[math-fun] Venustransit 5th/6th June
I want to remind you on the last Venus transit that you will ever see (next one in more than 100 years), if you happen to live in a place where it is visible: http://eclipse.gsfc.nasa.gov/OH/transit12.html http://en.wikipedia.org/wiki/Transit_of_Venus,_2012 Wait, did I really send out a wikipedia link? *gg* (Seriously: I just love wikipedia.) Christoph
here is a picture of the sun http://apod.nasa.gov taken by the Solar Dynamics Observatory. this is a live image. you can update it every 15 minutes or so, to watch the transit in case it's cloudy where you are. bob --- Pacher Christoph wrote:
I want to remind you on the last Venus transit that you will ever see (next one in more than 100 years), if you happen to live in a place where it is visible:
http://eclipse.gsfc.nasa.gov/OH/transit12.html http://en.wikipedia.org/wiki/Transit_of_Venus,_2012
Wait, did I really send out a wikipedia link? *gg* (Seriously: I just love wikipedia.)
Christoph _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
Do Venus transits ever occur in triples? If not, is there some orbital resonance, or extremely precise orbital tilt, that assures Venus transits can only happen in pairs? - Scott -----Original Message----- From: math-fun-bounces@mailman.xmission.com [mailto:math-fun-bounces@mailman.xmission.com] On Behalf Of Robert Baillie Sent: Tuesday, June 05, 2012 1:50 PM To: math-fun Subject: Re: [math-fun] Venustransit 5th/6th June here is a picture of the sun http://apod.nasa.gov taken by the Solar Dynamics Observatory. this is a live image. you can update it every 15 minutes or so, to watch the transit in case it's cloudy where you are. bob --- Pacher Christoph wrote:
I want to remind you on the last Venus transit that you will ever see (next one in more than 100 years), if you happen to live in a place where it is visible:
http://eclipse.gsfc.nasa.gov/OH/transit12.html http://en.wikipedia.org/wiki/Transit_of_Venus,_2012
Wait, did I really send out a wikipedia link? *gg* (Seriously: I just love wikipedia.)
Christoph _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
On 6/5/12, Huddleston, Scott <scott.huddleston@intel.com> wrote:
Do Venus transits ever occur in triples?
Yes, the last triple was in 1275, 1283, and 1396 according to Fred Espenak [1]. OEIS sequence A171467 [2] gives a list of transit years.
If not, is there some orbital resonance, or extremely precise orbital tilt, that assures Venus transits can only happen in pairs?
There *might* a resonance between Venus and Earth, but it's different: When Venus is at inferior conjunction (closest to the Earth), it always presents the same face towards Earth. According to [3], "Whether this is a resonance effect or merely a coincidence is not known.". The abstract of [4] agrees with this, but I don't want to pay for the paper (hint: Elsevier). - Robert [1] Fred Espenak, Transits of Venus: Six Millennium Catalog: 2000 BCE to 4000 CE. http://eclipse.gsfc.nasa.gov/transit/catalog/VenusCatalog.html [2] http://oeis.org/A171467 [3] http://nineplanets.org/venus.html [4] http://www.sciencedirect.com/science/article/pii/0019103569900682 -- Robert Munafo -- mrob.com Follow me at: gplus.to/mrob - fb.com/mrob27 - twitter.com/mrob_27 - mrob27.wordpress.com - youtube.com/user/mrob143 - rilybot.blogspot.com
participants (4)
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Huddleston, Scott -
Pacher Christoph -
Robert Baillie -
Robert Munafo