The moon and the sun are the brightest objects in our night sky and the two most common objects we see when we look up at the stars. Sometimes, we find that the moon looks as big as the sun, why is that?
In fact, the size of the moon and the sun are very different, and their diameter ratio is about 400:1. So, why do they look the same size?
First, we need to understand that the visual size of the Moon and Sun is determined by their apparent diameter. The apparent diameter refers to the size of the viewing angle of a celestial body as observed from the Earth. Since the Earth is about 380,000 kilometers from the Moon, and about 1500 million kilometers, therefore, the apparent diameter of the Moon and the Sun is affected by their distance from the Earth.
When the moon and the sun appear to be the same size, their apparent diameter is the same. This means that they must be at the same distance from the Earth. In fact, the average distance between the Moon and the Sun and the Earth is different, with the Moon about 380,000 kilometers and the Sun about 1500 million km. However, when the Moon and the Sun are close to each other from the Earth, their apparent diameters become the same.
Specifically, the situation where the moon appears to be the same size as the sun occurs at the beginning or end of the lunar month. At the beginning of the lunar month, the Moon is placed between the Sun and the Earth, and at this time the Moon and the Sun are at the same angular position, so their apparent diameters appear to be the same. And at the end of the lunar month, the moon and the sun are also in the same angular position, so they appear to be the same size. This phenomenon is known as "the sun and the moon side by side" and is a very beautiful astronomical phenomenon. Since the moon and the sun have the same apparent diameter, their edges look very clear and there is no blurring sensation. At this time, the shooting is also very artistic, and it is one of the subjects that many photographers like to shoot. **10,000 Fans Incentive Plan