Making up strawmen after being proven wrong over and over again. Absolutely incredible. And I never once mentioned anything about war or wanting war in any of my original comments.

And that's rich coming from someone who can't even get basic facts in their comments right.

Tell that to Sparkie and Ralphie from the inaugural launch.

Ok then, have fun war mongering. You seem happy to war monger and wish to continue to war monger. I'd wish normal people peace but you're all too happy to fund new ways to kill each other by repeating and repeating the mistakes (sorry that's my opinion, you're probably seeing them as successes) of the past.

But, you know you can't get normal people on board with it unless you lie about the past and of course lie about the future.

Good afternoon.

The source for that information I believe is the answer to my question then. I will watch these videos also as well to see if that provides any more clarity.

All uk government funded research (UKRI) needs to be open access already. Its a change in business model from universities buying packages of journal subscriptions to universities paying for their staff’s publications. I’m sure the journals are making more money this way.

Both ways the authors, reviewers, and editors get nothing. Its disgusting. Its an abusive relationship. Its a system our careers and aspirations depend on.

We look at things and infer from that our movement to it

What is a DPhil and how is it different to a PhD?

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Not a astrophysist at all but Given that we know the velocity of the solar system roughly* and the have a good estement for the mass of the milky way we can do fancy orbital mechanics math to plot the orbit.

Simmilar to pluto since it has not completed an orbit since its discovery in the 1930s, yet we still know it orbits the sun

What can you do with a masters in astronomy?

The Sun is 99.98% of the mass of the Solar System. Sun's overwhelming mass compared to the other planets controls their orbits.

Sag A" is only 0.003% of the mass of the Milky Way Galaxy.

• Sag A* has a puny 4 million solar masses.

• Milky Way Galaxy has 200 billion stars plus a much greater mass of Dark Matter, together totalling 1.2 to 1.9 trillion solar masses.

• 4 million vs over 1.2 trillion solar masses. The stars and the Dark Matter should have a much greater control of the Sun's orbit. And prevents the Sun from flying away.

Thank you but that does not answer how we know that it orbits the barycenter.

Sag A* is a flea-speck in the context of the mass of the Milky Way galaxy, or even the mass of its core region. The solar system does not explicitly orbit SagA*. It orbits the barycenter of the entire galaxy.

I think it’s always a good idea to start with the basic principle that our planet, or sun, our solar system is nothing special. That is, our solar system won’t be doing anything different than the others, and given the configuration of the Milky Way arms, these stars (and their planets) are not getting “flung out”. So we wouldn’t either. Our solar system is too gravitationally bound to not just SagA, but all the mass, including dark matter, holding us together.

By that same logic, we have to assume the Milky Way, which has very old stars itself, isn’t special than most spiral galaxies we see. It’s bigger than average, yes, but within normal. And those distant galaxies we see are not ejecting their stars either. The galactic escape velocity is very high.

In fact, I bet astronomers have already calculated the mass of the Milky Way, it’s escape velocity, and the speed at which our star and solar system move through it. I think we’re safe.

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How many people apply to be astronauts and end up as astronauts? how unlikely is it?

This PBS SpaceTime video may interest you

It's a LOT more complicated than a simple ellipse. Recently PBS Space Time did an explainer video on how the earth (and solar system) moves through the galaxy... It's bloody fascinating and quite complex. There wasn't as much info on how we know it, but there's some explanations that make sense to me, especaially with the diagrams they use.

Trust Kepler, and devote your energy to more immediate and productive thoughts.

exactly, the scientists are the ones doing all the work, people need to learn how to view spaceX and musk as 2 separate entities, it’s like supporting the soviet leaders because they had a space program that contributed greatly to developments in space flight.

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Yes, lots of engineers and scientists had their hands in it, but it takes a leader to make it happen. That leader is Musk.

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Investors don't sleep in the factory trying to fix/improve production issues, Investors can't deep dive into how their rocket engines work and make engineering changes mid interview because they just realised a more beneficial way of doing something.

Stop getting your information from 4th hand sources

>Wrong it used very expensive natural uranium. About 5 tons with an additional 40+ tons of uranium oxide and several truckloads of graphite. I honestly can't remember those exact details but the reactor was created prior to the bomb because it was inevitable and to test the theory that a reaction wouldn't run away indefinitely. The reactor created by the Manhattan project ran for about a year before being moved and rebuilt and then ran for another decade.

Can you not read at all? The reactor used in the Manhattan Project PRODUCED plutonium. It USED uranium. And it kept running because it was used to keep producing plutonium until '45 and then was used until '63 to produce radioactive isotopes for research. That's 20 years not 10 years.

>Here's a nobody that applied for a patent in 1936, you clearly don't know him LEO SZILARD

Incredible you didn't even read the comment because I literally mentioned Einstein and Szilard's joint letter.