If SUN is burning since millions of years why its intensity is not deteriorating?

Answer 1

Because stars don't work that way.

The sun briefly went through a "blue-star" phase when it first formed... at this time the Sun was larger than it is now, as the hydrogen cloud that became the Sun drew in tighter and tighter. At this point the Sun may have briefly been much brighter than today, when nuclear fusion first kicked in. Within thirty million years, gravity pulled the Sun into the yellow dwarf form in which we see the Sun today.

As the Sun ages, the fusion process intensifies... the Sun is getting steadily warmer, and will only increase its output until the Sun begins to run out of Hydrogen, the 'fuel' that drives the sun, and which it still mostly consists of.

When the Sun starts to run out of fuel, it will swell in size, expanding so far that the photosphere (surface) of the Sun will extend all the way out to Earth. At this point, the Sun will cool somewhat... once it runs out of fuel.

But until then, the foot is on the accelerator.

Answer 2

It is thought that our sun is undertaking a great cycle that will eventually end in a supernova. But before we get there the sun is actually going to grow in size and for us that will mean a spike in temperature globally although 10 000 or 10 000 000 more years will have to pass before we see any real changes. It will turn a darker orange before going red and then finally after it's destruction it will likely turn into a white dwarf and a black hole destroying most if not all of the inner solar system in it's wake and the rest in time. Hopefully we as a species have moved to a more favorable planet or evolved to some magnificent existence where we don't need a planet to sustain us.

Answer 3

The nuclear fusion going on inside the sun stays fairly constant because it is moderated by the force of gravity. All the mass of the sun is pulling itself inward all the time, while the tremendous energy generated by the fusion of hydrogen atoms is pushing outward all the time. The two forces keep each other in a pretty consistent balance. But there is plenty of fuel there.

At some point in the future (I think like hundreds of millions of years from now) the sun will have exhausted so much of its fuel that the gravity will eventually win out. The sun will implode on itself and then I think it will balloon back out, becoming what we call a "red giant."

There are lots of good websites like www.space.com where you can learn more about the life cycles of stars and other celestial objects.

Answer 4

The sun has since the beginning been burning it's energy off - very slowly. At this point, (5 billion years into it's life,) the sun is at it's half life. In another 5 billion years it will supernova and eventually turn into a black hole. And yes, it's intensity is slowly deteriorating.

Answer 5

Actually, the sun is heating up by 30 % every billion years. As the fuel in the core diminishes, the sun shrinks a bit which compresses and heats up the core.

Answer 6

Actually, in the long run it is. Right now, it is continually making enegy by turning Hydrogen into Helium. At some point it will run out of Hydrogen and begin enlarging to become a red giant. It will start breaking down other elements.

Answer 7

Because it still has enough fuel to carry on burning for the next 5 billion years.

The fusion process will finish, and then it will explode into a red giant I guess...

Answer 8

It is a super compressed ball of flaming gas that will burn for billions of more years. It has no shortage of fuel, that is why it can burn like it does.

Answer 9

The life span of a star is billions of years old. The sun is in it's adolescent years. Eventually, it will become a red giant, then it will super nova.

Answer 10

The sun is deteriorating.