A brief introduction to the dog constellation.

Abbreviation: CVN

Zodiac killer: No.

Location: Near Capricorn, Ursa Major, Leo and Ursa Major.

Size ranking: 38

Area: 465 square degrees

Width: about 30 degrees

Depth: about 20 degrees

The month that reaches the highest point at 22: 00: April to May.

You can observe the latitude range of the whole constellation: 90 N to 37 s.

Others: Originally a part of Ursa major, draw a straight line from Alpha and Gamma in Ursa major, and extend it to a large angle for about twice, then you can find Alpha in Ursa major. It forms an equilateral triangle with the beta star of Leo and the big horn of Capricorn. In this way, you can also find the alpha star of Canis Canis.

Except for Alpha (2.9m) and Beta (4.3m), all the dog constellations are dark stars, so this constellation looks deserted and there are no hounds at all.

On a clear moonless night, a very dim star can be found at the midpoint of the connecting line between Alpha Canis and arcturus, sometimes even with the help of a small telescope. Observing under a large telescope, it turns out that it is not a star, but a cluster of more than 200 thousand stars. This large cluster in Canis is spherical with a diameter of 40 light years, which is called "globular cluster" in astronomy. There is a spiral galaxy in the north of Canis Canis, which is about1400 million light years away. Canine constellation

Small telescopes such as Canis A (cor caroli) binary stars 2.9 and 5.6 should all be white, but some observers claim to see elegant colors. By studying the spectrum, it may be because brighter stars have unusual compositions. M3 globular cluster telescope or small telescope is about half a full moon. If you want to observe the stars in a cluster, you must use a telescope with a diameter of 10 cm or more.