Image source: 163
Have you read science fiction, of course I think you have read it, have you read a story about another planet that is the size of Earth, orbiting the other side of the solar system, and is blocked by Earth. Could it be possible that it actually exists there?
No, no, no, no, no, it must not be possible.
Image source: baidu
This is a very popular theme in science fiction. There is a mysterious planet that orbits the sun at the same distance as Earth, but it is on the other side of our solar system, always blocked by the sun. We have no idea that they know we are here, and that they are organizing their fleet to invade our planet. We need to seize the opportunity to invade that "anti-Earth" before they attack us, steal our water, eat all our cheese, or kidnap our dear Neige La lawson and Alton Brown to force them to be the culinary queen and cooking king of the "other earth.".
So, will these happen? Is there really another planet orbiting in a stable orbit, hiding behind the sun? The answer, perhaps, as you suspect, is no. No, no, no, it must not be possible.
In fact, that's not entirely true. If a powerful and mysterious spaghetti is magically created into another planet and thrown into orbit, it will be briefly hidden from our field of vision because of the sun. There are also many other planets orbiting the sun. As the Earth orbits the Sun, it is subject to subtle influences from other planets, accelerating or slowing down in its own orbit.
So when our Earth is pulled further afield by Jupiter in its own orbit, other planets opposite the Sun may do the same. Year after year, these various sports movements intensify, and as Earth chases other planets in orbit, they may be easily seen in the sky.
Eventually, our orbits will intersect, so there will be an encounter. If we're lucky enough, the planets miss each other and are kicked into a new, safer and more stable orbit around the sun. If we weren't that lucky, they would collide with each other to form a new super-large Earth, and it was clear that everything on both planets would be destroyed.
Illustration: A diagram of five Lagrangian points associated with the Sun-Earth system, showing the Deep Space Climate Observatory rotating around the first Lagrange point. The image is not scaled proportionally. Source: NASA/Wilkinson Anisotropic Probe Research Team
What would have happened if there were two halves of the Earth in the very beginning, and these two halves collided to produce the current Earth! Or did you start with four earths, each with its own inhabitants on top of it? Then there was a bang to create a big earth! It may also be that 64 Earths are transforming and converging to form a super-large Earth.
Illustration: Two-dimensional effective potential energy map, the more red /purple potential energy is higher, the more blue /white potential energy is lower, the general potential energy high is like the potential energy low, it is easy to fall to the potential energy low. Image source 360doc
Now, I'm going to make things worse now and flesh out your imagination with some practical science. There are many locations where celestial bodies can share the same stable orbit. These positions are called Lagrange points, and the gravity of the two objects creates a stable position for the third-party object. Among them, the best of these are the fourth and fifth Lagrange points. The fourth Lagrange point is located at 60 degrees from the planet in its orbit, and the fifth Lagrangian point is located at 60 degrees below the planet in its orbit.
Image source 360doc
Relative to a planet, a body small enough can persist for billions of years in a stable position. Jupiter's fourth and fifth Lagrange points in its orbit boast a number of Trojan asteroids that always remain at a stable distance from Jupiter. That means that if you have a gas giant large enough, you can have a smaller Earth world in a stable orbit 60 degrees from Earth.
Illustration: The grumpy cat has the right answer. Image source: grumpycat
Well, that's a pretty clever idea. Unfortunately, gravity makes the idea of this hidden planet completely impossible. Most importantly, if someone tells you there's a hidden plane there on the other side of the sun.
Resources
1. Wikipedia Encyclopedia
2. Astronomical terms
3. universetoday-257248Freyja
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