We were taught that Earth orbits the Sun in a closed circle. In reality, Earth has never returned to the same point in space once in 4.5 billion years.
Right now, the Sun is carrying Earth and every planet around the center of the Milky Way at 230 km/s (828,000 km/h), more than 18,000 kilometers every 80 seconds.
Because the Solar System is tilted 60.2° to the galactic plane and bobs up and down through the galactic disc roughly every 30 million years, the planets trace open 3D corkscrew helices across deep space rather than flat loops.
The last time the Sun stood where it stands today, one Galactic Year (230 million years) ago, the very first dinosaurs were only beginning to appear on Earth. Since forming 4.6 billion years ago, our Sun has completed only 20 laps.
Back in 2014, Elon Musk founded a school Ad Astra right inside SpaceX HQ to teach kids how to think and solve problems from first principles
In rare footage, Elon explains:
“Let’s look at the physics and economics of a rocket…”
Instead of accepting that something is impossible because others have failed at it, break the problem down to fundamental truths......what the physics and materials actually allow....then reason up from there to see what’s possible
The same mindset made SpaceX make reusable rockets a reality, being passed on to the next generation
Elon Musk on first principles thinking:
"It’s important to reason from first principles rather than by analogy
The normal way we conduct our lives is we reason by analogy...
With first principles, you boil things down to the most fundamental truths and say, 'What are we sure is true?'
And then reason up from there"
"I need to be a bit concise, because if we talked about all the good memories, we would be talking for a long time." - @LangeVictor
Full 📹 | https://t.co/FsJdVYRrUU
South Africa's @LangeVictor has made a remarkable recovery from the coronavirus, having tested positive back in March.
He now calls on tours and players to proceed with great caution and high alert.
https://t.co/9DEQG0lviA