太空里有多少星座呢英语

There are 88 officially recognized constellations in the night sky, as designated by the International Astronomical Union (IAU). These constellations are distributed across three distinct regions: 29 in the Northern Hemisphere, 47 in the Southern Hemisphere, and 12 along the celestial equator.

The concept of constellations has evolved over millennia, with different cultures identifying various patterns of stars that resembled objects, animals, or mythological figures. The modern system of 88 constellations is largely based on the traditions of ancient Greece and other early civilizations. The IAU formalized this system in 1928 to standardize the way we map and understand the night sky.

Each constellation is defined by the boundaries set by the IAU, which ensure that every star in the sky belongs to a specific constellation. These boundaries often do not align with the patterns formed by the brightest stars within each constellation but are instead based on precise coordinates and divisions of the celestial sphere.

The 88 constellations vary greatly in size and the number of stars they contain. Some, like Ursa Major (the Great Bear), are easily recognizable and prominent, while others, such as Camelopardalis (the Giraffe), are less well-known and more difficult to observe without the aid of a telescope.

In summary, the night sky is divided into 88 constellations, each with its own unique history and characteristics. These constellations help astronomers navigate the vast expanse of the universe, providing a framework for understanding the positions and movements of stars and other celestial objects.