Molecular Cloud

About Molecular Cloud:

• It is an interstellar cloud of gas and dust in which molecules can form, the most common of which is Hydrogen (H2).
• Properties of Molecular Cloud:
  • These are characterized by their low temperatures (below 40 K, colder than liquid nitrogen) and relatively high densities.
  • Size: The size of these clouds can be from a few light years up to 600 light years. Their total mass can reach several million solar masses.
  • Molecular clouds with dimensions of more than about 15 light years are also called giant molecular clouds.
  • The complex interplay between three key forces, namely gravity, magnetic fields, and turbulence, determines how these clouds collapse to form stars.
  • The central regions of these clouds are completely hidden from view by dust. 
  • They are the raw material of stars and planets. These clouds do not last for a very long time.
  • After the new stars are born, their solar winds blow away the remaining gas and dust. 
• Significance of Molecular Cloud:
  • Molecular clouds are so important because they are the raw material of stars and planets.
  • It is thought to be the birthplace of stars and planetary systems through processes of contraction, condensation, and accretion.