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  • On vous prend pour des cons et j'en rajoute une couche...
 
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A LA UNE

26 janvier 2014 7 26 /01 /janvier /2014 08:22

Après la Bretagne en début d'année, le Sud Est il y a quelques jours, voici le Sud Ouest touché.

 

2146150.jpg

 

Photo de l'année dernière, mais très symbolique....

 

 

Je préviens depuis plusieurs années que les cycles solaires faibles entraînent des phénomènes climatiques extrêmes dans leur phase de descente. Nous sommes dans un cycle faible, mais à son maximum, en ce moment.

 

Ce cycle sera au plus faible vers 2022 et nous devons donc nous attendre à des phénomènes similaires de plus en plus fréquents, de plus en plus intenses. Tout laisse à penser que le cycle suivant sera encore plus faible, et le suivant, quasi nul. Ce qui fera du XXI ème siècle celui de la catastrophe climatique ( ou changement climatique brutal ).Voir ICI.

 

Il y a un dicton qui dit que le temps entre la Noël et l'Epiphanie détermine le temps de l'année.... Du 15 Décembre au 5 Janvier, chaque jour détermine un mois de l'année. Je ne sais pas si c'est un dicton breton uniquement. En tout cas, j'ai trouvé des archives départementales, et c'est pas joyeux s'il s'avère véridique. Cela donnerait pour 2014, ici, en Morbihan :

 

Janvier : Variable, doux, vent.

 

Février : Variable, plutôt beau, frais.

 

Mars : Pluie, doux.

 

Avril : Variable, tendance beaux temps, doux.

 

Mai : Beau, sec, doux.

 

Juin : Viariable, tendance humide, doux.

 

Juillet : Variable, frais.

 

Août : Pluie, vent, doux.

 

Septembre : Variable, doux, vent modéré.

 

Octobre : Variable, vent.

 

Novembre : Variable, vent.

 

Décembre : Pluie, vent.

 

 

Nous voilà prévenus pour ici. De l'eau, temps chaotique la plupart de l'année et beaucoup de vent en fin d'année. Eté pourri.  Nous allons profiter du mois de Mai....

 

Pour Janvier, cela se confirme... Après une journée printanière hier, journée de merde aujourd'hui, avec beaucoup d'eau et du vent soutenu.... Températures douces sinon 2 jours dans le mois avec une relative fraîcheur.... S'il y a froid, ce sera en Février.

 

Je tiendrais au courant, mois par mois, si ce dicton tient la route ( plutôt le ciel )....

 

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LLéa 27/01/2014 22:21


Coucou,


 


Merci Pimpim, merci Néo,


 


Nous verrons. Je ne sais pas si les dictons des anciens sont encore valables, avec toute la panoplie de technologies dont les puissants ont les clefs. Les sorbiers des oiseleurs étaient pleins de
baies, cela annoncerait un hiver rigoureux, en fait, jusqu'a présent, pas de grosses neiges, ni de gros froids.


Bisous, gros, Léa.

Ferlinpimpim 27/01/2014 23:39



Coucou Léa, en février, le froid, mais pas intense, visiblement... C'est la douceur qui va prédominer et ce n'est pas une bonne nouvelle pour la nature....


 


Gros bisous.



neo 27/01/2014 17:20


http://earthsky.org/astronomy-essentials/mars-2014-opposition-how-to-see-april-best-time-to-see-brightest?utm_source=EarthSky+News&utm_campaign=42f600e262-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-42f600e262-393511181


 


By Deborah Byrd and Bruce McClure in
Tonight | Astronomy Essentials | Space on
Jan 25, 2014









When to see Mars in 2014








Mars and M44 image by Peter Wienerroither











Mars has good years in our sky, and it has years in which you hardly notice it. 2014 is a good year! Look for Mars tonight.


















Mars with its mysterious dark markings and a white polar cap easily visible. Image Credit: NASA



Mars alternates between good and bad years for viewing in our sky, and 2014 is a good year! Why? Because Earth will fly between the sun and Mars on April 8, 2014, and, for the months around
that time, Mars will be at its brightest and best for this two-year period. It’ll also be in a convenient place for viewing. Between now and April, you can start watching for Mars in the
night sky. Mars looks like a bright red star, although it shines with a steadier light than the twinkling stars. Follow the links below to learn more about seeing Mars in 2014.



