The planets do emit sound, in the sense that you can translate the EM signals and radio wave emissions into a range that we can process.

Here is what earth’s electromagnet signal sounds like.

Here is a sample of all the planets.

Several scientists have even released albums where they did so. Like Voyager

The universe is essentially infinite, but I'd argue that's not enough for the chances of two identical mass and size bodies to form right beside each other and have a stable binary gravitational influence WHILE orbiting a star.

They would most likely collide(possibly like how proto earth collided with a similar proto planet which ejected the material that became the moon).

The problem is as they neutrally orbit each other, one would be closer to the star and feel a stronger gravitational tug, while the other planet would be pulling against(which would be in constant flux due to their changing position to each other relative to the star) and quickly lose stability

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Like the Pluto-Charon system

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Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

|Fewer Letters|More Letters| |-------|---------|---| |JWST|James Webb infra-red Space Telescope| |L1|Lagrange Point 1 of a two-body system, between the bodies| |L2|Lagrange Point 2 (Sixty Symbols video explanation)| | |Paywalled section of the NasaSpaceFlight forum| |L3|Lagrange Point 3 of a two-body system, opposite L2| |L4|"Trojan" Lagrange Point 4 of a two-body system, 60 degrees ahead of the smaller body| |L5|"Trojan" Lagrange Point 5 of a two-body system, 60 degrees behind the smaller body|

^(6 acronyms in this thread; )^(the most compressed thread commented on today)^( has 11 acronyms.)
^([Thread #8450 for this sub, first seen 19th Jan 2023, 06:15]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])

That's not necessarily possible though. The Moon is tidally locked to the Earth because its smaller by a large margin. The Earth would eventually tidally lock to the Moon as well, but our Sun will destroy both the Earth and Moon long before that ever happens.

Two similarly sized bodies would take longer to lock to one another than the Moon did to the Earth, but less time than it'd take the Earth to lock to the Moon. I've no idea how long that'd actually take though, or if it'd be within the lifespan of the average star similar to the Sun.

No, the planets would probably end up orbiting each other or colliding. Lagrange points are stable for things like satellites because their masses are insignificant compared to the Sun and Earth. If an Earth-sized planet was at one of the Lagrange points(mostly L1 and L2, I’m not sure about L3-5), the planets would be attracted to each other much more than to the sun.

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No Lagrange points only work because the mass is negligible at them

Edit Lagrange are stable because they don’t impact forces on the other two bodies when you account for rounding errors

Well, to be honest, all satellites and their planets orbit each other. In most cases the center of mass of the system is inside the planet because it’s very much more massive than the moon. In the case of Pluto and Charon, the difference in mass isn’t that great so you can tell that they’re orbiting around a point that isn’t entered on the planet’s center.

2 planets in the same orbit would collide with each other in some amount of time depending on the other objects in the system, their masses and distances from the pair.

These other planets pull on the pair in differing strengths and cause one to speed up and the other to slow down. Eventually they collide and become one body.

This may help clear it up a little for you.

https://astronomy.stackexchange.com/questions/22638/a-tidally-locked-double-planet

I just didn't understand your edited comments.

The inverse square law proposed by Newton suggests that the force of gravity acting between any two objects is inversely proportional to the square of the separation distance between the object's centers.

So it is not as simple as the moon is tidally locked to earth, so, therefore, two earth sized planet could be tidally locked

I misplaced the decimal by orders of magnitude. Pathetic.

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>By about .25 seconds per century.

By about 0.002 seconds per century.

I knew that they were tidally locked to each other but I had no idea that they can sometimes share an atmosphere.

Planets yes. Earth like worlds no. Our own ELW is fine tuned to a fault. It follows that other ELWs would have a similar moon, gravitational forces, axial tilt etc.

Similar question, if there was another Earth sized planet in our (therefore each other's) langrange point, would that be stable?

I think so, i've even simulated it a few times, but I think it's more stable if one of the bodies is significantly smaller

Tidal locking happens when extreme gravity differences cause the objects to slow down. The steeper the gravity quotient, the faster the tudal locking occurs. The moon is relatively small compared to the Earth so it stopped first (relatively) but as it recedes, the earth slows too. Meaning our days are getting longer. By about .25 seconds per century.

I mean I did edit it saying I'm wrong? Shits and giggles. I'd rather leave my correction that I'm wrong than just delete. And my glasses are not on lol don't get old can't see shit.