We’re flying past the planets of our Solar System. We pass by Mars, Jupiter, Saturn, Uranus, and Neptune. Then we move through dark space beyond the edge of our world. We’ve reached our destination. It’s the Oort cloud. It’s a hypothetical region around the Solar System that holds tons of asteroids and blocks of ice. It’s likely to be where the largest comet in human history was born. And now, it’s heading toward the Sun! Bernardinelli-Bernstein was discovered totally by accident during the Dark Energy Survey. Our telescopes were pointed at distant space. Their main goal was to learn more about how the Universe was expanding. Astronomers also wanted to make a more detailed map of the observable universe.Scientists analyzed over 80,000 images and found a moving object. It was alarmingly close to our home planet. Its size was an impressive 62[ml (100 km)] miles. That’s about the width of Lake Michigan. It was an already active comet with a long tail. Usually, comets get a tail when they come close to the Sun. The heat from the star warms the comet’s surface, and light materials, like ice, begin to evaporate. This forms a cloud of steam and dust that stretches far beyond the comet.
The good old Solar System is actually a pretty bizarre place, what with all its out-of-this-world phenomena that we, humans, haven’t managed to explain so far! There are rumors that a gigantic, undiscovered planet is hiding behind Neptune, volcanoes on Pluto spew ice, and a colossal canyon on Mars can accommodate the whole US territory! Well, let’s figure out if it’s true by talking about the most mystifying Solar System facts. The Solar System is 4.6 billion years old! So old — it’s a senior Solar System. Scientists came to this conclusion after they studied the oldest material they managed to get a hold of — and by that, I mean meteorites, of course.
Exciting news, everyone! The moon has a new little buddy — a mini-moon! But before you get too thrilled, know that this cosmic guest is just passing through. This pint-sized asteroid will be hanging out with us for about two months, until November 25, before it returns to its usual hangout — a cozy spot in the asteroid belt orbiting the sun. Let’s see how our tiny visitor’s stay might shake things up for us and our planet!
Exciting news, everyone! The moon has a new little buddy — a mini-moon! But before you get too thrilled, know that this cosmic guest is just passing through. This pint-sized asteroid will be hanging out with us for about two months, until November 25, before it returns to its usual hangout — a cozy spot in the asteroid belt orbiting the sun. Let’s see how our tiny visitor’s stay might shake things up for us and our planet!
Our universe is an endless expanse teeming with surprises waiting to be uncovered. From the mysterious depths of space to the intricate workings of subatomic particles, every corner of the cosmos holds unexpected wonders. Whether it’s the discovery of new celestial phenomena, the unveiling of cosmic mysteries, or the revelations in the microscopic realm, our universe continually challenges our understanding and opens doors to uncharted territories.
The sky often treats us to new wonders like meteor showers, intriguing planets, and captivating lunar eclipses. However, it’s not just about new arrivals in space — some things are saying their goodbyes and Saturn’s famous rings are on the way out. Scientists are closely monitoring this phenomenon.
You’re on a plane heading to an important astronomy convention when you see a large figure outside your window that eclipses the whole Sun. You spit out all of your coffee, and everyone in the plane stares outside in shock. You then notice that it has rings like Saturn. You were supposed to fly to Japan, but you’re forced to land in California.As soon as you land, you look up in the sky and see some more giant planet-like structures floating around in the sky. Everyone is taking pictures and trying to figure out what’s going on. Suddenly you notice a huge ball of fire crashing down near the airport. Everyone scrambles for safety, and luckily, it ends up in the middle of the runway with no one around. The bad news is that there’s no more runway for planes to land.
The sun is rising, lighting up the trees, swamps, and massive plants of the Yucatán Peninsula. It’s 66 million years before today — the last days of the Mesozoic era. This peaceful world doesn’t know yet that a rock the size of a mountain is nearing Earth at a speed of more than 40,000 mph [(64,000 kph)]. It looks like a fireball that’s growing larger and larger with every passing minute. Soon, it already seems to be bigger than the Sun. Dinos, roaming the prehistoric Earth, don’t know that they have to run, hide, save themselves! Not that it’s going to help.
