Profile: 266ee740...
Since your handle is “Whole Mars”, perhaps this lengthy reply is apropos:
Getting the cost per ton to the surface of Mars low enough that humanity has the resources to make life multiplanetary requires a roughly 1000X improvement in rocket & spacecraft technology.
Recent US Mars missions have had a cost per ton of useful load to the surface of Mars of about $1B. Moreover, it has become more, not less, expensive over time!
To build a city on Mars that can grow by itself likely requires at least a million tons of equipment, which would therefore require >$1000 trillion, an obviously impossible number, given that US GDP is only $29T.
However, if rocket technology can be improved by 1000X, then the cost of becoming sustainably multiplanetary would drop to ~$1T, which could be spread out over 40 or more years, so <$25B/year.
At that cost, it becomes possible to make life multiplanetary, ensuring the long-term survival of life as we know it, without materially affecting people’s standard of living on Earth.
Starship is designed to achieve a >1000X improvement over existing systems and, especially after yesterday’s booster catch and precise ocean landing of the ship, I am now convinced that it can work.
If even simple bacterial life is discovered on Europa, this will be the most significant planetary mission ever.
Godspeed @EuropaClipper!
It is important in this often difficult and troubled world for there to be things that also inspire and make you feel great to be part of humanity
Even rockets need hugs 🥰 https://t.co/oF36F0AvBf 
Cybertruck is just such an awesome product. You don’t realize how fun & useful it is until you try it!
The next generation Starlink satellites, which are so big that only Starship can launch them, will allow for a 10X increase in bandwidth and, with the reduced altitude, faster latency
We gotta win, but, once we do, we can cut the millions of strings that, like Gulliver, hold back the giant that is America!
Achieving materially positive payload margin to a useful orbit with a fully & rapidly reusable rocket has eluded prior attempts. Many have tried to embark upon this path only to give up when it became clear that their design would have negative or negligible payload margin.
This is an extremely difficult problem to solve, given the strong gravity of Earth, whereas it is easy on Mars and trivial on the Moon. In the early years of SpaceX, I was not sure that success was even in the set of possible outcomes!
Fortunately, it just barely is, but requires doing unusual things like shifting the mass needed for final velocity attenuation and post-landing stabilization of the rocket (so it doesn’t tip over in wind) to the ground, rather than carrying heavy landing gear on both stages.