On the influencing factors of astronomical observation

Natural factors affecting astronomical observation effect

We know that astronomical observation is greatly influenced by external factors. So astronomy enthusiasts need to pay more attention. The following are some important factors:

1. Light pollution: Try not to use your telescope around the light. High power astronomical telescope is very sensitive to light. Near the city, the influence of light is more obvious. It seems that many stars will disappear on the horizontal plane near the city. The hot air on the earth's surface will also cause air fluctuation, distorted images and deformation, which will cause poor observation.

2. The observation angle formed by telescope, star and horizon has great influence on the observation effect. If the measured star is near the horizon, the target will be blurred. The air around the earth is always moving. This movement and rotation of the atmosphere will cause bad images especially at high magnification. Maybe in a few nights, the observation will improve.

Moonlight may also be another factor that affects observation. A dazzling full moon or bright moonlight will blur nearby stars or planets, and the moon itself is the best observation state at night and dawn. Try to avoid looking through the open window, especially in the cold season. The large temperature difference between indoor and outdoor will make the observation quality the worst.

4. Clouds accumulated in the sky can't penetrate observation, but fortunately, these clouds will move frequently. The stars flash quickly because of the convection of cold air and hot air, which will cause bad observation, so try to observe when the stars are stable at night.

Under the fog, it will also cause bad conditions. Under the fog, the atmosphere is usually relatively stable and may be observed. Starlight is always as big as a needle, so far away, it is impossible to distinguish different points with low or high magnification of a telescope.