What time is it on Mars?

FREE PUBLIC ASTRONOMY LECTURE

WHAT TIME IS IT ON MARS?

The era will come when we must let go of Earth clock and calendar and
build a new scheme of timekeeping peculiar to our new abodes on
other
worlds. How?

by Dr Michael Allison
Goddard Institute for Space Studies

Thursday 7 August 2008 7PM

NYSkies Astronomy Seminar
St Paul's Lutheran Church
315 West 22nd St
near 8th Av, Chelsea

www.nyskies.org

212-273-5958

"Paz" wrote in message
...
| FREE PUBLIC ASTRONOMY LECTURE
|
| WHAT TIME IS IT ON MARS?


FREE PUBLIC ASTRONOMY ANSWER
Same time as it is on the ISS and near Saturn,
one hour behind the time in London.

http://spaceflight.nasa.gov/realdata/tracking/
http://saturn.jpl.nasa.gov/operations/saturn-time.cfm


Got any more stupid questions?

On Jul 31, 5:08*pm, "Androcles" wrote:
"Paz" wrote in message

...
| FREE PUBLIC ASTRONOMY LECTURE
|
| WHAT TIME IS IT ON MARS?

FREE PUBLIC ASTRONOMY ANSWER
*Same time as it is on the ISS and near Saturn,
one hour behind the time in London.

*http://spaceflight.nasa.gov/realdata/tracking/
*http://saturn.jpl.nasa.gov/operations/saturn-time.cfm

Got any more stupid questions?

Nope. These are still ganged to the concepts of time ON EARTH. When we
LEAVE Earth and work on an other planet, we can not keep the LOCAL
PLANET'S time with Earth concepts. A new 'day', and 'year' have to be
worked out. It's NOT a trvial question. Come to the lecture.

"Paz" wrote in message
...
On Jul 31, 5:08 pm, "Androcles" wrote:
"Paz" wrote in message

...
| FREE PUBLIC ASTRONOMY LECTURE
|
| WHAT TIME IS IT ON MARS?

FREE PUBLIC ASTRONOMY ANSWER
Same time as it is on the ISS and near Saturn,
one hour behind the time in London.

http://spaceflight.nasa.gov/realdata/tracking/
http://saturn.jpl.nasa.gov/operations/saturn-time.cfm

Got any more stupid questions?

Nope. These are still ganged to the concepts of time ON EARTH.

--------------------------------------------------------------------
Yes, that is what we homo sapiens sapiens use for our GPS.
What little green men, robots and homo neanderthalensis with their
Julian calendar use, sols on Mars with a long year, may be as
different as the metric system is from imperial units, but I for
one will continue to use Earth time in agreement with NASA-JPL.
Roman miles and Mars minutes don't appeal to me much.
=======================================
When we
LEAVE Earth and work on an other planet, we can not keep the LOCAL
PLANET'S time with Earth concepts.
============================================
You'll miss "Coronation Street" on the telly, then.
Those poor people in the ISS aging a day every 90 minutes
because they left Earth...
============================================
A new 'day', and 'year' have to be
worked out. It's NOT a trvial question. Come to the lecture.
============================================
Come to YOUR lecture? HAHAHAHA!
You must hallucinate I'm planning on designing a Martian grandfather
clock, which would be stupid of me.
After you've terraformed Antarctica, a whole continent with plenty of
water, ideal atmosphere, beautiful Earthlike gravity, and after you've
grown grapes there in the six months of continuous sunshine, then
I'll consider mining for gold or diamonds in some other planet's
hostile environment. BTW, what's the local time at the South Pole?

On 2008-07-31, Androcles wrote:

After you've terraformed Antarctica, a whole continent with plenty of
water, ideal atmosphere, beautiful Earthlike gravity, and after you've
grown grapes there in the six months of continuous sunshine, then
I'll consider mining for gold or diamonds in some other planet's
hostile environment. BTW, what's the local time at the South Pole?

The Amundsen-Scott base keeps New Zealand time.

--
Andrew Smallshaw

On Aug 1, 12:49*am, "Androcles" wrote:
*BTW, what's the local time at the South Pole?

There is only one correct answer - any time you like

On Jul 31, 10:57*pm, Paz wrote:
FREE PUBLIC ASTRONOMY LECTURE

WHAT TIME IS IT ON MARS?

The era will come when we must let go of Earth clock and calendar and
build a new scheme of timekeeping peculiar to *our new abodes on
other
worlds. How?

by Dr Michael Allison
Goddard Institute for Space Studies


I do not know why they do this considering that I have yet to see a
single person appreciate the Equation of Time principles which create
the equable 24 hour day out of the variations in natural noon and
weighed against the annual cycle of 365 days 5 hours 49 minutes or the
1461 day calendrical extension which conveniently equalises the annual
fractions to a 365/366 day system with the leap correction (Feb 29th).

