Quick Answer
Polaris might be hard to locate sometimes due to its low altitude in the sky, atmospheric distortion, and the presence of obstructions such as trees or buildings.
Atmospheric Distortion
Atmospheric distortion can make Polaris harder to spot. This occurs when the light from the star passes through varying layers of air with different temperatures and densities. The result is a twinkling effect or a distortion of the star’s apparent position. This is more pronounced when the star is low on the horizon, as the light has to travel through more of the Earth’s atmosphere.
Obstructions and Tree Canopy
Obstructions such as trees or buildings can also block or obscure your view of Polaris. To locate the star, it’s essential to find a spot with a clear view of the northern horizon. A good rule of thumb is to look for a spot with a line of sight at least 30 degrees above the horizon.
Low Altitude in the Sky
Polaris is not always visible in the sky due to its declination. It reaches its highest point in the sky at around 40 degrees north latitude, which means that at lower latitudes, the star will be relatively low on the horizon and harder to spot. At latitudes below 30 degrees, Polaris will be below the horizon for most of the year.
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