Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > alt.astronomy > #282420 > unrolled thread

How long does it take to get to Mars?

Back to article view | Back to alt.astronomy

Contents

  How long does it take to get to Mars? The Starmaker <starmaker@ix.netcom.com> - 2016-02-26 09:55 -0800
    Re: How long does it take to get to Mars? The Starmaker <starmaker@ix.netcom.com> - 2016-02-26 09:56 -0800
      Re: How long does it take to get to Moon/Mars? "a425couple" <a425couple@hotmail.com> - 2016-02-26 11:00 -0800
        Re: How long does it take to get to Moon/Mars? "Notroll2016" <notroll2015@charter.net> - 2016-02-26 13:18 -0600
          Re: How long does it take to get to Moon/Mars? Arc Michael <abookoflife@yahoo.com> - 2016-03-01 19:50 -0800
      Re: How long does it take to get to Mars? The Starmaker <starmaker@ix.netcom.com> - 2016-02-27 10:56 -0800
    Re: How long does it take to get to Mars? scott@slp53.sl.home (Scott Lurndal) - 2016-02-26 19:50 +0000
    How long does it take to get to Mars? mr.hvac@gmail.com - 2016-02-27 06:59 -0800
    Re: How long does it take to get to Mars? Sergio <invalid@invalid.com> - 2016-02-27 13:51 -0600
      Re: How long does it take to get to Mars? Chrysi Cat <chrysicat@gmail.com> - 2016-03-01 19:34 -0700
        Re: How long does it take to get to Mars? Arc Michael <abookoflife@yahoo.com> - 2016-03-01 19:52 -0800
        Re: How long does it take to get to Mars? mr.hvac@gmail.com - 2016-03-17 15:16 -0700
          Re: How long does it take to get to Mars? 21blackswan@gmail.com - 2016-03-20 10:28 -0700
    Re: How long does it take to get to Mars? Sylvia Else <sylvia@not.at.this.address> - 2016-02-28 12:19 +1100
      Re: How long does it take to get to Mars? Wolffan <AKWolffan@gmail.com> - 2016-02-28 17:45 -0500
    Re: How long does it take to get to Mars? Arc Michael <abookoflife@yahoo.com> - 2016-03-01 19:49 -0800
    Re: How long does it take to get to Mars? Herbert Glazier <herbertglazier0@gmail.com> - 2016-03-17 13:54 -0700

#282420 — How long does it take to get to Mars?

I'm a little confused...

How long does it take to get to Mars?


I'm not sure if it is three months or three days or three seconds...

i think it starts with a three..

[toc] | [next] | [standalone]

#282421

The Starmaker wrote:
> 
> I'm a little confused...
> 
> How long does it take to get to Mars?
> 
> I'm not sure if it is three months or three days or three seconds...
> 
> i think it starts with a three..



how long does it take to get to the Moon?

[toc] | [prev] | [next] | [standalone]

#282422 — Re: How long does it take to get to Moon/Mars?

"The Starmaker" <starmaker@ix.netcom.com> wrote in message...
> The Starmaker wrote:
>> I'm a little confused...

> how long does it take to get to the Moon?

Well, Apollo_17 to put men on the moon,
was launched at 12:33 am EST on December 7, 1972.
"At approximately 2:47 pm EST on December 10, the Service
Propulsion System engine on the Command/Service Module
ignited to slow down the CSM/Lunar Module stack into lunar orbit.
-- The LM touched down on the lunar surface at 2:55 pm EST on
December 11. "
https://en.wikipedia.org/wiki/Apollo_17

So, 3 or 4 days should not be argued with.


>> How long does it take to get to Mars?

Well, the unmanned
Mariner 4  was launched 28 November 1964
and arrived at Mars 14 July 1965  and did a Flyby.
Mariner 6, launched 25 February 1969  and
flew pas Mars on 31 July 1969.

Mariner 9  launched 30 May 1971, arrived 13 November 1971
and was a  Success (first successful orbit).
https://en.wikipedia.org/wiki/Exploration_of_Mars

Proposed Human flight seems slower.
https://en.wikipedia.org/wiki/Human_mission_to_Mars
"The energy needed for transfer between planetary orbits, or "∆V", is lowest 
at intervals fixed by the synodic period. ---- 
Several types of mission plans have been proposed, such as the opposition 
class and conjunction class,[10] or the Crocco flyby.[11] The lowest energy 
transfer to Mars is a Hohmann transfer orbit; a mission to Mars using Hohman 
transfer involves an approximately 9 month travel time from Earth to Mars, 
about five hundred days at Mars to wait for the transfer window to Earth, 
and a Hohmann transfer of about 9 months to return to Earth.

