Elon Musk says building the first sustainable city on Mars will take 1.000 Starships and 20 years
Musk's stated launch cost of only around $2 million per Starship flight is essentially required, should the final goal be to set up a "self-sustaining city on Mars"
India has a new planetary target in mind: Venus
In addition to mapping the surface itself, looking a bit deeper into the planet should help scientists identify volcanic hotspots scattered across Venus
Mars Society founder makes case for “Mars Direct” path to the Red planet
But what is the "Mars Direct" plan