When should I look for Mars?



Why will Mars be brightest and best in April, 2014?



Every opposition of Mars is special.



Can you still see Mars after April 2014?




View larger. | Mars was brilliant while near the star cluster M44 in mid April 2010. It is the bright reddish
object in the upper left of this beautiful image by Peter Wienerroither. Used with permission.





In January-July 2014, Mars shines in front of the constellation Virgo, at times near the bright star Spica. In late January, look for Mars from midnight until dawn. It was near the moon on
the mornings of January 22 and 23. This chart shows January 23. Read
more.



When should I look for Mars? Short answer: tonight!


January, 2014. Mars spends the month of January 2014 getting brighter and more noticeable. It’s rising in the middle of the night in January, and, around daybreak, shines at or near
its highest point in the sky. Mars, in front of the constellation Virgo the Maiden, shines close to the star Spica on the sky’s dome in January. It is already brighter than Spica. It’ll get
brighter still as Earth sweeps from from behind Mars in our smaller and faster orbit around the sun, causing the distance between our two worlds to decrease.




Next time to let the moon help you identify Mars: February 18 and 19. This chart shows a late-night view on February 18.



February, 2014. Mars is still in front of Virgo, still near the bright star Spica. By early February, Mars is rising in the east around 11 p.m. local time (the time on your clock, no
matter where you are on the globe). By late February, it’s coming up around 10 p.m. local time. Mars reaches its highest point for the night about one hour before dawn in early February and
about two hours before dawn late in the month. Summer solstice in the Mars’ northern hemisphere takes place on February 15.


March, 2014. In March, Mars is in Virgo, near Spica, still. Mars will be rising in mid-evening in March, becoming much more conspicuous in our sky. It’ll begin retrograde motion on
March 1, a sure sign that its opposition is approaching.


April, 2014. At opposition on April 8, 2014, Mars in Virgo, will
be opposite the sun in Earth’s sky. The sun, Earth and Mars will be located along a line in space, as viewed from above. As seen in Earth’s sky, Mars will be rising in the east when the sun
is setting in the west. It’ll be bright! And it’ll be fiery red in color. April will be the best month in 2014 to view Mars through a telescope because then Earth and Mars will be closest
together, and Mars will appear biggest through the eyepiece of your ‘scope. In April 2014, the north pole of Mars will be tilted 22 degrees toward Earth. It’ll be summertime in that
hemisphere of Mars, and Mars polar cap will be shrinking in size.


Follow Mars throughout 2014 with EarthSky’s guide to the five
visible planets – updated monthly.




In April 2014, Mars (fourth orbit) and Earth (third orbit) will be on the same side of the sun. Earth will be passing between the sun and Mars. The distance between our two worlds will be



neo 27/01/2014 17:19


http://earthsky.org/astronomy-essentials/why-is-mars-sometimes-bright-and-sometimes-faint?utm_source=EarthSky+News&utm_campaign=42f600e262-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-42f600e262-393511181


By EarthSky in
FAQs | Astronomy Essentials | Space on Jan 25, 2014









Why is Mars sometimes bright and sometimes faint?








Photo Credit: jasonb42882











The brightness of Mars in our sky depends on where our two planets are in orbit around the sun.


















At the center of these diagrams is the sun (yellow dot). Mars (fourth orbit from the sun) started its current cycle of visibility in Earth’s sky in June, 2013. At that time, Earth (third
orbit from the sun) was just rounding the far side of the sun, as seen from Mars, giving us a line of sight to the planet. Image via Fourmilab.





In April 2014, Mars (fourth orbit) and Earth (third orbit) will be on the same side of the sun. Earth will be passing between the sun and Mars. The distance between our two worlds will be
least for this two-year period. That’s why April is the best month in 2014 for viewing Mars. Image via Fourmilab.



