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Somehow NASA is having trouble flying around the moon in a crewed spacecraft something they did 58yrs ago and they want to live on Mars... haha
Mars will never be inhabited by us.
Mars lost its magnetic field, then the solar wind, or cosmic rays blew off its atmosphere. Mars once may have been like the earth, but now it's a hellscape.
Mars therefore cannot be "terraformed" with an atmosphere by nuking the polar ice (Musk likes this idea).
Anything resembling an atmosphere will be wiped away immediately by the sun.
Mars also lacks some essential chemicals for growing plants; I believe Nitrogen is one.
The same solar rays bombarding Mars makes walking around deadly; you have to live in a cave or underground to survive.
clambo says
Mars will never be inhabited by us.
Mars lost its magnetic field, then the solar wind, or cosmic rays blew off its atmosphere. Mars once may have been like the earth, but now it's a hellscape.
Mars therefore cannot be "terraformed" with an atmosphere by nuking the polar ice (Musk likes this idea).
Anything resembling an atmosphere will be wiped away immediately by the sun.
Mars also lacks some essential chemicals for growing plants; I believe Nitrogen is one.
The same solar rays bombarding Mars makes walking around deadly; you have to live in a cave or underground to survive.
If it lost, that implies there was atmosphere?
Mars will never be inhabited by us.
Mars lost its magnetic field, then the solar wind, or cosmic rays blew off its atmosphere. Mars once may have been like the earth, but now it's a hellscape.
Mars therefore cannot be "terraformed" with an atmosphere by nuking the polar ice (Musk likes this idea).
Anything resembling an atmosphere will be wiped away immediately by the sun.
Mars also lacks some essential chemicals for growing plants; I believe Nitrogen is one.
The same solar rays bombarding Mars makes walking around deadly; you have to live in a cave or underground to survive.
Mars once may have been like the earth, but now it's a hellscape.
We probably won't live on planets much anyway
Venus is so bad a ship would self destruct there in minutes, killing everyone aboard.


Venus is so bad a ship would self destruct there in minutes, killing everyone aboard.
Mars for research and maybe minerals. But yeah, it will never have anything like a decent atmosphere again due to the lack of mass and geological activity.
We probably won't live on planets much anyway. Looks like Icy Moons and Asteroids are the best candidates.
Top priority is a spinning habitat of some kind, and having people live there for 3, 6, 12, 18, 24 months under .12, .3, .5 gravity and do biometrics. Then finding ways to deal with mold and getting them 90%+ self-sufficient in basic life support.
My hope is that 0.3G is enough to get rid of most of the long term 'space sickness' problems.
Colonizing other planets in our own solar system is idiotic.
stereotomy says
Colonizing other planets in our own solar system is idiotic.
True, too hard to adapt Mars to support Earthlings, but we could engineer beings designed to live on Mars.
Then we'd create a separate sentient species to compete with us, unless they are engineered to be our slaves. Either outcome is abhorrent.
1) Any colonization requires some degree of terraforming - either the planet at large, or replicating Earthlike conditions in large enclosed areas.
2) These colonies would be incredibly expensive to maintain, since supplies have to go up Earth's gravity well and brave reentry to the colony world to be delivered.
3) Forget about planetary tourism - having to scale two gravity wells for a round-trip is incredibly energy intensive and dangerous to boot. Even if it's 1 in a thousand, the chance of major mishap is orders of magnitude more dangerous than anything other than playing in traffic.
On the other hand, a hollowed-out asteroid can be stuffed full of organic material and spun up to create a large enclosed biosphere, with the bonus that the miles of rock surrounding the central biosphere completely block radiation and the solar wind.
Better yet, it's mobile. Set up rocket engines or even electromagnetic launchers to throw away mass for propulsion. There are no steep gravity wells to surmount other than that of the sun. Space tourism is possible - set it up for multiplanet fly-bys.
An asteroid colony could be built today, with current technology, and would essentially be independent of Earth, since it has easy access to the riches of the solar system.
This is exactly why it will never be allowed to be built - it couldn't be controlled, not to mention that such a colony could drop rocks on the Earth if push came to shove.
As far as a sentient species to compete with humans, that is going to happen anyway here on Earth. Someone will genetically engineer a superhuman intellect or cybernetically create a AI that cascades into creating even more advanced AI.
Hohman Transfer from Earth
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Instead, change the re-entry profile and hope for the best.
Because everything with the program is over budget and far behind schedule, it can't be tested.
Here's NASA's explanation of why they think the Orion Heat Shield won't fail with Artemis 2