millions of years
1 billion years
Hydrogen has one core electron. Core electrons are those in the inner energy levels of an atom and are not involved in chemical bonding.
It just stays there waiting to be used-the sun has enough to last many billions of years and luckily for us the rate of burning has stayed fairly constant so far, but eventually it will run out of hydrogen and die.
Scientists estimate that the Sun has about 5 billion years left before it exhausts the hydrogen in its core and leaves the main sequence. As it approaches this stage, it will gradually evolve into a red giant. This process marks a significant transition in the Sun's life cycle, ultimately leading to its transformation into a white dwarf after shedding its outer layers.
the Leo last around 2165 years.
There have been six leap years in the last 25.
i think it last 5-10 years
They easily last 30 to 40 years, if not longer.
4 years
It will eventually. In about 5 billion years the sun will deplete the hydrogen at its core. Afterward it will continue to alternate between fusing helium in the core and fusing hydrogen in a shell around the core before it finally dies.
70 in the last 15 years
The temperature at the Sun's core is about 15 million degrees Kelvin. This extreme heat is generated by nuclear fusion reactions that convert hydrogen into helium.