Will the Sun cease to shine?
The Sun, currently yellow, will appear red in the red giant stage, then white in the white dwarf stage and finally black in the black dwarf stage. When it becomes a black dwarf, the Sun will cease to shine.
How long will the Sun continue to shine in a stable fashion as at present?
About five to eight billion years more.
What will happen to the Sun after five to eight billion years?
The Sun will cease to be stable and will expand into a giant star categorized as “Red Giant”.
What is a Sun pillar?
A Sun pillar is an optical illusion of a vertically stretched image of the Sun, formed in a manner similar to mock Suns.
Can ice crystals in the clouds cause mock Suns and solar haloes similar to mock Moons and lunar haloes?
Yes. Mock Suns are also known as perihelia.
Is mankind doomed to extinction when the Earth becomes uninhabitable?
Hopefully by the time Earth becomes uninhabitable, mankind would have sufficiently progressed technology to leave the Solar System in spaceships and colonize other parts of the galaxy.
At what stage in the life of the Sun, will the Earth become uninhabitable?
When the Sun starts becoming a red giant, the Earth will become so hot that everything will start melting. Obviously, life on Earth will cease to exist.