This. Is. Earth... 335 million years ago. I wasn’t around then, but there’s just one supercontinent, Pangaea. See? Let’s watch it shift around in fast-forward. Ok here we go, it just split into two huge pieces! Australia goes this way, North and South America go that way. Africa, Asia, Europe, forming, forming... and there we go, the planet as it is today. Let’s keep going, I mean, the continents are always on the move! Over time, some of them will crash into each other, others will break apart. But that’ll take about 100 million years! Better put it on super fast-forward! 100 years from now. Humans keep spitting carbon dioxide into the atmosphere, and the planet’s already warmed up a bunch. The world’s ocean levels have risen about 4 feet. The Bahamas? They’ve totally disappeared! 200 years from now. The Earth’s population is about 19 billion people. The climate’s gotten even warmer, we’re packed in like sardines over here! New medical tech makes it possible to live to 180! But why? Fossil fuel reserves of oil and gas... long gone. Oh, and the continents have drifted over 16 feet!
You take off from Earth and park your spacecraft somewhere near the Moon. You’re now almost 240,000 miles away from your home planet. That’s almost 100 widths of the United States. Now, you take out a giant hammer and an enormous chisel using the robotic arms of your spaceship. You place the chisel at the Earth’s North Pole and strike its head with the hammer. Earth splits open like an eggshell, and you see it... Another planet.It’s Theia. And it’s hiding inside our planet like a yolk in an egg. You’d need to go back in time 4.5 billion years to find out how it got there. This beautiful nebula will soon become our Solar System. Colored dust and various space debris are slowly coming closer toward the common center. Soon this jigsaw puzzle of debris becomes too heavy and dense. The temperature inside the giant is rising. Soon, it gets so high that it triggers a nuclear chain reaction.
BOOM! An explosion of supersonic waves, interplanetary heat, dust, fumes... The Earth’s atmosphere has been invaded by a cosmic rock the size of Everest! A few seconds ago, this rock, weighing trillions of tons, was hurtling towards Earth. It could fly from New York to Anchorage faster than you could fry yourself an omelet! This monster’s name? The Chicxulub incident. Epic name, right!66 million years ago, it crashed into the Earth. Back then, dinosaurs ruled the planet. But not for long! The epic collision took place in modern Mexico, in the Yucatán Peninsula, right near Cancun, where the dinosaurs were vacationing! Well probably not. Still, the huge space rock hit the ocean, but even all that water couldn’t stop the inevitable.The collision caused a huge amount of energy to be released. The horror on a planetary scale had begun! Imagine a mini sun lighting up the surface of the Earth, with tsunamis the height of the Statue of Liberty bursting from the epicenter of the watery impact. Hmm. Not good.
People stop their cars on the highway, get out of them, and lift their heads in wonder. In the cities, everyone takes to the streets. Balconies and rooftops of houses are full of people staring at the Moon in shock. It’s red. Some people scream that it’s the end of the world; some seek shelter. Indeed, the usual white Moon now looks like it has been doused in red paint. There’s no need to be afraid if you see such a thing. On the contrary, enjoy the view, because you have witnessed a rare astronomical phenomenon. This is a total lunar eclipse.
Is it possible to “put out” the Sun? For example, what would happen if we poured all of Earth’s oceans on it — or even more water? Well, let’s find out. The Universe is a place full of mysteries. Since ancient times, scientists have been arguing about how space works. But none of us has ever doubted the existence of one thing — the Sun. Ah, the center of our Solar system. It’s big, bright, and... immortal? Nah, not really. Actually, the Sun is just an ordinary star. It consists of 75% hydrogen, a little helium, and a pinch of other heavy elements. Gravity holds it all together. But in around 5 billion years, the life cycle of the Sun will come to an end. The hydrogen inside it will run out. Our star will begin to grow gradually. And you can’t even imagine just how BIG it will become!
