Correct Answer:
Option C - The clouds of dust, hydrogen, helium and other ionized gases occupying the space between stars is known as Nebulae. The closest known nebulae to the earth is called the Helix nebula. It is approximately 700 light-years away from the earth. A nebula depends for it luminosity upon the presence of stars that have either arise from it or contained in it.
C. The clouds of dust, hydrogen, helium and other ionized gases occupying the space between stars is known as Nebulae. The closest known nebulae to the earth is called the Helix nebula. It is approximately 700 light-years away from the earth. A nebula depends for it luminosity upon the presence of stars that have either arise from it or contained in it.