloudy skies, or even at night, animals can find their way. Using polarized light as a compass however is no easy task. The animal must be capable of detecting and analyzing polarized light.
A solar eclipse happens when the moon passes between the sun and Earth, either fully or partially blocking the sun's light and casting a temporary shadow on Earth, according to NASA.
Here's the possibility of seeing the northern lights. ... Coronal mass ejection vs. solar flare: 1 gives us the aurora borealis. Show comments. Advertisement. Advertisement.
Cloudy night sky without moon [4] 400 μcd/m 2 "Darkest sky" [5] 1 mcd/m 2: Night sky [6] 1.4 mcd/m 2: Typical photographic scene lit by full moon [7] 10 −2: 5 mcd/m 2: Approximate scotopic/mesopic threshold [8] 10 −1: 10 0: cd/m 2: 2 cd/m 2: Floodlit buildings, monuments, and fountains [9] 10 1: 5 cd/m 2: Approximate mesopic/photopic ...
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