The eternal dance of light in the night sky has fascinated human kind for thousands of years, given birth to gods, myths and finally to science.
Here we’ve put some very crucial facts that may be terrifying or beautiful, but very interesting facts about our universe. that you’d love to read about.
1. How Small is Our Home Planet?
Before we can truly grasp the gravity of the threats as well as the beauty that surrounds our planet, we must first realize just how small our planet is. The circumference of earth at equator is about 24874 miles, and from the north pole to the south pole it is about 24 860 miles. In the solar system we are the fourth largest planet. After us, we are dwarfed by Neptune, Saturn and Jupiter, and our own star which is 93 million miles away from us – the sun that has mass equivalent to 130 million earths.
2. How large are the stars larger than Sun?
The sun is a pretty big star, but it is nowhere the sizes of the other stars we know about. To name just a few larger stars for perspective, there is Eta Carine, that is over 5 million times larger than our sun, Betelgeuse – 300 times larger than Eta Carine (if it were our sun, it would reach as far out as Jupiter), and then there is UY Scuti – the largest star we know of. It’s mass is unknown. But before UY Scuti comes VY Canis Majoris – a star that is 5 billion times the size of our sun.
3. How Many Solar Systems Like Ours?
We are a part of the Milky Way galaxy. There are trillions of stars in our galaxy and nearly all of them are encircled by at least one planet. Within our Milky Way galaxy, we are not the only solar system. So far astronomers have found more than 500 solar systems and are discovering new ones every year. Scientists estimate that there may be tens of billions of solar systems in our galaxy alone.
4. One Galactic Year is equal to 200 Million Years
It takes our sun 200 Million years to complete an orbit of the Milky Way. Travelling out (zoom out) 150 thousand light years you can see just how small even the star like UY Scuti is within our Galaxy.
5. Our Galaxy is going to collide
2.5 million years away from our Milky Way is the Andromeda galaxy – our nearest neighbor, estimated to collide with our own galaxy in a few billion years.
7. To how far of the Universe do we know?
200 billion light years out is the cosmic microwave background radiation afterglow is what we believe that started us – the only thing estimated to be left of the big bang.
8. We Know Less 0.1 % of the Observable Universe
That is our universe, spread across 200 billion light years – as far as our Hubble telescope was able to see. What is beyond this? Other Universes? Immeasurable Heavens? We have discovered less than 0.1 percent and have found no other life. Are we all alone in this life, or we are not? The either thought is terrifying.
9. Are we the only ones alive?
For now all we know is that all injustices, political and religious theories, or truths, all loves sorrows, hopes, and dreams, extinct species like the Dinosaurs, and the species yet to come, past’s present’s and future’s thoughts and actions only exist on our small and insignificant planet alone.
10. Rogue planets may wipe out humans before any thing else
Rogue Planets are the loners of the universe – lost forever in space without a star to orbit.
When planets form, they react with each other gravitationally, and it is entirely possible that when our own solar system formed, planets were actually kicked out into interstellar space. There could be as many as 200 billion rogue planets in our galaxy. Means there are many rogue planets as there are stars in the sky and one of them could be heading our way.
11. Earth is moon’s mother, But who’s the father?
A collision with other planet sounds unlikely. Could this really happen?
As a matter of fact, it already has!
Four and a half million years ago, a young planet about the size of the mars collided with earth over 20,000 miles per hour (12 times the speed of a bullet). The impact destroyed the smaller planet. Earth survived but barely. Afterwards the entire earth’s surface was liquefied. Nothing but rock, lava, and fire was left everywhere – A true vision of absolute hell. Earth at that time had only an atmosphere of molten rock. Debris that was blasted out 20, 000 miles an hour began to orbit the earth. Gravity began to bring the debris together. And the result was our moon.
So that old dead ‘Rogue Planet’ is the father of Moon.
