Astronomers have just discovered a massive new planet that’s shaking up everything we know about space . This giant world is unlike anything we've seen before—its size, orbit, and unusual features have scientists stunned . Could this be the key to finding new types of planets or even alien life? In this Bright Side video, we break down the latest findings and what they could mean for the future of space exploration. Don’t miss out—join us for an epic journey through the stars! Animation is created by Bright Side. ---------------------------------------------------------------------------------------- Music from TheSoul Sound: https://thesoul-sound.com/
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00:00Look at this giant donut-shaped region far away from Earth, beyond the orbit of Neptune.
00:06We're talking about a distance of more than 2.5 billion miles.
00:10It's the Kuiper Belt, and something eerie and bizarre is happening there.
00:16Dwarf planets and other small objects dwelling there refuse to cluster together.
00:21Instead, they follow particular orbits, which is weird.
00:25The reason might be a large, mysterious planet hiding beyond Pluto.
00:30Its gravity might be messing up the orbits of those Kuiper space bodies.
00:37Hear me out.
00:39Our solar system is made up of the Sun and everything that goes around it because of the star's strong gravity.
00:45This includes the eight main planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
00:53There are also smaller things like moons, asteroids, and Pluto.
00:59For a long time, people thought Pluto was the ninth planet.
01:03But when it was reclassified as a dwarf planet, scientists started looking for a new planet X.
01:09Did they have a thing about odd numbers or what?
01:12And guess what?
01:14Some really think there might be a big, icy planet hiding far, far away beyond Neptune.
01:19This mystery planet is often called Planet 9.
01:25Now, Planet 9 hasn't been seen yet.
01:28But scientists think it might be out there because of some tiny, far away space rocks called etnos that move following bizarre, confusing paths.
01:37These paths seem to be grouped together and tilted in a way that doesn't happen by chance.
01:43This could mean there's a hidden planet pulling them into place with its gravity.
01:48If Planet 9 is real, it might be 5 to 10 times heavier than Earth.
01:53It would also be super far away, hundreds of times farther from the Sun than Earth is.
01:58Over the years, scientists have guessed different distances for its orbit, and the newest guess in 2025 says it could be about 290 times farther from the Sun than Earth.
02:11There are some cool ideas about where Planet 9 came from.
02:15It might have started as a big planet that Jupiter once kicked out of the inner solar system.
02:21Or it might have come from another star or even wandered around space on its own before getting caught by the Sun's gravity.
02:29Even though scientists have looked really hard using powerful telescopes, no one has actually seen Planet 9 yet.
02:36And so far, its existence is still just a theory.
02:40But recently, a group of researchers tried something clever.
02:44However, they used data from two special space surveys called ERAS and AKARI.
02:50These two looked at the sky in invisible light, far infrared, about 23 years apart.
02:57Which is helpful because Planet 9 is supposed to move very slowly.
03:02The team focused on a special list from AKARI, which is better at finding faint, moving things in space.
03:09They guessed how bright Planet 9 might be and how fast it might move based on how big, far away, and cold it could be.
03:19Then they looked for matching blips in the sky that were seen by both ERAS and AKARI, but not in the exact same spot.
03:27That's because a real planet would have moved a little over 23 years.
03:31And they indeed found 13 possible matches that could be Planet 9.
03:37Their estimations were based on how far away the object seemed to be, 500 to 700 times farther from the Sun than Earth,
03:45and how heavy it might be, which is 7 to 17 times Earth's mass.
03:50After looking very carefully at all the images, they narrowed it down to one really good candidate.
03:58The two detections weren't in the same spot in both surveys,
04:01and the way they appeared in the AKARI map matched what you'd expect from a slow-moving object.
04:07It showed up on one date and wasn't there six months earlier, but of course, there was a catch.
04:14Apparently, the old data isn't good enough to figure out the exact path of the potential planet.
04:19So, the team wants to do new follow-up observations using a special camera called DCAM,
04:26which is really good at spotting faint, moving objects.
04:30That way, they can find out if this candidate is really Planet 9.
04:35Additionally, it can help us learn more about how our solar system works and how it formed.
04:41If Planet 9 is ever discovered, it would totally change the way we understand our solar system.