Mars is the world orbiting the sun one step outward from Earth’s orbit. Earth takes one year to orbit the sun once. Mars takes about two years. The orbits of Earth and Mars are the reason
Mars is one of the most fascinating planets to watch in our sky, and they are the reason Mars is sometimes bright and sometimes faint.


When to see Mars in 2014


The brightness of Mars in our sky depends on where our two planets are in orbit around the sun. Sometimes Earth is close to Mars, and sometimes we are far away.


We are relatively close – and Mars appears at its brightest in our sky for that two-year period – every time Earth passes between the sun and Mars. At this time, Mars appears at
opposition – opposite the sun in our sky – rising in the east when the sun sets in the west. Oppositions of Mars recur about every two years and 50 days.


So Mars alternates in appearing bright and faint in our sky. It’s bright in the years we pass between Mars and the sun. It’s faint in the years in between, when Mars lies far across the solar
system from Earth – at times hidden from our view by the sun itself.


In 2013, Mars was in conjunction with the sun (behind the sun as seen from Earth) on April 18. It came back to visiblity in Earth’s sky around the end of June, when Earth had rounded the sun
as seen from Mars, giving us a line of sight to the planet.


In 2014, Earth will pass between the sun and Mars on April 8. At that time, Mars will be relatively close to us then, and it will appear as a bright reddish “star” in our night sky, rising in
the east while the sun is setting in the west. Mars is excellent to view through April 2014. It’s pretty good in March, May and June, too! And it’ll be a charming companion to the beautiful
skies of July and August, 2014. By September 2014, Mars will be getting very faint again – inconspicuous. It’ll be exceedingly faint and low in the southwest when 2014 ends.


Mars will also come close in May 2016 and July 2018. And so it will be close and bright every two years for billions of years to come!


Bottom line: Mars is bright when it and Earth are on the same side of the sun. It’s faint when it and Earth are on opposite sides of the sun. 2014 is a good year to see Mars.




MORE FROM EARTH SKY



When to see Mars in 2014  




Star of the week: Betelgeuse will explode someday  




Infrared image of Saturn’s rings  




Video: The known universe




January 2014 guide to the five visible
planets





 






 

neo 27/01/2014 17:18


http://earthsky.org/science-wire/largest-asteroid-venting-water-vapor-into-space?utm_source=EarthSky+News&utm_campaign=42f600e262-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-42f600e262-393511181


 




Largest asteroid Ceres is venting water vapor into space




This is the first unambiguous detection of water vapor around an object in the asteroid belt.






An artist’s concept of Ceres with vaporous jets in the asteroid belt. Image credit: ESA/ATG medialab



Scientists using the Herschel Space Observatory have made the first definitive detection of water vapor on the largest and roundest object in the asteroid belt, dwarf planet Ceres. Ceres is
located in the main asteroid belt, between the orbits of Mars and Jupiter.


The scientists say that Ceres possesses significant quantities of water ice on or below its surface that gets heated by solar energy, shooting plumes of water vapor out into space.


For the last century, Ceres was known as the largest asteroid in our solar system. But in 2006, the International Astronomical Union, the governing organization responsible for naming
planetary objects, reclassified Ceres as a dwarf planet because of its large size. It is roughly 590 miles (950 kilometers) in diameter. When it first was spotted in 1801, astronomers thought
it was a planet orbiting between Mars and Jupiter. Later, other cosmic bodies with similar orbits were found, marking the discovery of our solar system’s main belt of asteroids.


Scientists believe Ceres contains rock in its interior with a thick mantle of ice that, if melted, would amount to more fresh water than is present on all of Earth. The materials making up
Ceres likely date from the first few million years of our solar system’s existence and accumulated before the planets formed.


Until now, ice had been theorized to exist on Ceres but had not been detected conclusively. It took Herschel’s far-infrared vision to see, finally, a clear spectral signature of the water
vapor. Michael Küppers of ESA in Spain is lead author of a paper in the journal Nature. He said:



This is the first time water vapor has been unequivocally detected on Ceres or any other object in the asteroid belt and provides proof that Ceres has an icy surface and an atmosphere.



