the 13 zodiac signs
There is no other common name for constellation. (The term "sign" is related, but it is not the same.)
Where are the stars in a constellation located relative to each other
Leo is a constellation, that is to say, a direction in the sky. Just as in any other constellation, there are lots of galaxies in this constellation.
second biggest constellation
Yes, there is a constellation with that name. "Hercules" also has several other meanings.
The constellation Delphinus is also known as the Dolphin constellation. It is sometimes referred to as Job's Coffin due to its coffin-like shape in some cultures.
The Pisces constellation is actually bordered by several other constellations: Triangulum Andromeda Pegasus Aquarius Cetus Aries
Billions or trillions of stars, just like any other constellation. A constellation is basically a general direction in space.
There is no zodiacal constellation north of other zodiacal constellations. A zodiacal constellation is a constellation that is along the ecliptic. There are zodiacal constellations to the left and right of Aquarius (Pisces & Capricornus, respectively), but just other, regular constellations above and below Aquarius.
The swan constellation, also known as Cygnus, is commonly seen near the heart of the Lyra constellation, which is represented as a harp. They are neighboring constellations in the night sky.
No, it's the other way round - the Little Dipper is part of a constellation, the constellation of Ursa Minor.
In total, there are 364 stars and other astonomical objects in the constellation.