theilleists
This is the only absolute truth, for each of us. I may be a brain in a vat being fed false stimuli. I may be in a grand computer simulation. I may be a resident of Plato’s Cave. Everything I believe or guess about the world around me may be an illusion. But I do know that I think, and therefore, in some sense, I am.
Some people have said they didn’t enjoy the second half of the book referenced here, Seveneves. I couldn’t disagree more. It’s a nice balance of setup and payoff, provided you go into it knowing that there’s going to be a huge time skip midway through, so you don’t get too attached to the individual characters.
But you have to understand, to 74 million people, the Fox News Cinematic Universe is reality. There’s regular bullshit, and then there’s bullshit so widely believed that you actually have to study the bullshit, just to be able to predict what its subscribers will do next. Like religion.
He’s always got le mot juste.
I agree that the idea of launching an object into the sun like an arrow or a bullet is not necessary. I have said so repeatedly. Also, the NASA scientists are correct. You must spend energy to change an orbit. They do not decay spontaneously. I’m happy you can take some comfort in the knowledge that, when the sun grows large enough to smash into the earth - not when the orbit destabilizes - you will in some sense have been correct. Wait long enough, and the sun will fall into you.
Please recall, the math guys that NASA hired agree with what I’m saying.
https://youtu.be/nSDFkQp-B7Y?feature=shared
Yes, I am saying that the stable orbit that the earth is in, and any number of alternative orbits, are easier to achieve than the extremely small number of possible orbits which intersect the surface of the sun. There are far more orbits that don’t touch it than orbits that do. To achieve the specific orbit which does touch it is still possible. You would accomplish it by accelerating to 108,000 km/h opposite of the earth’s current orbital velocity.
The word “eventually” carries a lot of your weight in this argument. Technically, eventually, the earth will fall into the surface of the sun. This will happen because the sun expands to become a red giant in 7.5 billion years. The earth will not need to change its orbit to touch the sun, because the sun will reach out to touch it.
https://en.wikipedia.org/wiki/Future_of_Earth
Until then, for the next 7.5 billion years, the orbit of earth and everything on it will remain stable unless acted upon by an outside force. An object in orbit is an object at rest, remaining at rest, following Newton’s first law. In its own inertial reference frame, “at rest” means continuing in its stable orbit. To do otherwise would require an equal and opposite reaction, i.e. propellant. This is not controversial.