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Old 11-27-2018, 12:45 PM
 
Location: Seattle
2,396 posts, read 506,465 times
Reputation: 2212

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Quote:
Originally Posted by Thoreau424 View Post
Huh? The radiation comes from the sun. How are you going to outrun or hide from the sun? This isn't an earth issue, or "higher thrust" matter. That's totally irrelevant.

Simple: half the trip time means half the exposure. It's totally relevant.
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Old 11-27-2018, 02:00 PM
 
Location: North Carolina
3,921 posts, read 2,499,426 times
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Once you get there and you're and not cooked by the radiation. It can get to about -240° at the poles. 70° at the equator but down to -150° at night. Try and stay warm. Month long dust storms. That puts a kink in your solar charging. Bring lots of food. Ever see that movie, Martian. It show harsh conditions. That movie is like Disneyland compared to what its like on Mars. No cell phone service. That cuts out about 99.9999% of the population that would go.

Last edited by RcHydro; 11-27-2018 at 02:29 PM..
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Old 11-30-2018, 09:07 PM
 
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Not to mention it is like 9 million miles away. Not even worth sending people there unless speeds pick up drastically.

Reality is that increasingly sophisticated drones/robots is probably the future of space exploration, whereas Star Trek is just a fantasy.
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Old 12-02-2018, 08:09 AM
 
22,794 posts, read 17,268,975 times
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Quote:
Originally Posted by UrbanAdventurer View Post
Not to mention it is like 9 million miles away. Not even worth sending people there unless speeds pick up drastically.

Reality is that increasingly sophisticated drones/robots is probably the future of space exploration, whereas Star Trek is just a fantasy.
Mars has never been a mere 9 million miles from Earth.

The distance between Earth and Mars is constantly changing. On average the distance between the two planets is 140 million miles. The closest known approach of Mars to Earth was in August 2003 when Earth and Mars were only 34.8 million miles apart. When their respective orbits put Earth and Mars on opposite sides of the Sun they are 250 million miles from each other.

https://www.space.com/16875-how-far-away-is-mars.html

Manned travel between Mars and Earth would have to be timed so that arrival at destination would be when the two planets are at their closest to each other.

Last edited by Mike555; 12-02-2018 at 08:43 AM..
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Old 12-02-2018, 09:32 AM
 
22,794 posts, read 17,268,975 times
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Here's a real time Earth/Mars distance calculator. Watch the distance increase by miles per second.

Emory Physics | Mars Geocentric Distance

In less than two minutes the distance between Earth and Mars increased by 1,000 miles.

8:36.07 MST - 94,978,000 miles

8:38.05 MST- 94,979.000 miles

Last edited by Mike555; 12-02-2018 at 09:42 AM..
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Old 12-07-2018, 02:36 PM
 
Location: Seattle
2,396 posts, read 506,465 times
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Even with a habitable structure on Mars, what concerns me is the long-term effect of the low gravity on the human body. Will a fetus develop properly? A baby may be born malformed, assuming it's weakened bone structure can even survives the birth process. The planet may not be able to host a self-sustaining population until we start tinkering with the human genome and apply adaptations.
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Old 12-10-2018, 10:05 AM
 
Location: San Antonio, Texas
80 posts, read 36,437 times
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During Apollo the spacecraft was set to rotate so the insulation would be evenly "cooked" and would not give out in a given area so quickly. Radiation exposure though was a reason that NASA developed the supplement DHA to help repair cell membranes. Jack Swigert (Apollo 13) died of cancer in 1983, almost 12 years after his flight and it is not impossible that radiation on Apollo 13 contributed to his death. Radiation experiments were also carried out on Skylab, The Shuttle, LDEF, and other biological missions. Take a look around if you want to know what you need to do about it.


Even without radiation, the Soviet Union's best record on MIR is 437 days.
https://en.wikipedia.org/wiki/Valeri_Polyakov

Psychologically, experience with Space Station operations have cleared the human barrier. The only question left is the radiation exposures. Putting aside Swigert, we know for sure most Apollo Astronauts had heart problems upon return.

https://www.nbcnews.com/health/heart...onauts-n618116
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