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2. Dusk - Wikipedia

   en.wikipedia.org/wiki/Dusk

   The time of dusk is the moment at the very end of astronomical twilight, just before the minimum brightness of the night sky sets in, or may be thought of as the darkest part of evening twilight. [4] However, technically, the three stages of dusk are as follows: At civil dusk, the center of the Sun's disc goes 6° below the horizon in the ...

3. Clear Sky Chart - Wikipedia

   en.wikipedia.org/wiki/Clear_Sky_Chart

   Clear Sky Charts (called clocks until February 29, 2008) are web graphics which deliver weather forecasts designed specifically for astronomers. They forecast the cloud cover , transparency and astronomical seeing , parameters which are not forecast by civil or aviation forecasts. [ 1 ]

4. Twilight phenomenon - Wikipedia

   en.wikipedia.org/wiki/Twilight_phenomenon

   Twilight phenomenon (seen from the Louisiana-24 Long Range Tracking Telescope site in northern Santa Barbara county) lights up the night sky over Vandenberg Air Force Base following the launch of a Minuteman III missile September 19, 2002 (Official USAF Photo by Dennis Fisher, 30th Communications Squadron) Twilight phenomenon caused by freezing unspent fuel from a Minotaur I launch at ...

5. Mysterious streaks of light spotted in night sky over California

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6. How does Doppler radar work? Is it accurate? Here’s what to ...

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7. Golden hour (photography) - Wikipedia

   en.wikipedia.org/wiki/Golden_hour_(photography)

   [1] [2] During these times, the brightness of the sky matches the brightness of streetlights, signs, car headlights and lit windows. The period of time shortly before the magic hour at sunrise, or after it at sunset, is called the "blue hour". This is when the sun is at a significant depth below the horizon, when residual, indirect sunlight ...

8. Waves up to 30 feet forecast to rock California coast, days ...

   www.aol.com/waves-30-feet-forecast-rock...

   The National Weather Service issued high surf advisories Thursday morning for large portions Northern California, with waves up to 30 feet high expected to hit portions of the coast until Sunday.

9. Weather radar - Wikipedia

   en.wikipedia.org/wiki/Weather_radar

   Weather radar in Norman, Oklahoma with rainshaft Weather (WF44) radar dish University of Oklahoma OU-PRIME C-band, polarimetric, weather radar during construction. Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.).