Shorter Mars mission plans have round-trip flight times of 400 to 450 
days,[12] but requiring a higher energy. A fast Mars mission of 245 days 
round trip could be possible with on-orbit staging.[13] In 2014 Ballistic 
capture was proposed, which may reduce fuel cost and provide more flexible 
launch windows compared to the Hohmann.[14]

In the Crocco grand tour, a "humanned" spacecraft would get a flyby of Mars 
and Venus for under a year in space.[15] Some flyby mission architectures 
can also be extended to include a style of Mars landing with a flyby 
excursion lander spacecraft.[16] Proposed by R. Titus in 1966, it involved 
extending a flyby mission with a short stay lander.[16] Basically, a short 
stay lander-ascent vehicle would separate from a "parent" Earth-Mars 
transfer prior to its flyby of Mars.[16] The Ascent-Decent lander would 
arrive sooner and either go into orbit around Mars or land, and depending on 
the design offer perhaps 10–30 days before it needed to launch itself back 
to the main transfer vehicle.[16] (see also Mars flyby)

[toc] | [prev] | [next] | [standalone]

#282423 — Re: How long does it take to get to Moon/Mars?

"a425couple"  wrote in message news:naq7if0eom@news6.newsguy.com...

"The Starmaker" <starmaker@ix.netcom.com> wrote in message...
> The Starmaker wrote:
>> I'm a little confused...

> how long does it take to get to the Moon?

***For Hagar, it depends upon how long it takes to put the wheels back on 
his house and get it started. 

[toc] | [prev] | [next] | [standalone]

#282553 — Re: How long does it take to get to Moon/Mars?

On Friday, February 26, 2016 at 11:18:10 AM UTC-8, Notroll2016 wrote:
> "a425couple"  wrote in message news:naq7if0eom@news6.newsguy.com...
> 
> "The Starmaker" <starmaker@ix.netcom.com> wrote in message...
> > The Starmaker wrote:
> >> I'm a little confused...
> 
> > how long does it take to get to the Moon?
> 
> ***For Hagar, it depends upon how long it takes to put the wheels back on 
> his house and get it started.

Dorthy of Kansas used a windmill vortex? 

[toc] | [prev] | [next] | [standalone]

#282462

The Starmaker wrote:
> 
> The Starmaker wrote:
> >
> > I'm a little confused...
> >
> > How long does it take to get to Mars?
> >
> > I'm not sure if it is three months or three days or three seconds...
> >
> > i think it starts with a three..
> 
> how long does it take to get to the Moon?



http://www.techtimes.com/articles/136939/20160227/flying-to-mars-in-just-30-minutes-may-be-possible-using-laser-propulsion-system.htm


30 minutes to Mars????




how long does it take to get to the Moon? my math is not tooo goood.

[toc] | [prev] | [next] | [standalone]

#282425

The Starmaker <starmaker@ix.netcom.com> writes:
>I'm a little confused...
>

No shit!

[toc] | [prev] | [next] | [standalone]

#282449

Starboy said
How long does it take to get to Mars? 
---------------

Fuck Mars. At least fuck sending humans to Mars. There simply is no point to it. We can do all of research with unmanned rovers.

And at about 2% of the cost to send people.

That means we can spend the other 98% on missions to other planets, build more and better telescopes. Hell, maybe even an attempt to send an underwater mission to one of Jupiter or Saturn's moons.

There are just so many reasons to explore space, but the weak link in the chain is people. We are phasing the people in military combat roles, we should do the same in space exploration.

Of course this would mean zipping up our fly and putting our dicks away. 

[toc] | [prev] | [next] | [standalone]

#282464

On 2/26/2016 11:55 AM, The Starmaker wrote:
> I'm a little confused...
>

I cannot help you with that......

> How long does it take to get to Mars?

how big is "it" ?   delivery times depend upon package size.


>
>
> I'm not sure if it is three months or three days or three seconds...

depends upon where mars and earth are in their orbits, it could take 2 
years or 9 months

Anyhow the radiation will cook whatever "it" is, like a stove on 110 
degrees.


>
> i think it starts with a three..
>

the starting letter of the name of the number may be t..

[toc] | [prev] | [next] | [standalone]

#282551

On 2/27/2016 12:51 PM, Sergio wrote:

<snip>
>
> depends upon where mars and earth are in their orbits, it could take 2
> years or 9 months
>
> Anyhow the radiation will cook whatever "it" is, like a stove on 110
> degrees.
>

Wait, are you saying that there's literally no way to construct 
radiation shielding sufficient to keep humans alive if they travel any 
further from this planet than the Moon?

That...kind of worries me, since Earth can't be around forever.


-- 
Chrysi Cat
1/2 anthrocat, nearly 1/2 anthrofox, all magical
Transgoddess, quick to anger
Call me Chrysi or call me Kat, I'll respond to either!