The results come at the right time for NASA’s Dawn mission, which is scheduled to arrive at Ceres in the spring of 2015, where it will take the closest look ever at its surface.


Read more from NASA





MORE FROM EARTH SKY



What’s a safe distance between us and an exploding star?  




See a winding river of stars called Eridanus  




Images of closest supernova in years, in galaxy M82  




When is the next supermoon?




Earth’s shadow from Austin, Texas







neo 27/01/2014 17:17


http://earthsky.org/tonight/waning-moon-and-venus-couple-up-before-sunrise-january-28?utm_source=EarthSky+News&utm_campaign=42f600e262-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-42f600e262-393511181


 



Waning moon and Venus before sunrise January 28













Tonight for January 27, 2014


Courtesy U.S. Naval Observatory







Simulated image of the planet Venus as seen through the telescope on January 28, 2014. Venus passed between the Earth and sun on January 11. Its day side is still facing mostly away from us.
On January 28, Venus’ disk appears from Earth as 9.7% illuminated by sunshine. Simulated image via US Naval
Observatory



The brightest and second-brightest luminaries of nighttime – the moon and the planet Venus, respectively – will be putting on quite a show in the early morning hours on January 28 and 29, 2014.
No matter where you live worldwide, get up some 90 to 60 minutes before sunrise. Look in the direction of the coming
sunrise to observe the moon and Venus.


Not too late. Order your 2014 EarthSky Lunar Calendar today!


A planisphere is virtually indispensable for beginning stargazers. Order your EarthSky Planisphere today!


If your sky is clear, there is no way to overlook Venus, the most brilliant of planets, in the predawn and/or dawn sky. Look first for the thin waning crescent moon, and then seek for the exceptionally bright star-like object in close vicinity to the moon. Despite
their brightness as seen from Earth, neither moon nor Venus produce any light of their own. They shine with reflected sunlight.


What’s more, both the moon and Venus show the whole range of phases in Earth’s sky. If you observe Venus in a telescope at dawn tomorrow (January 28), you’ll see that the crescent phase of
Venus very much resembles that of tomorrow’s waning crescent moon.


Yet, while the moon is waning toward the new phase (and the second new moon for January), the crescent Venus is waxing
toward full as seen from Earth. In fact, the moon will turn new on January 30, to usher in the second supermoon of
January 2014. At new moon, the moon will leave the morning sky and pass into the evening sky.


Venus, on the other hand, won’t reach full phase until October 25, 2014. At this time, Venus will transition out of the morning sky and into Earth’s evening sky.


Bottom line: Be sure to catch the beautiful pairing of the moon and Venus before sunrise on January 28 and 29, 2014. You’ll find them in the sunrise direction, before dawn. Although the moon
will leave the morning sky a few days from now, Venus will remain the dazzling morning “star” until October 2014.


Second supermoon of the month falls on January 30, 2014


Looking for a sky almanac? EarthSky recommends.



Bruce McClure




MORE FROM EARTH SKY



January 2014 guide to the five visible planets  




Mercury becoming visible in January 2014 evening sky
 




See the Unicorn tonight, moon and Mars after
midnight  




Catch young moon and Mercury after sunset February 1




Moon, Venus again light up the morning dawn on January 29








neo 27/01/2014 17:17


http://earthsky.org/space/what-is-a-supermoon?utm_source=EarthSky+News&utm_campaign=42f600e262-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-42f600e262-393511181


 


 


By Bruce McClure in
FAQs | Human World | Space on Jan 23, 2014









When is the next supermoon?








Expect high tides around Jan. 1 and 30, 2014











The January 30 supermoon won’t be a full moon. It’s a new moon. Some are calling it a Black Moon, but that name doesn’t come from astronomy. Watch for slightly
higher-than-usual tides.
















According to the definition of supermoon coined by an astrologer, Richard Nolle, over 30 years ago – and popularized only in the past few years – the year 2014 has a total of five
supermoons. They are the two new moons of January, and the full moons of July, August and September. January 1, 2014 was the year’s first supermoon, and January 30 will be
the second. We’ve heard people call this second new moon a Black Moon, but that name doesn’t come from astronomy either. Still, like any supermoon, the January 30 supermoon will have an
effect on Earth’s oceans. Expect large tides. We won’t have a single calendar month with two supermoons again until January 2018. Follow the links below to learn more about the supermoons of
2014, about what makes a moon a supermoon, and more.