12. ‘Space debris’ is yet another horrible thing
Sooner or later human civilization must confront the very real asteroid and comet collision that exists within space and we will become extinct. Billions of rocky fragments, building blocks of a planet that never quite came together when the solar system was formed are out there everywhere ranging in sizes from rocks to pebbles to boulders and some the size of Mount Everest.
13. Jupiter is one reason of humans’ existence
The reason as to why we haven’t had any truly devastating catastrophes with asteroids within the past few million years is mostly because of Jupiter. Occasionally, Jupiter’s enormous Gravity draws in asteroids. Of course causing it to crash into another asteroid and be destroyed, or to wear away into another orbit.
It is no secret that a giant rock smashing into earth was what wiped out dinosaurs, and that particular rock was estimated to be only 6 miles wide. Jupiter is therefore one of the reasons life exists on earth. Did you know this fact before?
14. Space is not a very silent place
It’s a common misconception that there is no sound in space. Although space is a virtual vacuum, this doesn’t mean that sound does not exist there. Sound does exist as electromagnetic vibrations. There are especially designed instruments such as NASA’s Violator, Engine 1, IC-1 and Hawk Eye space probes that have used plasma wave antennas to record vibrations all within the ranges of human hearing. Listen to the sounds of our sun as well all of the other planets within our solar system. Venus and Saturn are the most weird.
15. A Mysterious Super Void in Our Universe
A particular large place in our universe is hollow. In 2004, astronomers discovered an empty section of space, in the southern area of the Galactic Hemisphere where our Milky Way solar system and the Andromeda solar system reside. And that empty space is missing around ten thousand galaxies.
Nicknamed ‘the cold spot’, this area is 1.8 billion light years across, and it is the largest known structure ever discovered in the universe. Scientists are baffled about what it is and why it is so barren.
16. We are doing the same error that our ancestors did
When the ancient looked into the night sky, they believed that the heavens revolved around the earth and mankind. But over the centuries this view has changed drastically. We eventually learnt about our solar system’s existence, and our Milky Way galaxy. Later we discovered that our universe is filled with other such galaxies. But it could be that we are committing the same error that our ancestors did by thinking that our universe contains everything that there is.
17. Infinite number of universes and worlds of Paranormals
The word multi verse refers to the general idea that our universe might not be unique at all, and there may be other universes out there that defy all our laws of nature. What is known as the entropic principle is the idea that our universe is fine tuned to allow humans to live. A small fiddle with strength of gravity for example, and life as we know it would not exist – a coincidence that doesn’t sit with the scientist.
The concept of a multi-verse neatly addresses this problem. With the infinite number of universes that could exist, we are simply living in the one that we are only able to, meaning that other universes depending upon their own laws of natures and physics could have very different biological life forms or maybe even paranormal entities.
18. The multiverse theory of identical universes
And there is this theory which is quite hard to put into words so I’ll just keep it short.
There are many universes, and everything is the same inside each one – meaning you exist on every single earth. However each outcome of your entire life is different. Whether you fail school or become topper of your class, the jobs you receive, the people you love or loose, and any decision you’ve ever made or chose not to make would have a different outcome throughout your life.
But unfortunately we are only one human, with only one outcome on this planet alone – meaning we could never actually prove the multi-verse theory to be true. Because no matter what, we are stuck with the outcome we are going to have on this version of the universe and the chances of one of those outcomes successfully proving this theory, unfortunately, are very remote
19. Supernova is how stars die
A supernova is a massive explosion generated by a dying star. A star in our galaxy goes supernova once in every 100 years. The explosion hurls matter into space and can shine as brightly as an entire galaxy for short periods.
Stars are giant nuclear reactors producing energy by fusing hydrogen into helium. Eventually however stars runs out of hydrogen to fuse. When this occurs, the stars began to fuse helium into heavier metals such as iron. The star’s core shrinks while its outer layer expands creating a red giant that consumes surrounding planets.
