Thursday, January 31, 2008

Planetary Collision!!!

Well, not really, but it sure looks like a close one! Check out the pre-dawn sky the next few mornings. Look SE. The two brightest planets, Venus and Jupiter will be right next to each other near the horizon. Read this article and see how your eyes make this celestial spectacle even better: http://science.nasa.gov/headlines/y2008/29jan_venusjupiter.htm

Here's how it looked this morning: http://www.spaceweather.com/
This weekend it will be even more spectacular with the crescent moon moving nearer to the planets.
"Scorpius rose this morning holding a plump crescent moon gently in his claws, while Jupiter and Venus met in the brightening light of dawn." - Bill Gucfa, Rehoboth, MA

Enjoy by Jove!
The Dorr Museum of Natural History

Friday, January 25, 2008

A Little Night Music

Shivery Greetings,
This cold weather brings clear sparkling skies at night. Before you go out after dark, check out this very fun tutorial for finding Orion, the Big Dipper and Cassiopeia. If you are an advanced stargazer, just look at the very first page all-sky shot and see how many constellations and stars you can name. http://www.quietbay.net/Science/astronomy/nightsky/

I know the bright stars blazing in east and overhead will certainly catch your eye. The brightest stars form a giant hexagon across the sky, known as the Winter Hexagon, formed (conveniently) by 6 constellations.

The brightest star visible to earthlings, Sirius, in Canis Major, shines bright blue; Capella, in Auriga, is golden; Aldeberan, eye of Taurus the Bull glows red. Inside the hexagon Orion's supergiant Betelgeuse is as orange, but not quite as bright as Mars which is now also inside the Hexagon. Learn about stars of the Winter Hexagon here: http://homepage.mac.com/kvmagruder/bcp/aster/constellations/win6.htm

Sunday is Mozart's birthday, so celebrate by listening to Eine Kleine Nachtmusik inside: http://www.emusic.com/album/Wolfgang-Amadeus-Mozart-MOZART-Eine-Kleine-Nachtmusik-Serenata-Notturna-MP3-Download/10871676.html

But when you're outside star gazing, listen for A Little Night Music from courting coyotes, http://coyotim.tripod.com/coyote.htm
(scroll down and click on different vocalizations on left)

red foxes http://www.geocities.com/RainForest/4707/Sounds/yiff2.mp3


and Great Horned Owls. http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Great_Horned_Owl.html#sound
Valentine's day comes early for all of them!

Stay warm,
The Dorr Museum of Natural History

Wednesday, January 16, 2008

Ballad of the Northern Lights

Today is birthday of the Canadian poet Robert Service who moved to Canada in 1897 and wrote ballads of life in the Yukon. Below are some aurora references excerpted from his "The Ballad of the Northern Lights". A strong solar wind is now blowing against Earth, causing high-latitude geomagnetic storms which produce auroras. If it intensifies a little, we can hope for northern lights in mid latitudes. Meanwhile enjoy his verse and dream of auroras to come....

Excerpts from
The Ballad of the Northern Lights
By Robert Service

Oh, it was wild and weird and wan, and ever in camp o' nights
We would watch and watch the silver dance of the mystic Northern Lights.
And soft they danced from the Polar sky and swept in primrose haze;
And swift they pranced with their silver feet, and pierced with a blinding blaze.
They danced a cotillion in the sky; they were rose and silver shod;
It was not good for the eyes of man--'twas a sight for the eyes of God.
It made us mad and strange and sad, and the gold whereof we dreamed
Was all forgot, and our only thought was of the lights that gleamed.

Oh, the tundra sponge it was golden brown, and some was a bright blood-red;
And the reindeer moss gleamed here and there like the tombstones of the dead.
And in and out and around about the little trail ran clear,
And we hated it with a deadly hate and we feared with a deadly fear.
And the skies of night were alive with light, with a throbbing, thrilling flame;
Amber and rose and violet, opal and gold it came.
It swept the sky like a giant scythe, it quivered back to a wedge;
Argently bright, it cleft the night with a wavy golden edge.
Pennants of silver waved and streamed, lazy banners unfurled;
Sudden splendors of sabres gleamed, lightning javelins were hurled.
There in our awe we crouched and saw with our wild, uplifted eyes
Charge and retire the hosts of fire in the battlefield of the skies.