What
is a supermoon?


What
is a Black Moon?



How many supermoons in 2014?


Spring
tides accompany January 2014′s supermoons.



What did astronomers call these moons before we called them supermoons?



Closest full supermoons in the years ahead




About three or four times a year, the new or full moon coincides closely in time with the perigee of the moon—the point when the moon is closest to the Earth. These occurrences are often
called ‘perigean spring tides.’ The difference between ‘perigean spring tide’ and normal tidal ranges for all areas of the coast is small. In most cases, the difference is only a couple of
inches above normal spring tides. Image and caption via NOAA.





Photographs or other instruments can tell the difference between a supermoon and ordinary full moon. The supermoon of March 19, 2011 (right), compared to an average moon of December 20,
2010 (left). Image by Marco Langbroek of the Netherlands via Wikimedia Commons.



What is a supermoon? We confess: before a few years ago, we in astronomy had never heard that term. To the best of our knowledge, the term supermoon was coined by
the astrologer Richard Nolle over 30 years ago. The term is only now coming into popular usage. Nolle
has defined a supermoon as:



… a new or full moon which occurs with the moon at or near (within 90% of) its closest approach to Earth in a given orbit.



That’s a pretty generous definition and allows for many supermoons. The first supermoon, for 2014, came on New Year’s Day, with the January 1 new moon, and the second is on January 30. By
this definition, according to Nolle:



There are 4-6 supermoons a year on average.



How many supermoons in 2014? By Nolle’s definition, the new moon or full moon has to come within 361,863 kilometers (224,851 miles) of our planet, as measured from the centers of the moon and
Earth, in order to be considered a supermoon.


Therefore, the year 2014 gives us a total of five supermoons: two January new moons, and the full moons of July, August and September.


The full moon on August 10, 2014, will present the closest supermoon of the year (356,896 kilometers or 221,765 miles).


However, the new moons on January 1 and January 30 are not far behind, featuring the year’s second-closest and third-closest supermoons, respectively. On January 1, the moon turned new less
than 10 hours before reaching lunar perigee – the moon’s closest point to Earth in its orbit. On January 30, the moon will turn new nearly 12 hours after reaching lunar
perigee.


Want more detail? Okay. In 2014, the moon comes closest to Earth on August 10 (356,896 kilometers), and swings farthest away some two weeks before, on July 28 (406,567 kilometers). That’s a
difference of 49,671 kilometers (406,567 – 356,896 = 49,671). Ninety percent of this 49,671-figure equals 44,703.9 kilometers (0.9 x 49,671 = 44,703.9). Presumably, any new or full moon
coming closer than 361,863.1 kilometers (406,567 – 44,703.9 = 361,863.1) would be “at or near (within 90% of) its closest approach to Earth.”


Assuming I figured everything correctly, that gives us our 5 supermoons of 2014: two new moon supermoons (January 1 and 30) and three full moon supermoons (July 12, August 10 and September
9).


However, the perigee full moon on August 10 will give us the most “super” supermoon of them all!


What is a Black Moon?


neo 26/01/2014 18:14


http://earthsky.org/space/images-of-closest-supernova-in-years-in-galaxy-m82?utm_source=EarthSky+News&utm_campaign=918a92c106-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-918a92c106-393511181


 


Bsr Damien ,


tu mets mes 3 posts où tu veux hein ...


Fatigué ce soir ,


pas le tps de finasser,


dsl .


Bonnes soirée et semaine,


-,)


 


By Deborah Byrd in
Blogs | Photos | Space on Jan 23, 2014









Images of closest supernova in years, in galaxy M82








By Thomas Wildoner











You’ll understand why astronomers say a supernova can outshine a whole galaxy.
















