1. Complete silence in the universe.
Have you ever wonder what space sounds like? This is the most common question that people asked most to the astronauts returning to the earth. It turns out this never-ending expanse of star-studded blackness sounds just like it looks. It completely and adorably silences. Why? Because the sound needs to vibrate the molecules in the air to exist. But there is no air in the space, no air means any molecules, no molecules mean any sound. It was disturbingly quiet in the space that the human brain starts to panic the silence that you hear daily is nowhere near as quiet and complete emptiness. In your normal environment you are constantly exposed to atmospheric noise like bird chirping and car honking in the distance even if you don’t notice them your brain depends on those faints sounds to stay sane and present when all the noise disappears as it does in space, your brain has strange reaction, it starts searching any kind of sound to fill the silence. Some astronauts noticed amplified physiological noises like their heartbeat. In space, your body seems painfully loud almost like you're listening to your own heart through a stethoscope. But your heart isn’t beating any harder or any louder you just aren’t used to hearing your bodily functions so clearly, if you want to get a good idea about the silence that sound in space. Then you don’t require to spend your time and space, several labs in the U.S can block out 99.9% of all sound. But you must be careful because too much silence can drive you a little bit crazy.
2. An infinite starscape in the sky.
When you look up at the night sky, how many stars do you see? In the city, you might see if you hunt. In the mountains, you might look at an array of thousands but there are billions upon billions of stars in the galaxy alone scientist estimates the Milky Way galaxy contains between 100 and 400 billion stars. Most of them are too small or too far away for you to see with your naked eyes. That because our galaxy is over a hundred thousand light-years wide. Now to give you some perspective our entire solar system isn’t even one light-year across. It’s about 11.3 billion miles, which equals 0.0019 light-years. You could comfortably squeeze about the 52 million copies of our solar system into the Milky Way alone. Of course, the universe is much bigger than just our galaxy. The scientist hasn’t landed on an exact number but they estimate the universe contains upwards of 200 billion of the galaxy. Some over the times the size of the Milky Way and contains trillions of stars but we haven't explored the whole universe how could you possibly estimate the number of galaxies the universe has in it. This estimate comes from the Hubble telescope. It discovered evidence of a few thousand individual galaxies in one small section of the universe. We do know the universe or at least the observable universe is about 46 billion light-years across. So that meant around 200 billion galaxies and a nearly infinite number of the star. Try not to get attached to those numbers because the universe is expanding every single second. Stars are constantly growing and dying it’s almost impossible to know exactly how many exist but we do know one thing for sure, the sparkling stars that you see in the night sky don’t even begin to cover it.
3. Gobbling Galaxies.
The Milky Way is one of the largest members of the local group which houses the Andromeda galaxy and about 48 others. The Milky Way is around 12 billion years old and has significantly grown since its humble beginning. Most people don’t realize that the Milky Way has been slowly consuming smaller galaxies over the years. Right now our Galaxies are devouring two of its neighbors. It will gradually strip the gas from each of these dwarf galaxies until there's nothing left. Who knew natural selection affected the galactic system too.
4. Frozen Rings of Saturn.
Saturn is the best-known planet for its rings. It is the furthest planet you can see without a telescope. Galileo was the first to spot its rings in 1610. But it took some time to figure what its rings were made of. It turns out Saturn’s seven rings are thin layers of ice now when I say thin I mean 20 meters thick, that’s probably not thin by your standard but compare to the size of the planet t 20 m is like a piece of paper.
5. Galactic collision in the universe.
The Milky Way and Andromeda galaxies are about 2.5 million light-years apart that sounds incredibly far but Andromeda is so close that you can see it with your naked eye. And it’s only getting closer scientists discovered the Andromeda galaxies are moving toward us with about 110 kilometers per second that are over 240,000 miles per hour. Which is about the distance from the earth to the moon? Now whether we like it or not, these two massive galaxies are going to smash into each other. But don’t worry; this collision isn’t happening in your life or your kids or their kids. And romedaand the Milky Way won’t collide for another 4.5 billion years and even then it probably head- on galaxy shattering event if this was a car accident it would be more like clipping someone's headlight but when the stakes are this high a glancing blow can still have a catastrophic effect on a little slice of the universe.
6. The tilted planet in our solar system.
If you have ever seen a picture of Uranus, you probably thought it looks like any other blue ball. You may assume that it was right-side-up but recent research has discovered otherwise Uranus is tilted 98 degrees off of its orbital plane. In other words, it's sitting on its side a little tilting is common among planets in our solar system. Jupiter is a few degrees off Saturn is almost 30 even the earth is titled about 23 degrees. However, there is no planet, which is nearly sideways as Uranus. The scientist thinks the planet was struck by multiple other celestial bodies each collision not Uranus further off its axis. Its explanation has been revised over the years. So, it may change again but we do know this, if you want to look at the Uranus the right way then tilt your head 90 degrees, there you go to one side.
7. A year on Venus
As the planet gets closer and farther away from the sun, Solar times began to change but this isn’t like daylight savings you are not adding or losing an hour here and there on different planets, days and year scan be hundred times longer than they are on the earth. The length of a day depends on the amount of the time it is taken by the planet to rotate around its axis on earth that process takes 24 hours. But on Venus, t takes over 5800 hours that’s 240 times longer than one day on the earth. Venus’s days are so long that they last longer than an entire year. A year is how long it takes for a planet to complete its orbit around the Sun. This is where the positions of the planets in the solar system matter. On Venus, 1 year takes around 224 days or 5, 376 hours. That means a year is at least 424 hours shorter than a single day.
8. A year on Neptune.
What are the planets that are further away from the sun? Let’s jump to the other side of the solar system on the Neptune. A day is 16 hours long, which isn’t that much different from Mars. The biggest distinction is in the length of each year Neptune is so far from the Sun that a year equal to 165 years on earth. It means that Neptune’s orbit is about 165 times bigger than the earth. Neptune was discovered in 1846. Now that seems like a long time ago, since then it’s only been a single Neptunian year. So, what if we take things one step further it’s no longer recognized as a planet but we still no who long it takes for Pluto to makes its way around the Sun. One Plutonium year lasts a whole 248 earth years. Days and years are things, we rarely think twice about. But as humans begin expanding outside of Earth, your calendar may is one of the first things to go.
9. Mass Distribution in the solar system.
Our solar system is comprised of one-star eight planets, five dwarf planets and a whole bunch of moons. Yet if you put our whole solar system on the scale you would notice something kind of odd. The sun accounts for 99.8 % of the mass in our solar system. This giant ball of primarily hydrogen and helium weighs 330 thousand times more than the earth and it’s not even one of the biggest stars. Although it looks gigantic floating in the sky but the truth is our sun is about average at best.
10. The oldest footprints on the moon.
In 1969, Neil Armstrong, commander of the Apollo 11 walked on the moon. He and his pilot Buzz Aldrin were the first to leave footprints in the sand on the moon’s surface. It’s been decades since then but here’s something most people don’t know if you travel to the moon right now. Those footprints would look the same way they did in 1969. Lunar footsteps don’t disappear as they do on earth. Here a footstep left in the sand would be washed or blown away. If it somehow survives the elements it's bound to be smudged by another person casually passing through. But the moon doesn’t have an atmosphere. There are no wind and water to erode the surface and there certainly aren’t many random people walking around there. This means that those footprints made in 1969 look the same way for millions of years.