04:47It could explain why some far-out space rocks in the Kuiper Belt tilt weirdly.
04:52The thing is, most planets go around the Sun in a flat-ish circle.
04:57But those far-away objects are tilted about 20 degrees.
05:01Planet 9 might be the reason why.
05:04Next, we'd probably find out why those tilted objects seem to point the same way.
05:09Their orbits are grouped together in one direction.
05:12A big, hidden planet's gravity could be hurting them like sheep.
05:18There are also some strange tilted objects super far away.
05:22They don't make sense unless something big, like Planet 9, is tugging on them.
05:27A few space rocks orbit the Sun backward between the big planets, which is kinda the wrong way.
05:33That's super weird unless something big is messing with them.
05:36Some far-out Kuiper Belt objects keep crossing Neptune's path and haven't been flung away.
05:43That's because Planet 9 might be helping keep their orbits stable over a long time.
05:50Another cool thing is that if Planet 9 existed, it would be a super-Earth,
05:55a kind of planet we see a lot around other stars, but we don't have in our solar system yet.
06:01So finding one here would make our solar system more like the others out there.
06:08Throughout history, people have been wondering if there could be hidden planets far beyond Neptune,
06:13even before Pluto was found.
06:18Back in 1880, a guy named George Forbes guessed there might be two unknown planets way out there,
06:25one about 100 times farther from the Sun than Earth, and the other about 300 times farther.
06:33He thought these mystery planets might be pulling on some comets and changing their orbits,
06:38kind of like how Jupiter does with the comets near it.
06:42In 2004, scientists found a weird little world called Sedna.
06:47It had a strange path around the Sun that didn't seem to be affected by any of the known planets.
06:52Its closest point to the Sun, called perihelion, is way too far for Neptune to be the reason.
07:00This made some scientists wonder if Sedna got pushed into its path by a hidden planet,
07:05maybe even something as big as Earth or bigger.
07:09Others thought maybe it was a star that flew by a long time ago,
07:13or another star that formed near ours.
07:17Then, in 2014, another odd object was discovered.
07:21It had a very similar orbit to Sedna,
07:24which made people even more suspicious that there could be something big out there messing with their paths.
07:31This kicked off a new round of the Planet X or Planet 9 hunt.
07:36At a meeting in 2012, a scientist named Rodney Gomez said that maybe there was a big,
07:42hidden planet around 1,500 times farther from the Sun than Earth.
07:46He thought it could explain the orbits of other odd objects,
07:51like some far-out comets and centaurs, small bodies that wander among the giant planets.
07:57At that time, those who supported the Planet 9 theory believed that if it existed,
08:02it would move around the Sun in a huge, stretched-out circle called an elliptical orbit.
08:07It would be about 400 to 800 times farther from the Sun than Earth is,
08:13about 13 to 26 times farther than Neptune.
08:17If it really had that kind of orbit,
08:19it would take around 10,000 to 20,000 years to go around the Sun just once.
08:25Plus, if it indeed orbited the Sun,
08:27it wouldn't follow the same flat path as the other planets.
08:31Its path would be tilted by about 15 degrees to 25 degrees.
08:35The farthest point in its orbit, called Aphelion,
08:39would be in the direction of the Taurus constellation.
08:42As for the closest point, it would point towards Serpens, Ophiuchus, or Libra.
08:48As for the composition of Planet 9, it would probably be a lot like Uranus or Neptune.
08:53It would have a thick atmosphere made of hydrogen and helium,
08:56and it would be super cold, negative 375 degrees Fahrenheit.
09:01Its core would be made of iron,
09:04and its middle layer would be full of rock and water ice.
09:07At the same time, if the planet was smaller and denser,
09:11then it might be more like Earth,
09:12with a rocky surface instead of a gassy one.
09:16According to a scientist named Mike Brown,
09:18if Planet 9 was real,
09:21a space probe would reach it in about 20 years
09:24if we used a powerful slingshot path around the Sun.
09:30That's it for today.
09:31So hey, if you pacified your curiosity,
09:33then give the video a like and share it with your friends.
09:36Or if you want more,
09:37just click on these videos and stay on the bright side.