I hope you feel well-rested. Because I’ve got a tough task for you. Don’t worry — it’s fun! You’re going to visit different planets of our Solar System and try to run on each of them! Let’s figure out where you can run the fastest and where you can barely walk! The fastest man on Earth, Usain Bolt, can run with an average speed of about 23 miles per hour. But his top speed is higher — up to 27 miles per hour! Sadly, we can’t all be Usain Bolts. The average person runs at a speed of 6 to 8 mph. But maybe, there’s a planet out there where you can beat the famous Jamaican sprinter’s records? But first things first, what will affect your speed when you run on other planets? For one thing, gravity. Depending on how strong it is on the planet you visit, it’ll influence your weight. And in most cases, the heavier you are, the more slowly you run.
Among all the planets of the Solar System, our Earth is unique since it’s the only one that has developed life. But what if we got a competitor? What if a second Earth appeared out of nowhere? Then there would be two different scenarios. The first is the destruction of both planets. The second has an unexpected but pretty logical ending. But let’s start with the catastrophic scenario. The second Earth with the same conditions could exist only if it received absolutely the same amount of sunlight as our planet. The orbit that our Earth follows is perfect for getting the necessary amount of solar heat. If we were a little further away, the entire surface of our planet would resemble Antarctica. And if Earth was a little closer to the Sun, we’d all live in a huge desert inhabited by very few living beings. So, for the second Earth to be identical to ours, it’d need to follow the orbit of our planet.
Jupiter is the largest planet in the Solar System. More than 1,300 Earths could fit inside this gas giant. It’s also two and a half times more massive than all the other planets of the Solar System — combined! But if you think this is mind-boggling, I’ve got some great news for you! Very recently, a team of astronomers has discovered a much, much bigger planet with the help of the Subaru Telescope and the NASA Hubble Space Telescope.It’s a Jupiter-like protoplanet orbiting a very young star called AB Aurigae. The star is probably still forming and is no more than 5 million years old. For comparison, our Sun is 4.6 billion years old. The young star is located around 531 light-years away from Earth in the constellation of Auriga.
Black holes. The most terrifying, mysterious, and fascinating objects in the Universe. Eternally hungry, they eat everything in their path and are constantly expanding. But how small and how big can a black hole be? Let’s find out. It’s not very easy for a black hole to be born. Most often they’re just a result of a massive star ending its life cycle. If you take a star and squeeze it very, very hard, at some point it cannot withstand the pressure anymore. So it collapses and turns into a black hole.
Let’s face it: as stars go, our Sun is actually, well ... pretty boring. C’mon, there’s nothing unusual about it. There are millions of similar yellow dwarfs in the universe. And yet we love it. After all, it’s the only star we have, and it gives us life. However... it wasn’t always like that. Once upon a time, the Sun had a twin... possibly an evil one! What happened to it? Well, let’s find out. This here is a giant molecular cloud. They’re also sometimes called dark nebulae. Here, there are many interstellar clumps full of gas, dust, and piles of stars. These clouds have no clear boundaries and often take weird crazy forms. You can even see some of them with the naked eye. Look at the clear sky at night — they look like dark spots all across the bright Milky Way.
Let’s pretend that humanity faces a huge threat from outer space. We’ll imagine that a giant planet-eating octopus comes to our solar system to eat Venus, Mars, Earth, Jupiter, and other planets, except Saturn. Therefore, people decide to move to the big planet with giant rings. Fortunately, they already have cool technologies that allow them to make such trips. So, we quickly get into giant ships, take off, and fly to Saturn. Life on the planet itself is impossible because it has no solid ground. The ship won’t be able to land there. This is a giant gas ball that is 9 times wider than Earth.
Aaah, well-deserved vacay, finally! This time you’re off to see something new, it’s an ocean on one of the Uranus’ moons! Alright, just kidding — this destination is not a vacation spot yet. But yeah, there are definitely some impressive oceans out there. Hey, don’t say you thought oceans can only be found on Earth!
