Winter solstice

rfoshaug · Dec 11, 2007

<blockquote>In reply to:<hr />For you rfoshaug, it is a moot point, as the Sun does not rise at all for you. It must still get fairly light at noon, as the Sun approaches to about 3 degrees, below your southern horizon, well within Civil Twilight? <hr /></blockquote> Yes, that is true. Even on the 21st of December, it is twilight around noon, and from about 10:00 to about 14:00, it's bright enough that you don't have to use high beams on your car unless the clouds are heavy. So it is not a true Civil or astronomical polar night here. <blockquote>In reply to:<hr />Just realised, your latitude is virtually the same as the landing site of the Mars Phoenix Lander on Mars.<hr /></blockquote> Cool. As Mars has even more axial tilt than Earth, operations will surely stop for the solar powered lander when winter sets in. But I guess that's a discussion for the Phoenix thread. <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> ----------------------------------My minds have many opinions </div>

MeteorWayne · Dec 11, 2007

Actually, as I recall, operations will end when winter comes since the craft is unlikely to survive the year long winter at that latitude. Feel free to correct me if I'm wrong, anyone. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

3488 · Dec 11, 2007

Hi rfoshaug, How's this???? Bardufoss, Norway, Summer Solstice Midnight Sun. Bardufoss, Norway, Winter Solstice Midday Sun. Mars Phoenix Lander Summer Solstice Midnight Sun. Mars Phoenix Lander Winter Solstice Midday Sun. It is strange that both locations have very similar latitudes & views of the Sun, despite different planets. <img src="/images/icons/laugh.gif" /> Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Dec 11, 2007

That's correct MeteorWayne, The shorter days & lowering temperatures will kill off Mars Phoenix Lander. Shame Phoenix is not RTG powered. Winter observations from that site would also be very, very interesting. Weird twilight glows, high clouds, CO2 frost & ice accumulating, etc. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

rfoshaug · Dec 12, 2007

Very cool, Andrew! <img src="/images/icons/laugh.gif" /> The main difference is in the angular size of the sun - and the fact that Earth is in the same area as the sun on one image). <img src="/images/icons/smile.gif" /> Maybe NASA should try to achieve the goal, before this decade is out, of landing a man on Bardufoss and returning him safely. Or at least land a space shuttle at Bardufoss airport... <img src="/images/icons/wink.gif" /> It's remarkable how similar Mars and Earth are when it comes to the lenght of the day and axial tilt. However judging by the constellations around the sun at the solstices, the axial tilts point in different directions in space (ie. Polaris is not along the rotational axis of Mars). The sun should still pass through the 12 constellations of the zodiac (as Mars is less than 2Â° inclined to the ecliptic), however Leo is a midwinter constellation on Mars it seems as opposed to late summer on Earth. I wonder how an astrologer on Mars would deal with that... Oh well, I doubt there will be any astrologers on board for the first 100 missions. <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> ----------------------------------My minds have many opinions </div>

3488 · Dec 12, 2007

Hi rfoshaug, Yes the polar direction on Mars is very different. North Polar sky on Mars. South Polar sky on Mars. The Yellow circle has a radius of 10 degrees. Deneb / Alpha Cygni & Alderamin / Alpha Cephei just about fall within the Northern circle. I turned off the Natural Sky colour for the Northern one, as it is daylight there under a red sky. With respect to the plane of the Milky Way, Mars is on its side. The sun does pass through the same 13 constellations as seen from Mars, as from Earth. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

MeteorWayne · Dec 12, 2007

Thanx for the north polar view. I'll be thinking of Mars when I look at that part of the sky from now on <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

rfoshaug · Dec 13, 2007

Thanks, Andrew. <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> ----------------------------------My minds have many opinions </div>

alokmohan · Dec 14, 2007

Anyway when is solstice?

adrenalynn · Dec 14, 2007

Ummm - did you read your own post? ROFL! The precise moment of the 2007 solstice will be Sat., Dec. 22, 1:08 A.M. EST (06:08 UT). Are you confused - or am I? <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

MeteorWayne · Dec 14, 2007

He never does.... <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

alokmohan · Dec 16, 2007

Correct I never read my posts and I am never confused.This time it is skyandtelescope .com.But they are wrong and confused.http://www.skyandtelescope.com/about/pressreleases/3309826.html

adrenalynn · Dec 16, 2007

So which is it? <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

alokmohan · Dec 16, 2007

Sat., Dec. 22, 2007, 1:08 A.M. EST (06:08 UT), marks the solsticeâ€”the beginning of winter in the Northern Hemisphere and summer in the Southern Hemisphere by Ann-Marie Imbornonihttp://www.infoplease.com/spot/wintersolstice1.html

adrenalynn · Dec 16, 2007

Which is what you wrote in your post AND what I quoted you as having posted. The first one you posted was from something like a couple years ago, IIRC. <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

SpeedFreek · Dec 16, 2007

Post deleted by speedfreek <div class="Discussion_UserSignature"> _______________________________________________ SpeedFreek </div>

alokmohan · Dec 17, 2007

Tuesday morning, December 21st, at 7:42 a.m. Eastern Standard Time, the Sun will reach its southernmost point in the sky for 2004 and begin its six-month return journey northward. This moment marks the December solstice, the official beginning of winter in the Northern Hemisphere and a time of great celebration in many northern tHIS WAS MY POST .But 21st dec is not tuesdy.

adrenalynn · Dec 17, 2007

And it's also not 2004. ROFL <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

usn_skwerl · Dec 17, 2007

dude, seriously..... <img src="/images/icons/rolleyes.gif" /> *shakes head* <div class="Discussion_UserSignature"> </div>

SpeedFreek · Dec 17, 2007

Whoops it seems I'm confused too! <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> _______________________________________________ SpeedFreek </div>

MeteorWayne · Dec 17, 2007

Just to avoid all confusion, the 2007 Winter Solstice is at 6:08 UT Dec 22, which is 1:08AM EST Dec 22, and 10:08 PST on Dec 21 (for Adrenalynn <img src="/images/icons/smile.gif" /> ) Although I also have found sources that say 0607 UT and 0609 UT. I'm still trying to find a definitive answer 0607 SkyMap Pro 0608 Sky and Tel, Astronomy, USNO 0609 Science World <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

adrenalynn · Dec 17, 2007

I'm leaning towards the USNO. Those guys tend to know what they're doing. I suppose we could run off and calculate it. If the Mayans could manage it with sticks and rocks - I'm betting I could probably get in the neighborhood with a hundred gigahertz of processing power and the highest-end higher-math software on the planet... <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

alokmohan · Dec 18, 2007

So nice of you no further confusion.Can you say in terms of GMT? In India we call it uttarayana.Uttar means north.The sun starts moving north.Hindus consider uttarayan with rever.In Mahabharata our epic,Bhisma,wwho could die only at will choose uttarayan as his death of day.

adrenalynn · Dec 18, 2007

Can you say in terms of GMT? He did. UT = GMT = GT = UTC = Zulu = the time along the prime meridian (0 longitude) that runs through Greenwich Observatory outside of London, UK <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

adrenalynn · Dec 18, 2007

First-blush, I come up with Dec 21, 2007 22:08:18.62 PST For Spring Equinox, I get March 19 2008 22:53 (rounded), For Summer Solstice, I get June 20, 2008 16:56, Fall: Sept 22 2008, 8:35am I compute my next lunar eclipse Feb 20, 2008, 17:42-21:06 and it appears to be total. Only good one of the year. <div class="Discussion_UserSignature"> .bipartisan (bī-pär'tĭ-zən, -sən) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.IMPEACH OBAMA! </div>

Winter solstice

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