Our Stellar system

Now let me zoom in on that little star system called Solar System - this is where Earth is.
It's a rather simple stellar system with 1 giant star we call Sun, & has 8 planets, a few dwarf planets, asteroids, among others. Solar system is about 4.5 billions years old (formed from a collapsed giant hydrogen molecular cloud), between 2 to 3 light years in diameter; and our own star is currently on "main-sequence" stage, and when the hydrogen supply runs out about 5+ bn yrs from now- it will tranform into a Red Giant star (increasing its size by 260x overlapping Earth's orbit), then transforms yet again into a white dwarf star after it 'ejects' its outer layer. (No, it doesn't have enough mass/size to form a supernova).

Our system has 4 terrestial planets (the 4 nearest from the Sun, including Earth), the rest are just giant gaseous bodies. So far, we have not discovered any "carbon-based life form" (similar to Earth's life) outside our own planet. :)

Now, does this techy stuff has anything to do w/ 'Save the Environment' thing - NADA! hahaha!
for now...