What comes to your mind when you hear the words “green monster”? Hulk? Shrek? Probably. cBut definitely not a young supernova in the Milky Way galaxy — oh, and if you have forgotten what our home galaxy looks like, here, have a look! So, anyway, is that supernova indeed green and — you know — scary? Not really. But let’s start from the very beginning. Cassiopeia A (aka Cas A) is the remnants of a stellar explosion astronomers spotted in the sky 340 years ago. This supernova is 11,000 light years away from us in the constellation Cassiopeia, and its remnants span about 10 light years. Recently, scientists have managed to capture the sharpest image of these leftovers yet — all thanks to the James Webb Space Telescope, the largest optical telescope in space.
Now, as much as we love epic space battles with blasters cutting through the black void and causing cheerful booms, that’s not exactly what happens when something explodes in the big black. Space is basically a vacuum, meaning it has no oxygen. And oxygen is an essential part of any process of burning we have here on Earth. You might argue that stars can burn and explode into supernovae, but that’s not exactly true either.
There are a lot of space objects all around the Universe, from stars to planets, to satellites, comets, and asteroids. But our closest celestial body is the Moon, which has been subject to much research, theories, and even myths. As our only natural and permanent satellite, the Moon is in the top ten list of biggest satellites in our Solar System.
The large ball of fire thousands of miles away from us is the brightest object in our Solar System, as well as the biggest. If Jupiter was the size of a basketball, then the Earth would be a tiny little grape. But the Sun makes even Jupiter look like a joke. That big burning ball in the sky is made up of hydrogen and helium and is 864,000 miles in diameter, making it more than 100 times wider than our little blue planet. It’s 10,000 degrees Fahrenheit just on the surface and 27 million degrees at the core.
Hey, space buffs! Just how well do you know our Solar System? Guess the planet: it’s more than twice as massive as all the other planets combined. It’s covered with striking swirls and stripes — which are actually windy clouds of cold ammonia and water, floating in an atmosphere of hydrogen and helium. Still no clue? Then look at this! It’s the infamous Great Red Spot — a giant storm larger than our home planet that has been raging for hundreds of years. Right you are! This cloudy world is Jupiter! And the main question is, “Is this planet our enemy or friend?” NASA’s Juno orbiter is exploring this gas giant at the moment, sending us tons of useful data. Jupiter is so big that 11 Earths could fit across its equator. If our planet was the size of a grape, Jupiter would be a basketball! The gas giant is the fifth planet from the Sun, orbiting around 484 million miles away.
Our Sun. Something strange just happened now. Every TV channel, the news, they’re all talking about a black hole that came closer to us — on the spot where our Sun used to be! You can even see an accretion disk, and the background of the sky looks kinda distorted, which means it got really close.Normally, black holes are so far away that we can’t see them with the unaided eye. You can’t even see them with a telescope directly! What is it doing here, so close? Where is the Sun? Did the black hole swallow it?
Ahh, Earth... the third rock from the Sun. The blue planet. You get it. Its atmosphere is made up of around 78% nitrogen, 21% oxygen, and 1% argon, water vapor, and carbon dioxide, a nice balance for any living creature to breathe. The weather here is also perfect for life to exist, unlike in places like Saturn, Mercury, or any other celestial object in our Solar System — we have the troposphere to thank for that. It’s the densest part of the atmosphere on our planet and is 5 to 9 miles thick. It’s the layer of the atmosphere that always affects our weather and secures the right conditions for life to exist and to have bodies of water.
Have you ever wondered what it would be like if every planet in our solar system was the size of Earth? Well, it’s time to dive into this mind-boggling scenario! Let’s imagine what each planet would look like if they were as big as our beloved blue planet. Would the barren, red landscape of Mars suddenly become a lush green oasis? Would the massive, swirling gas giant Jupiter just disappear? And how would it affect our solar system as a whole — are we all doomed? Buckle up and let’s find out.
You’re on a spaceship flying through outer space at a speed of 180,000 miles per second. This is almost the speed of light. Make yourself comfortable, because the voyage is gonna be long. It will last a little more than 90 years. It’s better to use a cryo capsule to not get bored. In short, you need to fly for almost a century at the speed of light to get to a mysterious exoplanet that scientists have recently discovered.
