Astronomical seeing refers to the clarity and stability of the Earth's atmosphere when observing celestial objects. It affects how sharp and detailed images appear through telescopes. Good seeing conditions allow astronomers to see fine details on planets and stars, while poor seeing can blur these images. Factors influencing astronomical seeing include atmospheric turbulence, temperature variations, and wind. These elements can cause light from distant objects to bend and distort, leading to a shimmering effect. Astronomers often use a scale to rate seeing conditions, helping them determine the best times for observations.