From blue to red, the evolution of a universe.

This is all just based on my own thoughts and logic.
When our galaxy burst into existence, aided by the explosion of our sun being born.
The sun would have been a blue dwarfe, a lot hotter than it is now ( presumably), as every thing started to cool as the sun cooled (however long that took) planets formed and all that business.

This is we're I think it gets interesting, the sun was most likely too to for earth to sustain life, it could have sustained life on mars for maybe a few billion years???
It cooled though down to a yellow sun and life could have just died out.
It was still very hot though as earth came into its ideal temp for life. Most creatures had incredibly thick skin ideal for the heat like dinosaurs life found the only things that could live on the harsh arid plains in the hot light of a young yellow sun.
They got wiped out, and as the sun has one on it has cooled even more and allowed other species more capable of surviving the mid cooler stages of the suns growth. I can only assume this prime stage lasts longer than the blue dwarf and red dwarf stages, ( maybe wrong).
But the sun is cooling and will continue to do so until it reaches the red dwarf stage, this could very well be the end of us and could create new life or just kill the planet. Sometime after that it will implode and Create a black hole will consume anything nearby that survived the implosion.

Clearly all this is written in laymens terms and the deeper scientific reasons (that should just be implied) have been completely glossed over, but I think you get the idea of how things can change throughout a galaxies lifespan.

Interesting thought.
btw, our sun is far too small to become a black hole. it will go into white dwarf, then over time simply flicker out.

but...

Even if it did become a black hole overnight..it wouldn't effect the earth or anything else really. its mass would remain consistant with what it is now...turning into a black hole doesn't suddenly start gaining more mass..it just collapses into itself...meaning if a planet was there before the collapse, it will still be there, with the same trajectory, etc...

Once again though, our sun will not have that fate (unless like..many other stars suddenly pop into our neck of the woods and collide/merge with our sun...but we would have much bigger things to worry about at that point if that happened)

Actually as far as we know through observation your theory is backwards. The sun started out cooler and grew with fusion as it is a giant fusion engine! It basically burns Hydrogen into Helium, soon it will fuse the helium into heavier elements becoming larger and hotter! Expanding into a Red Giant finally collapsing in on itself into a cold white dwarf.

We might be going from Red to blue...watch the avengers again and pay close attention to Ironman...
Do not take this as a joke if your thinking meta then look up red & blue then you will see it all over fiction...more specifically Blue and Orange...

Here is the Rabbit hole you are looking for.
www.slashfilm.com...

When our galaxy burst into existence, aided by the explosion of our sun being born.

reply to post by Chukkles


Huh? I think you are confused. Our galaxy didn't "Burst" into existence, our sun is not the center of the galaxy, and, our sun didn't contribute to the formation of the Milkyway galaxy.

reply to post by Chukkles


As others have posted . . . You have it all backwards and are mistaken about terminology and the dynamics of this system. Here is a short youtube on the dying of the Sun and what will happen to this solor system, which will save a lot of typing:



Our solar system is on the outskirts of the Milky Way galaxy and formed as a result of interactions in the galaxy, after initial formation, hence no "bursting" for either. Here is a short video that explains through simulation:


When the largest stars (not the Sun, which is relatively small) in the cosmos die, they will explode in a Supernova. This results in a stellar mass black hole, but not supermassive black holes, which we are still trying to understand. And since I said "cosmos" earlier . . . here is some Carl Sagan . . . just for the hell of it.


YouTube and Google can be your friend . . . there are plenty of docs out there on the formation on the universe and our solar system's place in it. Enjoy!

You might want to recheck your facts, because there are numerous misconceptions in your post. Our sun was never a blue dwarf. That stage doesn't happen until after red dwarf, which comes after the sun has used most of its energy. Our solar system was originally a binary system. One of the two stars went supernova and the other star absorbed a lot of the energy, becoming a yellow dwarf(our sun). The remaining debris and energy gathered up together and formed our planets as we know them today. Also the sun is not getting cooler, it's getting warming. In around 1 billion years from now the average temperature on earth will be around 130 degrees. This will be a big issue that whatever life is still around on earth is going to have to face or die out. So if anything, Mars might become a viable planet in the future, plus it is well known that atmosphere determines the planet's temperature, not only the sun. There will be a comet hitting Mars in another year or so that could very well turn Mars into a greenhouse, making it hotter than the earth, like Venus.