It’s becoming colder by the minute. The temperature drops below zero very quickly, and although there’s no snow, the cold is becoming unbearable. Hoarfrost appears on the ground, the grass and the trees, and ice forms on bodies of water at an incredible rate. Shivering people all over the planet raise their eyes to the sky, and their jaws drop in disbelief: the Sun has become twice as small as it used to be. It now looks like a distant speck, and it won’t be able to heat the Earth any longer. But the worst thing is, there’s a huge, blazing rock coming right at the horrified spectators from the sky, and the impact with that thing will undoubtedly do a lot of damage.
The Moon. Our little companion. Our only friend in the big, dark, cold space. It’s not surprising that any events related to it, like solar or lunar eclipses, excite us. But how about... the black Moon? The blue Moon? A supermoon? Have you ever heard of them? Well, let me tell you about it and how you can observe them. Let’s get your calendars ready. The distance between the Earth and the Moon is 238,900 miles. Feels not so far, doesn’t it? But trust me — most people GREATLY underestimate this distance! Did you know that every planet in the Solar System, including Jupiter and Saturn, would fit between the Moon and us? I couldn’t believe it myself!
Now, what would Earth look like if it was the only planet in the Solar System? Or what would happen to our planet if the Moon went missing? Or what if dinosaurs had never gone extinct? We’ve all heard the story: over 66 million years ago, a big asteroid hit Earth. Almost 75% of creatures that roamed the planet at that time were wiped out in mass extinction. Amongst them, dinosaurs. Tyrannosaurus, Triceratops, Velociraptor... All gone. But because of that, we’re all alive! According to science, the human race was developing more safely without these gigantic creatures hunting us. But what if that asteroid had crashed to the ground a few miles away from the place where it fell? What would the world be like today? Imagine walking down the street to your local supermarket and coming across a truck-sized T. rex. Could that ever happen in this alternate universe we’re talking about?
It’s hard not to wonder if there’s another form of life out there in the Universe when you look at the night sky. There’s this thing called Fermi Paradox. It basically says this: if civilizations that might live somewhere out there in the Universe are so common, why haven’t we found any signs of them? We’ve looked really hard, but we haven’t stumbled over any proof there are other forms of life somewhere in space. And we suspect there could be many civilizations because scientists have calculated there are possibly billions of habitable planets in our galaxy alone. So it would seem reasonable to assume that some of these planets could have developed intelligent life, possibly even civilizations that are more advanced than ours. So, Fermi Paradox basically asks, “Where’s the party? How come we weren’t invited?” And one of the potential answers to why we haven’t found any other form of life in the Universe is something called the Great Filter theory.
So, Mars has two moons — Phobos and Deimos. And, apart from the bizarre shape, there’s nothing remarkable about them... Except for one thing. Not so long ago, scientists discovered a strange phenomenon on the surface of Phobos. And they still can’t find any explanation for it. What is this phenomenon? And what does it tell us about the history of our Solar System? Let’s find out. American astronomer Asaph Hall discovered Phobos and Deimos back in 1877. Do you know that all the planets in our Solar System are named after Greek and Roman deities? For example, Mars, or Ares, is the famous deity of war. That’s why the satellites of this red planet were named after the sons of Ares — Phobos and Deimos.
In the vast expanse of the universe, there are planets unlike any we’ve seen before — planets with a treasure trove of diamonds. What mysteries do these sparkling worlds hold? What do they look like? And most importantly, just how much would it all cost?! Let’s find out. First of all, let’s take a look at diamonds in general. We see them as rare and valuable gems. But did you know that they actually come from something as ordinary as carbon? That’s right! This is the same element that’s found in your pencil lead, or coal.
It’s dark outside — almost 2 AM. You go outside and look at the sky. And here it is — bright, full Moon. You might think you know a lot about Earth’s natural satellite, but let me ask you this, “How did it form?” The answer is “nobody knows”! But, of course, there are theories. The most popular one, called “the giant-impact theory,” claims that the Moon formed during a collision between Earth and another planet. This planet must have been smaller than ours, the size of Mars. And the collision itself probably happened around 4.5 billion years ago.
