Hydrogen, helium, and other ionized gases
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
The Lagoon Nebula is located in the constellation Sagittarius. It is a prominent emission nebula and can be seen with the naked eye from a dark location.
Another popular nebula is the Eagle Nebula, also known as Messier 16. It is located in the constellation Serpens and is famous for the "Pillars of Creation," which are towering columns of interstellar gas and dust where new stars are forming.
That depends what you include in the "Solar System". The Oort Cloud - a group of comets - is believed to be at a distance of about 1 light-year from the Sun; that would give a diameter of about 2 light-years. If you only include the 8 major planets, the size of the Solar System is only a fraction of a light-year. (A light-year is the distance light travels in a year; light gets from the Sun to the farthest planet in just a few hours.)
Two well-known nebulae are the Orion Nebula (Messier 42) and the Crab Nebula (Messier 1). The Orion Nebula is a diffuse cloud in the constellation Orion, visible to the naked eye, while the Crab Nebula is a remnant of a supernova explosion observed in the year 1054.
the sky
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
Considering the distance to the Cats Eye Nebula is only 3,300 light years away, it is going to be within our own Milky Way Galaxy.
According to Wikipedia: Radius Core: 0.2 ly
The eye of god is a Helix nebula. Close to a Planetary nebula.
Not "a" - it's the name of one specific planetary nebula. You can find pictures of it in Google Images.
The Cat's Eye Nebula [See Link] is a planetary nebula in the constellation of Draco.Observations with the Hubble Space Telescope revealed remarkable structures such as knots, jets and sinewy arc-like features.
The Cat's Eye Nebula appears in the constellation of Draco.
The Lagoon Nebula is located in the constellation Sagittarius. It is a prominent emission nebula and can be seen with the naked eye from a dark location.
Swan. To me, that doesn't rhyme. The answer may be the "prawn nebula".
It is a cat's eye.
Another popular nebula is the Eagle Nebula, also known as Messier 16. It is located in the constellation Serpens and is famous for the "Pillars of Creation," which are towering columns of interstellar gas and dust where new stars are forming.