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

Cross-posted to 4 groups.

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"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)

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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

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