And the Northern Lights in the crystal nights came forth with a mystic gleam.
They danced and they danced the devil-dance over the naked snow;
And soft they rolled like a tide upshoaled with a ceaseless ebb and flow.
They rippled green with a wondrous sheen, they fluttered out like a fan;
They spread with a blaze of rose-pink rays never yet seen of man.
They writhed like a brood of angry snakes, hissing and sulphur pale;
Then swift they changed to a dragon vast, lashing a cloven tail.
It seemed to us, as we gazed aloft with an everlasting stare,
The sky was a pit of bale and dread, and a monster revelled there.

Day after day was dark as death, but ever and ever at nights,
With a brilliancy that grew and grew, blazed up the Northern Lights.
They rolled around with a soundless sound like softly bruised silk;
They poured into the bowl of the sky with the gentle flow of milk.
In eager, pulsing violet their wheeling chariots came,
Or they poised above the Polar rim like a coronal of flame.
From depths of darkness fathomless their lancing rays were hurled,
Like the all-combining search-lights of the navies of the world.

There on the roof-pole of the world as one bewitched I gazed,
And howled and grovelled like a beast as the awful splendors blazed.
My eyes were seared, yet thralled I peered through the parka hood nigh blind;
But I staggered on to the lights that shone, and never I looked behind.
Some say that the Northern Lights are the glare of the Arctic ice and snow;
And some that it's electricity, and nobody seems to know.
But I'll tell you now--and if I lie, may my lips be stricken dumb--
It's a mine, a mine of the precious stuff that men call radium.

(Robert Service may have dreamed of getting rich mining radium and gold, but we now know that the northern lights are excited gases glowing in the upper atmosphere, just like giant, wild neon lights.)


For some really cool photos, legends and science about the aurora, check out:

Monday, January 14, 2008

Aurora Alert

Snowy Greetings,
It's becoming hard for me not to believe that there's a connection between active northern lights and cloudy skies. It seems that almost every time the aurora is active and the auroral oval shifts far enough south for us Mainers to see it, it's either snowing, raining or completely overcast. In the photo, from the excellent website, spaceweather.com, the northern lights are real, but the polar bears are made of snow.

So, guess what: Active Aurora forecast for tonight! visible at mid-latitudes. So, if by chance there's a break in the clouds, look up for swirls of green.


I'm glad that winter is back, but this weekend several spring-like signs were reported:
chipmunks roused from hibernation and were seen eating below bird feeders
skunks were out and active
a noctuid (owlet moth) caterpillar was out roaming around on the snow.


Enjoy the snow and good luck getting a peek at the aurora.

The Dorr Museum of Natural History

Friday, January 11, 2008

January Thaw

Is our January thaw giving you spring fever? It's only January 11th, but it's raining, thundering and lightning. Warm temperatures, wind and rain has melted most of the snow on MDI, but further inland Eastbrook still has about 8 inches on the ground.


Well, if you have spring fever you're not alone. On Monday a poor yellow spotted salamander was seen crossing the road near Sand Beach bewildered when he blundered into a snowbank on the other side!


Crows have been perching in pairs, presumably pre-courtship behavior. Owls are calling to their mates at night. Leaf-footed bugs, flies and ladybugs have all been roused from their winter torpor and can be seen flying around outside.


But don't lose heart, winter will be back bringing lovely snowfalls, frozen ponds and flocks of birds to your feeders.


Enjoy the thunderstorm!
The Dorr Museum of Natural History

Thursday, January 3, 2008

Happy Perihelion Day!


