SOLAR SYSTEM

Detailed explanation-1: -After spending about 1 billion years as a red giant, our own sun will become a white dwarf, packing most of its initial mass into a sphere roughly the size of Earth. This fate awaits many other stars as well-all of them that are less than about eight times more massive than the sun, in fact.

Detailed explanation-2: -In about 5 billion years, the Sun will start to run out of hydrogen in its core to fuse, and it will begin to collapse. This will let the Sun start to fuse heavier elements in the core, along with fusing hydrogen in a shell wrapped around the core.

Detailed explanation-3: -JOSHUA: Right, so the sun is about four and a half billion years old, and in about five billion years, it’s going to start to run out of its fuel. And then it will expand into what’s known as a red giant. So it’s going to expand to about a hundred times its size.

Detailed explanation-4: -A: Roughly 5 billion years from now, the Sun will exhaust the hydrogen fuel in its core and start burning helium, forcing its transition into a red giant star. During this shift, its atmosphere will expand out to somewhere around 1 astronomical unit-the current average Earth-Sun distance.

Detailed explanation-5: -Once a star’s core runs out of hydrogen, however, that state of equilibrium is lost and the core begins to collapse. As the core collapses, the shell of plasma surrounding the core becomes hot enough to begin fusing hydrogen itself.

Detailed explanation-6: -Once all the helium disappears, the forces of gravity will take over, and the sun will shrink into a white dwarf. All the outer material will dissipate, leaving behind a planetary nebula.

Detailed explanation-7: -Once the Red Giant phase is complete the Sun will evolve into a White Dwarf, during which it will lose about half of its mass. As the Sun loses mass the radii of the orbits of the remaining planets, from Jupiter outward, will increase, but still remain in orbit around a now lighter Sun.