[toc] | [prev] | [next] | [standalone]

#282554

On Tuesday, March 1, 2016 at 6:34:48 PM UTC-8, Chrysi Cat wrote:
> On 2/27/2016 12:51 PM, Sergio wrote:
> 
> <snip>
> >
> > depends upon where mars and earth are in their orbits, it could take 2
> > years or 9 months
> >
> > Anyhow the radiation will cook whatever "it" is, like a stove on 110
> > degrees.
> >
> 
> Wait, are you saying that there's literally no way to construct 
> radiation shielding sufficient to keep humans alive if they travel any 
> further from this planet than the Moon?

it has nothing to do with the moon. Radiation is out there, and further from protected magnetic fields, which there are many for even our SOLAR SYSTEM, gamma radiation will give you cancer in about a few minuets to a few days, depending upon exposure. so yes, need radiation hardware or change bio of body by DNA to make us metal robots. 
> 
> That...kind of worries me, since Earth can't be around forever.
> 
> 
> -- 
> Chrysi Cat
> 1/2 anthrocat, nearly 1/2 anthrofox, all magical
> Transgoddess, quick to anger
> Call me Chrysi or call me Kat, I'll respond to either!

[toc] | [prev] | [next] | [standalone]

#282998

 
Chrysi Cat 
1/2 anthrocat, nearly 1/2 anthrofox, all magical 
Transgoddess, quick to anger 
Call me Chrysi or call me Kat, I'll respond to either! 
----------

Chrysi, I am concerned since reading your sig

[toc] | [prev] | [next] | [standalone]

#283074

the short answer is - 
it depends on how fast you are going, and multiply/divide that with the distance...

i would guess 3 years, but i've been wrong before

marc

[toc] | [prev] | [next] | [standalone]

#282477

On 27/02/2016 4:55 AM, The Starmaker wrote:
> I'm a little confused...
>
> How long does it take to get to Mars?
>
>
> I'm not sure if it is three months or three days or three seconds...
>
> i think it starts with a three..
>

There no particular answer. A sufficiently capable technology could get 
a person to the moon in 5 hours at a constant 1g acceleration (i.e. 
comfortably). The same acceleration would get a person to Mars in a 
couple of days (when Mars is closest to the Earth).

Higher accelerations give low journey times (but in less comfort).

However, we lack the technology to maintain such accelerations over 
extended periods.

Sylvia.

[toc] | [prev] | [next] | [standalone]

#282501

On 27 Feb 2016, Sylvia Else wrote
(in article <djf092FhgvnU1@mid.individual.net>):

> On 27/02/2016 4:55 AM, The Starmaker wrote:
> > I'm a little confused...
> > 
> > How long does it take to get to Mars?
> > 
> > 
> > I'm not sure if it is three months or three days or three seconds...
> > 
> > i think it starts with a three..
> 
> There no particular answer. A sufficiently capable technology could get
> a person to the moon in 5 hours at a constant 1g acceleration (i.e.
> comfortably). The same acceleration would get a person to Mars in a
> couple of days (when Mars is closest to the Earth).
> 
> Higher accelerations give low journey times (but in less comfort).
> 
> However, we lack the technology to maintain such accelerations over
> extended periods.
> 
> Sylvia.

hmm... let’s see...

s = u*t + 0.5 *a*t^2

s is displacement under accel
u is initial vel
a is accel
t is time under accel

set s to 400,000 km. Yes, I know that that’s not quite right, but it’s 
good enough for government work and it makes for easy calculations.
set a to 10 m/s/s. Yes I know, but see above.
set u to 0. See above.

for continuous accel, there needs to be aceel to halfway, then turnover and 
decel the rest of the way. New s = 200,000 km.

s = 200,000 km = 2 * 10^8 m = 0*t + .5*10*t^2

which means that 4 * 10^8 = 0 + 10 *t^2
t^2 = 4 * 10^7
t = 6324.6 s = 1.756 hours.

That’s t to turnover. t for entire run is 3.51 hours.

of course, getting a rocket with a mission delta-v of 6324.6 * 2 * 10 = 126.5 
km/s might be a tad difficult. (v = u + a * t, and all that.)

If someone wants to get there in half the time, they’d need four times the 
accel. This would be Bad.

Mars at one gee would be considerably more difficult than Luna at one gee, 
and at four gees would be very bad indeed..

[toc] | [prev] | [next] | [standalone]

#282552

On Friday, February 26, 2016 at 9:55:35 AM UTC-8, The Starmaker wrote:
> I'm a little confused...


rather no friends and too imbicilic to socialize outside on the streets, in fear of reprisals of bad behavior. 

[toc] | [prev] | [next] | [standalone]

#282993

On Friday, February 26, 2016 at 9:55:35 AM UTC-8, The Starmaker wrote:
> I'm a little confused...
> 
> How long does it take to get to Mars?
> 
> 
> I'm not sure if it is three months or three days or three seconds...
> 
> i think it starts with a three..

Taking the short cut,and adding powdered iron to the after burners.It will take 3 months 17 days and 44 minutes. Take off 44 minutes if you have a strong solar wind on your back.  TreBert

[toc] | [prev] | [standalone]

Back to top | Article view | alt.astronomy

csiph-web