Happy New Year!
Today is perihelion, the day earth is closest to the sun all year. Can't you just feel the warmth? It was 5 below zero at my house this morning! Our elliptical orbit around 'ol Sol brings us 3% closer each January. Of course the seasons have nothing to do with this change of a mere 4 million miles, but are due to the tilt of the earth toward or away from the sun. In winter your hemisphere points away from the sun, bringing less daylight and much less concentrated heat. Check out this cool animation of earth's orbit. Notice how we are moving faster as we swing closer to the sun (just like spacecraft whipping around a planet for extra speed), so hang on! http://www.windows.ucar.edu/tour/link=/physical_science/physics/mechanics/orbit/perihelion_aphelion.html&edu=high
If it's any consolation, since we move slower in summer, that season lasts longer. Summer's dandy, but winter's quicker.

This cold clear weather following our record-breaking snows brings with it many delights. At least they are delightful to me, it's like the winters of my childhood. Blizzards followed by snow days followed by stingingly cold brilliant days and crisp starry nights. I have over 3 feet of snow at home, my car was totally buried into invisible oblivion yesterday. The only other time I've experienced that was returning to West Yellowstone after ten days cross-country skiing in the park. New England hasn't had this much snow in 100 years!

Cold weather preserves the quali or snow stuck on branches, transforming forests into a true winter wonderland! http://derek.gardenbuddies.com/gallery/albums/winter/mapleroad.jpg
The wet heavy snows fell during moderately warm temperatures giving snow crystals a chance to grow gloriously large. Sparkling stellar crystals, the classical 6 armed stars, danced in profusion locking arms to become giant snowflake http://www.its.caltech.edu/~atomic/snowcrystals/class/class.htm
Both stellar and plate (smooth hexagonal) crystals reflect light off their mirrored faces, sparkling like diamonds in sunlight. Last night, arriving home in the dark and using my pen flashlight to navigate between snow drifts, the dazzling reflections from the snow banks were dizzying. It was like trying to walk with a strobe light flashing. How wonderful! Blazing stars overhead, equaled in their splendor by constellations of glimmering snowflakes below!

Very cold air meeting relatively warm sea water creates sea smoke, those wispy ethereal clouds rising from Frenchman's Bay, bequeathing a real air of mystery! Enjoy sea smoke's transformation of snow clad trees near the water. At high tide sea smoke melts quali which quickly re-freezes into ice. In the sunlight icy trees sparkle like giant crystal chandeliers. Trees in direct sunlight all day may become iced too.

Enjoy the cold, snow and ice AND your warm cozy home at night! For some great reading about all the different kinds of snow and how snow pack affects animals, check out "The Secret Language of Snow" by Terry Tempest Williams and Ted Major. http://www.coyoteclan.com/books/snow.html
Sadly it is out of print. A great kids book, with enough detail, science and terminology for adults too, is "Who Lives in the Snow" by Jennifer Berry Jones. http://www.acornnaturalists.com/store/product1.aspx?Category_ID=520&Product_ID=605
We have that book in the museum shop and it has amazing artwork exploring the wonders of snow revealing secrets of the subnivean world.

If you venture out to look at the stars tonight, keep your eyes peeled for shooting stars. The Quadrantid Meteor shower peaks tonight with about 50 meteors per hour. The radiant is near the end of the handle of the Big Dipper. Blazing bright in the southern sky, Orion will surely catch your notice. Check out this star map of the "Winter Hexagon" and see if you can find all the brightest stars. http://images.google.com/imgres?imgurl=http://www.richardbell.net/Images/hexagon.gif&imgrefurl=http://www.richardbell.net/winter.html&h=497&w=504&sz=23&hl=en&start=5&um=1&tbnid=_PzPMpuzE0y6MM:&tbnh=128&tbnw=130&prev=/images%3Fq%3Dwinter%2Bstars%2BOrion%26svnum%3D10%26um%3D1%26hl%3Den
Mars will be shining bright orange just above Orion's head, half-way between orange super giant Betelgeuse and golden Capella.

Warm regards,
The Dorr Museum of Natural History