To the naked eye, the brightest star in the sky is

Sirius is the brightest star with a brightness magnitude of-1.46, but the five planets we often say are actually very bright. Venus (magnitude -4.8), Jupiter (brightest time -2.9) and Mercury (-1.9) are brighter than Sirius, but Mercury is hard to see. It is too close to the sun, and it is already dawn when you can see it. Besides the moon, the brightest star in the night sky is Venus, which is often brighter than all the stars in a whole day combined.

Mars is brighter than Sirius in many cases, so judging Sirius depends not only on brightness, but also on location. And Sirius is not a planet, its position is fixed, as long as you remember the position of Sirius, you can see it at a glance in the clear night sky.

Because Orion is the most recognizable constellation at night.

Generally, it is easy to see it in the night sky in the southwest from 9: 00 pm to 10 pm. There are three bright big stars in its center, which was called Fu Lushou Samsung in ancient China, and we can regard it as the belt of Orion.

There are two bright stars above and below these three stars, and there is a star that is not particularly bright above the middle of the above two stars. Together, they form the body of Orion. On the right side of Orion, it is a bow-shaped arc composed of many stars. In short, Orion is like an Orion who shoots an arrow with a bow, hence its name.