What are the main characteristics of Ursa major?

The beauty of the starry sky always leaves a deep impression. Ursa major is one of the constellations, and the Big Dipper is there. Let's use astronomical phenomena to understand the main characteristics of Ursa major.

The whole northern sky is a dark star, and only Polaris and Big Dipper are brighter, so these two constellations are very easy to identify. Ursa major is brighter than Ursa minor, but Polaris on Ursa minor's tail is the only second-class star in the northern sky, and it is also the only star in the whole starry sky whose position is relatively constant and does not rotate. Polaris can be found at five times the opening of Cassiopeia W. The bear's Big Dipper will revolve around Polaris, which will be above the horizon all night.

After you find Polaris in Ursa major, you can always find Ursa minor, because Polaris is also the last star at the tail of Ursa minor. Conversely, starting from Ursa Major, you can easily find Ursa Major.

The character of Ursa minor is Polaris, while the main character of Ursa major is the Big Dipper, which consists of seven bright stars. Ursa major is undoubtedly the most striking and important constellation in the northern sky, and astronomers all over the world attach great importance to it. We often say that "the sky is full of stars", which shows that China people simply regard Beidou as a synonym for the stars in the sky.

URSAMAJOR English name: thegreatbear Size: Very large, the third largest in the whole day, second only to Ophiuchus and Virgo. Observation time: it is easier to observe from February to June, and it is easiest to observe in April (note: the best observation time in the northern hemisphere is 30° N-50° N). Observation latitude: 90° N-30° S Visible meteor shower: Leonid meteor shower (radiation point is located in Leo, adjacent to Ursa Major). Adjacent constellations: Dragon Constellation, Deer Leopard Constellation, Tmall Constellation, Little Lion Constellation and Big Bear Constellation are the oldest of all constellations, and their history can be traced back to at least the last ice age. For observers in areas above 40 north latitude, Ursa Major is an arch constellation, and most of its areas, including the Big Dipper, are near the celestial pole, and can be seen in most parts of China all year round.

Name of the Big Dipper: Big Dipper I, Shu Tianxing: Alpha Ursa (Shu Tian, Wolf Star) Big Dipper II, Tian Xuan Constellation: Beta Ursa (Tian Xuan, Giant Gate Star) Big Dipper III, Scorpio Constellation: Gamma Ursa (Scorpio, Lucunxing) Big Dipper IV, Tianquan Constellation: Delta Ursa (Tianquan, Tiancunxing).

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