Amateur astronomers are capturing the first images of the supernova, or exploding star, in the famous galaxy Messier 82 (M82), which appears along our line of sight to the famous Big Dipper
asterism. The first to recognize the supernova, it seems, was a team of students at the University College London Observatory, inside the London city limits, on January 21, 2014 (view press release). It is bright enough to be visible in small telescopes, and it’s apparently still
getting brighter. It’s well placed for viewing in the evening hours.


M82 is a near neighbor in our vast universe of galaxies. This is the closest supernova in years, at 11 or 12 million light-years away. Hopefully, it goes without saying that there is no danger. Members of the EarthSky community captured the images below. Enjoy thinking about this vast explosion in space,
which actually happened millions of years ago. We are only now seeing its light.




Our friend Mike Hankey sent in this photo, which he took this morning (January 23, 2014). He said it was a relatively long exposure, of 3.5 hours. See image below this one to identify which
star is the supernova. Thank you, Mike! Visit Mike’s AstroPhotos





View larger. | Thomas Wildoner captured these before-and-after images of M82. See the
supernova? Thank you, Thomas! Photo details: 90 second exposures using a Canon T4i and Canon EF400mm f/5.6L USM lens at ISO 800. The camera was mounted on a ZEQ25GT mount from iOptron.





View larger. | Scott MacNeill at Frosty Drew Observatory captured these before-and-after
images of the galaxy M82 this month. The one on the right shows the supernova. Thank you, Scott!





View larger. | Greg Hogan said, “I can’t believe I pulled it off, but here is M82
with new Supernova PSN 095542. Very exciting to be able to catch this with my modest setup. Meade ETX80/Canon 7D. 80X2sec Stacked 18 DARKS.” Thanks, Greg!





M82 (Cigar Galaxy) is nearly always mentioned with another object, known as M81 (Bode’s Nebula). Here are the two M-objects together (M82 is on the left). Our friend Ken Christison captured
this beautiful image this morning (January 23, 2014). He said it’s a stack of 15 images of 30 seconds.



Some are saying this is the nearest supernova since Supernova 1987A in the Large
Magellanic Cloud. However, there was another supernova, Supernova 1993J, in M81 some 20 years ago. The supernova’s
preliminary designation is PSN (Preliminary Supernova) J09554214+6940260. Expect a better name soon! Skyandtelescope.com reports:



A spectrum reported by Yi Cao and colleagues (Caltech) suggests that the supernova may still be two weeks away from reaching its peak brightness. The spectrum shows it to be a Type Ia
supernova — an exploded white dwarf — with debris expanding at 20,000 kilometers per second. It is reddened, and hence must also be dimmed, by dust in M82 along our line of sight.



You need a telescope to see the supernova, so check with your local science or astronomy club. Some may be having
impromptu star parties in its honor. M82 is well up in the northeastern sky by 7 or 8 p.m. (for observers at mid-northern latitudes). The waning gibbous moon doesn’t rise until much later.


Read more at skyandtelescope.com




MORE FROM EARTH SKY




Perseid fireballs are already arriving!  




Egyptologists discover 17 new pyramids  


yamp 26/01/2014 18:12


salut,on habite a 300 m de l'ariege ,la riviere,hier petite frayeur ,elle est redescendu ,mais demain et mardi reflotte ,on va voir ..!

Ferlinpimpim 27/01/2014 10:42


Salut, j'espère que ça va se calmer.... Mais ça commence bien mal, cette année....


neo 26/01/2014 18:12


http://earthsky.org/space/video-the-known-universe?utm_source=EarthSky+News&utm_campaign=918a92c106-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-918a92c106-393511181


 


By Deborah Byrd in
Blogs | Videos | Space on Jan 22, 2014









Video: The known universe

















Check out a video simulation of the known universe, as mapped through astronomical observations.
















This wonderful video comes from the American Museum of Natural History in New York. It’ll help you experience the awesome scale of the known universe, as mapped through astronomical
observations. You start at the Himalayas, move through Earth’s atmosphere and the black of space to the afterglow of the Big Bang. Need perspective? This video is for you.


Thanks, Chelynne Campion! Via upworthy.com.




