Cancer (Kark)
Cancer, resembles the shape of a crabs, when stars in this constellation are imaginarily connected, as per Indian mythology!
Where should I see…Gemini and Canis Minor, are the constellations which is towards west of Cancer constellation. If you move your eyes towards east, you 
will see another constellation named Leo. In the North of Cancer, you will find Lynx and Leo Minor and in South, Hydra. Cancer is halfway between celestial equator and North Pole, and so is fully part of Northern Hemisphere.
It covers up 506 square degree area of the sky. Area wise it is 31st largest constellation in the sky.
When and What can I see…It is on the zodiacal belt and hence is the 4th zodiac on the zodiac belt. Sun enters in this constellation from 20th July to 10th August. It is 
best observed during October to June, as seen from India.
All you need is your naked eyes other than clear skies to see 106 stars of this constellations, as they are the one which are brighter than the lower limit of our naked eyes (i.e. 6.5 apparent magnitude) to see faintest stars. The brightest star of this constellation is Tarf.
Constellations are made up of single, binary (apparent and absolute), multiple and variable stars.
Out of total 106 stars of different types, here is the list of 20 brightest stars as per their nature:
| Binary / Multiple Star system | Variable Stars | Binary / Multiple and Variable Stars | Single stars |
| 1 | Asellus Australis | Acubens | 8 |
| – | Asellus Borealis | Tarf | – |
| – | Nahn | 3 | – |
| 3 | – | – | |
| 1 | 6 | 5 | 8 |
Mythology stories…
As per Hindi mythology, there are no such known stories for this constellation.
Deep Sky Objects…
All the stars that we see naked eyes, all belong to our own, Milky way galaxy (Akash Ganga Tara Vishv). Bright stars can be seen naked eye and faint one through telescope. But the curtain of sky that we see in 2D is actually a huge universe we are talking about, with 3 dimension. There are many nebulous objects visible in every constellations. They differ widely by distances and nature. Like Emission Nebula, Reflecting Nebula, Absorption Nebula, Star Birth Nebula, Supernova Remnants (SNR) and Open Stars cluster which are within the disk of our own Milky Way galaxy. Globular cluster are also found, which are in the halo of our galaxy and some most distant objects like galaxies are also visible through telescope. Such objects are defined as “Deep Sky Objects”.
In this constellation there are 354 such different types of Deep Sky Objects observed. Below is the list of 20 brightest Deep Sky Objects:
M67 or NGC 2682 || Open Cluster
NGC 2535, NGC 2536 || Interacting Sprial Galaxies
NGC 2775 || Spiral Galaxy
M44 || Beehive / Praesepe Cluster || Nearest
| Galaxy | Open Cluster | Globular Cluster | Nebula | Supernova Remnant | ||
| Naked eye visibility | – | M44 (Beehive Cluster) | – | – | – | |
| Visible through Telescope | 18 | M 69 (King Cobra Cluster) | – | – | – | |
| 18 | 2 | – | – | – |