/sci/ - Science & Math

>>11834764

We’re lucky to live in a time in which the roads to the stars are currently being built before our eyes.

Historians will talk about this time period in the future.

>>11790358
I would give everything i have and will ever own just for the chance to scrub toilets on Mars.

I’m 18 now. Will I be able to go there? My current plan is very very pessimistic, and it entails me saving up $250,000 over the next 25 years in order to buy a suborbital hop on New Shepard.

My ex literally asked me if I loved her and I said no. She asked who I loved then and I just pointed up at the nighttime sky.

>>11754349
>But my guess is
>its unbelievably foolish to think we are landing on mars in just 4 years
Like you said that is your guess. SpaceX and its founder are ideologically driven to make it to mars, their starlink program is set to make more money than amazon and the military/NASA contracts continue to roll in. SpaceX has already innovated, they have already proven their competency and a mars trip is not exactly new tech.

>>11752567
You should look at SpaceX Mars plans as some of your info is either obsolete or wrong.

>the food which needs to last the entire round trip

~300 kilograms per person per year. Add some reserves and as a rule of thumb, you need ton of food per crewmember on a Mars mission. This is very much plausible. Tons of food (along with other supplies) will be prepositioned by multiple unmanned launches on Mars surface before manned flight even takes off.

>the space. on the ISS the astronauts spend 5-6 months, and even that is a little cramped.

Starship will have 1000 cubic meters of volume, a bit bigger than the ISS.

>the bone mass loss and muscle atrophy of a crew spending all that time in a zero g environment

https://spacenews.com/resistive-targeted-exercise-reversed-astronauts-bone-loss-study-finds/

>or, if you have a rotating spacecraft, the mass for that system. even something as simple as a long tube rotating still has mass.

Tethers? Should be very light but also dynamically unstable.

>the mass of the radiation shielding needed to protect the astronauts outside the earth's magnetosphere (an inch of lead, if I recall)

You recall wrong, you need light elements in order to reduce secondary radiation, not lead. There will be a solar storm shelter onboard with ~1 ton per square meter of plastic/water shielding. And manned launches will use faster trajectory of 3-5 months one way. This will be enough to reduce total radiation dose below 1 sievert, which is the career limit for NASA astronaut. Radiation will not stop a Mars mission.