MORE FROM EARTH SKY



If you want to live longer, do nothing  




Earth’s shadow from Austin, Texas  




Third-ever photo of Earth from outer solar system
today  




Did China test a new hypersonic glide vehicle?




Best photos of Venus and Saturn after sunset







neo 26/01/2014 18:11


By Bruce McClure in
FAQs | Human World | Space on Nov 22, 2013









What is a Blood Moon?








Lunar eclipse illustration courtesy of Luc Viatour











Want to know the dates for the Blood Moons and total lunar eclipses in 2014 and 2015? You’ve come to the right place …
















We have been receiving a number of inquiries about some upcoming Blood Moons in the years 2014 and 2015. And we want to say, first of all, that the Blood Moons most people are asking
about are not part of astronomy. Instead, their origin is religious, at least according to Christian pastor John Hagee, who wrote a 2013 book about Blood Moons. More about that
below. Still, since they’re moons, and since people are asking us, we wanted to reply.


Follow the links below to learn more about Blood Moons.



Blood Moons in astronomy



Dates of Harvest and Hunter’s Moons in 2014 and 2015



Blood Moons in Biblical prophecy



Dates of Biblical prophecy Blood Moons in 2014 and 2015



How common is a tetrad of total lunar eclipses?



Why is the term Blood Moon being used to mean a full moon of a lunar tetrad?




View larger. | Hunter’s Moon collage from EarthSky Facebook friend Kausor Khan in
Hyberabad, India. Notice that she choose reddish moons to depict the Hunter’s Moon. That’s because many people see the Hunter’s Moon low in the sky, and moons seen low in the sky appear
reddish. In 2013, the Hunter’s Moon – sometimes called the Blood Moon – came in mid-October.





Why is a Hunter’s Moon linked in people’s minds with a red moon? First of all, in autumn, the angle of the ecliptic – or sun and moon’s path – makes a narrow angle with the horizon. Image
via classicalastronomy.com.





Secondly, the narrow angle of the ecliptic means the moon rises noticeably farther north on the horizon, from one night to the next. So, every autumn, there is no long period of darkness
between sunset and moonrise. Around the time of full moon, many people see the moon low in the sky, around the time of twilight. At that time, the moon often looks reddish. Image via
classicalastronomy.com.



Blood Moons in astronomy. In astronomical lore, all the full moons have names. The
names typically coincide with months of the year, or seasons.


One of the most famous moon names is the Hunter’s Moon. It is the the full moon immediately following the Harvest
Moon, which is the full moon occurring most closely to the autumnal equinox.


The Hunter’s Moon, in skylore, is also sometimes called the Blood Moon. Why? Probably because it’s a characteristic of these autumn full moons that they appear nearly full – and rise soon
after sunset – for several evenings in a row. Many people see them when they are low in the sky, shortly after they’ve risen, at which time there’s more atmosphere between you and the moon
than when the moon is overhead. When you see the moon low in the sky, the extra air between you and the moon makes the moon look reddish. Voila. Blood moon.


Dates for the Northern Hemisphere’s Harvest and Hunter’s Moons in 2014 and 2015:



2014:
Harvest Moon: September 9
Autumn Equinox: September 23
Hunter’s (Blood) Moon: October 8


2015:
Autumn Equinox: September 23
Harvest Moon: September 28
Hunter’s (Blood) Moon: October 27





This book, published in 2013, is apparently what launched all the questions to our astronomy website about Blood Moons. We confess. We haven’t read it.



Blood Moons in Biblical prophecy. We’re not experts on prophecy of any kind. But we’ll tell you what we know about the new definition for Blood Moon that has caused so many
questions recently.


From what we’ve been able to gather, two Christian pastors, Mark Blitz and John Hagee, use the term Blood Moon to apply to the full moons of the upcoming tetrad – four
successive total lunar eclipses, with no partial lunar eclipses in between, each of which is separated from the other by six lunar months (six full moons) – in 2014 and 2015. John Hagee
appears to have popularized the term in his 2013 book Four Blood Moons: Something is About to Change.


Mark Blitz and John Hagee speak of a lunar tetrad as representing a fulfillment of Biblical prophecy. After all, the moon is s