When a large star depletes its helium reserve, the core collapses within seconds causing temperatures in excess of 1 billion degrees Fahrenheit The outer layers of the stars collapse as well, only to explode outward in a massive explosion known as a supernova. What’s left of the star’s core becomes a dense neutron star and forms a black hole – an area of such densely packed matter that not even light escapes its gravitational pull.
20. But Supernova gives birth to new stars
After a supernova, material expelled in the explosion may form nebulae which are massive interstellar clouds of gases and dust. Over millions of years gravity pulls nebulae material together into a dense hardcore called a Protostar. A Protostar eventually become a new born star, and the new born star’s gravitational effects surrounding the nebulae material over time may form asteroids, comets, and even new planets.
It is truly the circle of solar life.
21. But Our Sun won’t go supernova
It takes a lot of fuel for fusion so that a supernova explosion could take place. Our sun has not enough mass to trigger a supernova. So, when sun run out of helium, fusion simply ends in small stars like our sun. The star becomes a white dwarf and slowly fades away. This is estimated to happen after 5 billion years from now. Don’t freak!
22. The Dark Flow
Sasha Cashlinsky, a NASA Astronomer, claims to have detected a bizarre pattern of movements in the heaven. He studied the movements of galaxies for over a year in order to find out if there is any subtle deviations. He found that all the galaxy clusters no matter where they were in the sky were all wearing off to one side of the universe. It was as if they were being pulled towards a mysterious attractor beyond the visible edge of the universe.
He called it dark flow.
What do you think it is, and where is it pulling us to?
23. All Galxies have a supermassive black hole at their center
In nearly every large galaxy, astronomers have found evidence of black holes millions and even billions of times the mass of the sun.
24. How a black hole is Formed?
Black holes form from what is left of the stars’ core after it has gone supernova. The collapsed core of a dead star implodes and its weight is enough to squash down all the atoms right down to their nuclei.
An ultra-dense amber called the ‘Neutron Star’. The density of a neutron star would be like taking a mountain and crushing it down with so much pressure into the size of a marble.
Neutrons can withstand incredible pressures, but if enough matter falls on to them beyond a critical threshold, they can be crushed down to nothing. When that happens, a black hole is born.
25. What is a black hole Technically?
A black-hole is gravity taken to the extreme. Its mass is literally packed into a point and enshrouded with inner dark sphere called the event horizon.
That sphere is the point of no return. Any gas, stars, planets, or even light that falls in disappears forever.
Albert Einstein said that gravity is not just the attractive force of planets or stars like the sun, it is a warping of space and time, which scientists call space-time with the presence of massive objects.
With the mass of a star squashed down to a deep point, a black hole is basically a deep puncture in space-time.
26. What if a black hole catches an astronaut?
If a future explorer prospecting for data tempted fate by travelling too close to a small black hole, they would be ripped to shreds immediately. However, a super-massive black-hole has more spread out gravity.
The ride would be much smoother. What you’d find if you made it inside is the most extreme destination in the entire universe.
27. How much do we know?
Honestly, not much. And won’t for a long time at least – a time that expands so much farther after our lifetime.
The real question is, can we figure out everything that there is to know before earth is destroyed by some random miraculous terrifyingly beautiful act of this thing that we call universe.
After reading this post, look up into the night sky, and allow yourself see more than you did before.
Do not feel small, insignificant, unimportant, or pointless. Instead, thank you eyes, your brain and your body, your own silent companion throughout your life for allowing you consciousness at such an extraordinary time period when you and your fellow man can study these mysteries that are so far away.
And whatever you believe in, don’t let this piece of text or others to ever discourage that belief – whether it be Gods, science alone, aliens, the paranormal, or nothing. Instead, combine the knowledge we do know of with your own beliefs and theories to see what depths of your own mind you can then explore.
We too as human beings are made of the same stuff of galaxies. May be we are not supposed to know. May be the true meaning of life while you have it is to simply give it some meaning!