What is the diameter of earth?

• 12,756kilometers

• 12,012 kilometers

• 15,931kilometers

• 8,000 kilometers

solar system

• planet and Sun

• Planets and Stars

• 2 galaxies

• 2 or more Galaxies

Milky Way

• Planets and Stars

• planet and Sun

• 2 galaxies

• 2 or more galaxies

The local Group

• 2 galaxies

• 2 or more Galaxies

• 4 galaxies

• 1 galaxies

what is the question below is the correct for the composition of nebula

• Gasses

• Rock

• Dust

• Water

How many percent of a universe does dark energy is?

• 71.4%

• 32%
• 50%
• 85%

What is the reason of expanding of universe

• The universe is static and unchanging.
• The universe is expanding due to dark energy.
• The universe is expanding due to the presence of black holes.
• The universe is contracting due to gravity.

How many percent of universe does dark matter is

• 24%

• 50%
• 5%
• 15%

what is the reason why universe is dark

• The universe is dark due to the absence of light sources.
• The universe is dark because it is made entirely of black holes.
• The universe is dark because the black holes absorbing light

• The universe is dark because it is a giant shadow cast by a celestial body.

How many percent of universe does baryonic matter is

• 4.6%
• 25%
• 1%
• 10%