Our Milky Way galaxy will likely collide with the neighboring
Our Milky Way galaxy is destined to collide with our closest large neighbour, the Andromeda galaxy, in about five billion years. Scientists can predict what's going to happen. The merger will totally alter the night sky over Earth but will likely leave the solar system unharmed, according to NASA.
The eventual merger is still at least 2.5 billion years away. So our home planet and the solar system is safe until then. But after that, it is bad news for Earth. Depending on the position of the solar system, Earth can be exposed to more radiation from nearby stars resulting in inhospitable temperatures.
Astronomers estimate that 3.75 billion years from now, Earth will be caught up amid the largest galactic event in our planet's history, when these two giant galaxies collide. Luckily, experts think that Earth will survive, but it won't be entirely unaffected.
And the newly formed super-galaxy, dubbed 'Milkomeda', will also ultimately spell disaster for Earth as our planet is flung out into interstellar space.
Now the Andromeda galaxy can be seen with the naked eye, like a tiny dot in the sky. But in three billion years it will be so clearly visible to the naked eye that it will even be possible to see individual spiral arms in it.
Could a planet ever collide with Earth? Scientists say it's highly unlikely. While large-scale collisions were prevalent when our solar system was young, it would be extremely rare for one to occur in a stable and established system like our own.
Eventually humans will go extinct. At the most wildly optimistic estimate, our species will last perhaps another billion years but end when the expanding envelope of the sun swells outward and heats the planet to a Venus-like state. But a billion years is a long time.
Scientists are still debating whether or not our planet will be engulfed, or whether it will orbit dangerously close to the red giant sun. Either way, life as we know it on Earth will cease to exist. In fact, surface life on our planet will likely be wiped out long before the sun turns into a red giant.
Even traveling at the speed of light, it would take nearly a hundred thousand years!
The technology required to travel between galaxies is far beyond humanity's present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.
So, while Earth will eventually leave the solar system one way or another, it's not something we will have to worry about for a few billion years yet. Probably.
Our galaxy's spiral arms will disappear, and so will our supermassive black hole. Andromeda's central black hole has the mass of 100 million suns, and it will quickly swallow up our own, which has a comparatively tiny mass of 4 million suns. “It's going to be like, bloop, done,” Mingarelli said.
In its final throes, the star will devour the inner planets, leaving Earth to either burn up with it, or freeze over from the cold abyss without a star to keep it warm.
Can the Andromeda Galaxy support life? Since we can't yet say for certain whether there are any other stars in our own galaxy that host life, it is even harder to say whether there might be life, or at least the conditions for life, in another galaxy.
Our home galaxy, the Milky Way, has a supermassive black hole at its center, but we've never actually seen it – until now.
During that growth spurt, the sun will absorb Mercury, Venus, and possibly Earth, according to NASA. "If it's any consolation, this will happen in about 5 billion years," said co-author Morgan MacLeod of the Harvard-Smithsonian Center for Astrophysics.
As a red giant, our Sun will expand and heat up, forcing its current habitable zone, which now encompasses Earth, outward.
Will the Sun become a black hole? No, it's too small for that! The Sun would need to be about 20 times more massive to end its life as a black hole.
According to a US report, the sea level will increase by 2050. Due to which many cities and islands situated on the shores of the sea will get absorbed in the water. By 2050, 50% of jobs will also be lost because robots will be doing most of the work at that time. Let us tell you that 2050 will be a challenge to death.
The model, called Mindy, provides a terrifying glimpse at what people could look like in 800 years if our love of technology continues. According to the company, humans in the year 3000 could have a hunched back, wide neck, clawed hand from texting and a second set of eyelids.
For men, the group expects they will live to be 83 to 86 instead of the government's projection of 80 years average life expectancy in 2050. S. Jay Olshansky, co-author of the report, said a few extra years life might not sound important, but it will cost us socially and financially.
NASA scientists have identified a planet like Earth
Named TOI 700 e, this new planet orbits within its star's habitable zone, which also hints at the presence of water on its surface.
Perihelion and Aphelion in 2023
This year, Earth will be 91,403,034 miles away from the Sun at perihelion and 94,506,364 miles away from the Sun at aphelion.