Question

Current observations suggest that the density of luminous matter (Ωluminous), all matter (Ωmatter), and dark energy (ΩΛ) are:

Answer 1

The density of luminous matter, all matter, and dark energy in the universe can be described as follows: luminous matter contributes 1% of the mass needed to reach critical density, hydrogen and helium contribute 4%, dark matter contributes 27%, and dark energy contributes the remaining 68%.

Step-by-step explanation:

The density of luminous matter (Ωluminous), all matter (Ωmatter), and dark energy (ΩΛ) are as follows:

• Luminous matter, which includes stars and galaxies, contributes about 1% of the mass required to reach critical density.
• Another 4% of the mass is mainly in the form of hydrogen and helium in the space between stars and in intergalactic space.
• Dark matter accounts for about 27% of the critical density.
• The remaining 68% of the critical density is supplied by the mass equivalent of dark energy.