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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 ]
According to the seven-day forecast from the National Weather Service of Louisville, Monday, April 8 is expected to be mostly sunny with a high near 74 during the day. There's a 10% chance of ...
In astronomy, seeing is the degradation of the image of an astronomical object due to turbulence in the atmosphere of Earth that may become visible as blurring, twinkling or variable distortion. The origin of this effect is rapidly changing variations of the optical refractive index along the light path from the object to the detector.
Experts recommend stargazing on the nights surrounding the new moon as it is the time when the sky is the darkest. In 2025, the new moons during summer fall on June 25, July 2, Aug. 23 and Sept. 21.
The aurora is expected to be bright and visible in multiple northern U.S. states Oct. 3 through Oct. 5 as well as from the lower Midwest to Oregon.
Clear Sky Chart Weather forecasts designed for amateur astronomers. List of astronomical societies; List of telescope parts and construction; Messier catalogue A set of astronomical objects catalogued by the French astronomer Charles Messier in 1771, which is still used by many amateurs as an observing list. Observation; Observational astronomy
Department of Physics and Astronomy at UNCG; Three College Observatory Clear Sky Chart Forecasts of observing conditions. This page was last edited on ...
Robert Brownlee Observatory Clear Sky Clock Forecast of observing conditions. This page was last edited on 8 February 2023, at 15:31 (UTC). Text is available ...