What exists is a fictional and disruptive setup based on so-called
'sidereal time' -

http://upload.wikimedia.org/wikipedi...3%A9reo.en.png

How people created a mess by imagining a 3 minute 56 second difference
between the return of a star to a meridian and the return of noon in
exactly 24 hours in order to justify axial and orbital motion is quite
an assault on the eyes but is now the most dominant belief despite its
absurdity.


Before these guys give lectures about timekeeping on Mars,they had
better get to grips with astronomical timekeeping on Earth,try Huygens
for a start in demonstrating the procedure to extract the 24 hour day
from natural noon variations -

http://www.xs4all.nl/~adcs/Huygens/06/kort-E.html

The upshot is that the Equation of Time dramatically re-enters the
astronomical picture as a means to seperate diurnal axial rotation
from a seperate orbital component as a location slowly turns through
360 degrees with respect to the central Sun and takes an entire orbit
to do so.The Equation of Time represents the rate of change of that
orbital component insofar as orbital motion and geometry in in
accordance with Kepler's view.






Thursday 7 August 2008 7PM

NYSkies Astronomy Seminar
St Paul's Lutheran Church
315 West 22nd St
near 8th Av, Chelsea

www.nyskies.org

212-273-5958

"Andrew Smallshaw" wrote in message
...
| On 2008-07-31, Androcles wrote:
|
| After you've terraformed Antarctica, a whole continent with plenty of
| water, ideal atmosphere, beautiful Earthlike gravity, and after you've
| grown grapes there in the six months of continuous sunshine, then
| I'll consider mining for gold or diamonds in some other planet's
| hostile environment. BTW, what's the local time at the South Pole?
|
| The Amundsen-Scott base keeps New Zealand time.

Uh huh... and what about Faraday and Mid-Point Charlie and McMurdo and ...

http://www.gdargaud.net/Antarctica/RadarSat.html


Even in Iceland its pretty hard to pin down the time of sunset and that's a
well
populated island in the middle of the Atlantic Ocean. Not too many palm
trees
but lots of glorious sunshine and the hot springs make it an attractive
place to
live, much better than Mars.

On Thu, 31 Jul 2008 15:02:43 -0700 (PDT), Paz
wrote:

Nope. These are still ganged to the concepts of time ON EARTH. When we
LEAVE Earth and work on an other planet, we can not keep the LOCAL
PLANET'S time with Earth concepts. A new 'day', and 'year' have to be
worked out. It's NOT a trvial question. Come to the lecture.

Sounds like an interesting talk.

I think most people recognize that there needs to be a unified timebase
that is independent of any local time. What they called "stardate" on a
certain popular TV series. I expect that will be UT or one of its minor
variations for a very long time to come.

Separately, there will be local time systems if we settle other planets.
Mars will probably end up with its days divided into 24 hours, just like
on Earth. I'd expect people there to run their own calendar, but convert
it to UT (stardate) as required- not usually for day-to-day stuff.

Things get more interesting if we settle places that don't have a
natural day, or that have an unworkably long year in human terms.

If you attend the lecture, and there are interesting ideas to report,
please post them back here.
_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 2008-08-01, Androcles wrote:

"Andrew Smallshaw" wrote in message
...
| On 2008-07-31, Androcles wrote:
|
| BTW, what's the local time at the South Pole?
|
| The Amundsen-Scott base keeps New Zealand time.

Uh huh... and what about Faraday and Mid-Point Charlie and McMurdo and ...

But they're not at the South Pole.

Regardless of where your location, though, 'now' is the same time
anywhere even on other bodies and even when relevatistical effects
are factored into the equation. The issue is basically one of
measurement units and where to place the zero point.

In the specific case of Mars it is easy enough to imagine colonies
adopting local time given that the day is probably near enough to
Earth's for 'body-clock' adjustment. In that instance you would
expect the time used to be the local time of the first station,
and then possibly that would become an de facto prime meridian that
later stations offset their time from.

On other bodies it may be more difficult - if a day is less than
18 hours or longer than 30 it may well prove too big an upset for
people's natural cycle to adapt to. There politics will invariably
play a role - you can see this already with Mir which ran Moscow
time and the ISS which runs UTC.

Regardless, it isn't a trivial issue, although proposing solutions
now does seem a little premature. If I was in the neighbourhood
I may have been tempted to go along myself.

--
Andrew Smallshaw