More than 60 years of space exploration and still we get amazed by universe facts because of continuous improvement and advancements in the space research.
Our Universe is unscaled. neither its beginning nor end is unknown. And we humans are just a small part of this Universe. And our scientists are still exploring the different aspects of our universe.
In this post, we will be talking about 15 mind-blowing facts about the universe.
15 mind-blowing Universe facts that will surely amaze you
How old is our universe?
Our universe was formed around 13.8 million years ago during an event called the Big-Bang. Big-bang theory suggests that our universe is expanding, that means 13.8 million years ago, everything was concentrated at a point in the space.
The Big Bang is said to be the beginning of the Universe
In the beginning, there were just particles mixed with light and energy concentrated in a confined space. Then they began to expand and began to cool down.
Those tiny particles grouped together to form atoms and molecules. Then those atoms and molecules grouped further on a larger extent to form stars and galaxies.
Crashing of galaxies and stars lead to the formation of planets and asteroids. This theory of the continuous expansion of the universe is called the Big Bang Theory.
Light Year is the unit to measure the distance in the Space
Unlike it sounds, The Light year is the unit to measure distance. It is the distance traveled by the light in one year. That being said, the closest star to earth after the sun is Proxima Centaur which is 4.24 light-years away.
That means, the light emitted from it takes 4.24 years to reach earth.
The Sun is revolving around the center of our Galaxy
Yes, you heard it right. Similar to the planets in our solar system that revolve around the Sun, the Sun too revolve around the center of our galaxy, the Milky Way.
So, we can say that the planets in our solar system are revolving around the Sun and the Milky Way at the same time.
It takes 230 million years for the Sun to complete one revolution. The last time the Sun was at its current position was the era of dinosaurs.
There are about 100 billion galaxies in our Universe. They are broadly divided into 4 main categories, spiral, barred spiral, elliptical, and irregular. Our galaxy, the Milky Way is a barred spiral galaxy.
What about the number of stars?
There are about 400 billion stars in our galaxy alone and our Sun is one of them.
Taking about total stars in the universe, there are about 100 billion galaxies in our observable space, and each galaxy has about 100 billion stars on an average. So the total comes out to be 10000000000000000000000 stars!!
The closest galaxy to our Milky Way is the Canis Major Dwarf Galaxy, which is 42,000 light years away.
The closest spiral galaxy to us the Andromeda galaxy is 2.5 million light years, Not too close right?
Planets with rings
There are 4 planets in our solar system that have rings around it. They are Jupiter, Saturn, Uranus, and Neptune. The rings of Saturn is the most magnificent and bright. Jupiter’s ring is dark and thin and invisible from the Earth.
Sun rays take 8 minutes to reach Earth
The rays of the sun travel at the speed of light and take around 8 minutes and 20 seconds to reach the earth surface.
here is the table of estimate time it takes for sunlight to reach other planets in our solar system:
The mass of the universe
Only 25% of the weight of the universe is estimated till date. The remaining 75% of the mass is made up of material that the scientist directly observe. This ‘undetermined’ mass that contributes the most is termed as ‘the Black matter’.
You see the past of a star
Stars are very far away from us. So far that the light emitted by them takes years before reaching to us.
For example, the star Vega is 25 light years away. That means the light you see at night when you gaze at Vega has actually left the star 25 years ago. Isn’t that interesting.
The collision of Andromeda and Galaxy way
The Andromeda galaxy is moving towards our galaxy with a speed of 110 kilometers per second. It is likely to collide with our galaxy in 4 billion years.
There is alcohol up there!!
26000 light years away from earth, Sagittarius B is a huge molecular cloud of dust and gas floating near the center of the Galaxy way and contains 10-billion-billion-billion liters of alcohol! Being an organic molecule, the vinyl alcohol present on it gives us some clues about how life forming substances are produced
Man-made objects outside the solar system
There are just 5 man-made objects to leave the solar system and reach interstellar space
- pioneer 10- Launched in 1972.
- pioneer 11 Launched in 1973. Lost contact in 1995. It flew past Jupiter in 1974.
- Voyager 2: It was launched in August 1977. It flew past Jupiter and Uranus in the year 1979 and 1981 respectively. Voyager is still active and in contact with us.
- Voyager 1: Launched just a month after Voyager 2 in September 1977, it flew past Jupiter in years 1979 and Saturn in 1980. It flew closer to the moon of the Saturn, Titan and gave us a better peek at it. The probe is still active.
- New Horizons: Another probe launched in 2006 which passed Pluto in July 2015. It is moving towards the Kuiper belt, in the outer portion of our solar system.
The diameter of our Galaxy
Our Galaxy, the Milky Way has a diameter of 105,700 light years. Our earth is about 2500 light year from the center Milky Way.
These were some amazing facts about the Universe. Did you like these universe facts? Do tell your opinion on the comment section. We will keep updating the list of universe facts in this post to stay tuned.
And to get the latest facts like these right into your inbox, do subscribe to the newsletter.