Thursday, June 27, 2013

A Korean Star Myth with Aquila and Lyra

Once upon a time a cowherd fell deeply in love with a woman weaver. They would see each other so often that the cows were neglected and the spinning wheel scarcely turned. The father of the weaver became so enraged by this slacking off (even in the name of love) that he banished the couple into the sky.

Their love was so strong that they fell into the sky hand in hand as if gravitationally attracted. It looked as if they would finally be together until a flock of magpies flew in between the two. Their hands separated and their bodies glided slowly but surely away from each other.  The lovers struggled to reconnect but it was no use. When they stuck to the heavens, the weaver was on one side of the great river in the sky (The Milky Way) and the cowherd fell on the opposite shore. The cowherd turned into the stars Altair, Tarazed, and Alshain in the constellation Aquila - the weaver turned into Vega and stars in Lyra.

According to this Korean legend, the couple could meet only once a year on the seventh day of the seventh month. Only then could they cross the river because of the magpies. Magpies in Korea flocked like crazy in July - and to atone for their role in separating the lovers, flew up to the stars to build a bridge across the river.  Only then could the couple meet on the backs of the magpies.  In Korea, children were taught to stone any magpies they saw not helping build that bridge.

When the meeting occurs on the seventh day of the seventh month, Altair and Vega shine in 5 colors to symbolize their happiness. Unfortunately, if it rains on July 7th, the couple fails to meet at all. 

Look for Vega high in the east and Altair lower in the southeast after dark.  And check out the lovers on July 7th to see them shine happily.  

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Monday, June 17, 2013

SUPERMOON 2013

Not all moons are created equal.  The full moon on Saturday June 22, 2013 will appear bigger and brighter than any other moon this year.  But the question is, “Can you tell the difference?”

As the Moon orbits the Earth, it slowly changes its distance from us.  It varies from about 252,000 miles at its farthest, to around 220,500 miles at its closest.  When you combine the night when the full moon is also closest to us, that is called a SUPERMOON.


The Moon’s distance changes very slowly.  You can’t tell the difference from night to night.  But if you compare Saturday’s Supermoon to the farthest full moon, the so-called Wimpy Moon of January 15, 2014, the difference is dramatic.  The Supermoon is over 31,000 miles closer, appears 14% larger in diameter and 30% larger in surface area than the Wimpy Moon.  Open the picture above in a new window to see more details.

The best time to see the Supermoon is just as it rises.  In the Cincinnati area, the Moon will rise over the eastern horizon at 8:20pm.  You may have trouble seeing it right away since the sky won’t be completely dark.  Keep looking because as the Sun sets, the full Moon will rise.  The Moon always looks larger near the horizon but it’s merely an illusion.  Technically, the Moon will be over one thousand miles closer around 1:30am on Sunday morning when it will be higher in the south.  That would be the Super-est Moon.       

Since the changing Moon distance is a slow process, Sunday night will provide an encore.  The full moon rising at 9:20pm on June 23 will be less than 1% farther than that of June 22. 

Look for the Supermoon(s) this weekend and see if you can spot the difference.

Wednesday, May 29, 2013

CHANGING PLANETARY TRIANGLE

The planetary conjunction isn't over yet.  Venus, Jupiter, and Mercury will be hanging around in the west-northwestern sky for a few more days.  Last night I saw them less than 10 degrees above the horizon but could follow them all the way to sunset.  On the night of May 26th they made a perfect equilateral triangle as shown by the picture below.


Over the next few days, Venus and Mercury will appear higher at the same time of night while Jupiter sinks lower.  Venus is the brightest of the three, followed by Jupiter, and then Mercury.  Over the next few days Venus will slide between the other two turning the former triangle into a planetary lineup.  May 31 and June 1 they will be best aligned.  Jupiter will be at the bottom, Venus in the middle, and Mercury at the top.  Both Mercury and Venus and Venus and Jupiter will be separated by only 4 degrees.  On June 1, Mercury will be the closest of the three at about 95 million miles away, Venus is on the other side of the Sun from us still so it's about 151 million miles distant, while Jupiter is way out as usual - 567 million miles away.

Jupiter will be heading off into the sunset soon so don't miss it.  Mercury will hang around for a few more weeks and make a close conjunction with Venus on the night on June 18 and 19.  But Venus will be low in the evening skies for the next several months.  In fact, she'll be there even as you ring in the New Year 2014.

To see the planets you will need an extremely clear view to the west-northwest horizon.  No trees, buildings or anything can be in your way.  And you have to be there right after sunset.  Once the Sun sets you only have 30 minutes to catch the planets pop out from the sky glow before they set.

Happy Planet Hunting!
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Friday, May 24, 2013

COMA BERENICES - Berenice's Hair

So what is the deal with the Mop of Hair that was in the picture next to Bootes (see post from May 7)??? That's Berenice's Hair, a small, faint constellation visible in the spring and summer from really dark skies.

In Greek mythology Berenice was the beautiful Queen of Egypt known for her flowing tresses. When her husband went off to war, Berenice asked Aphrodite to protect her beloved in battle. In return, if he returned to her safely, she would cut off her long hair as a gift to the goddess. When the king returned unharmed to her side, Berenice stayed true to her word and lopped it all off. The hair was placed in the temple where it mysteriously disappeared. What cur took the Queen's beautiful hair? Who dared?

Heads were going to roll (not to mention hair), if the culprit was found. Luckily a court astronomer came to the rescue - he found the missing locks. The hair was such a pleasing sacrifice to Aphrodite that SHE took it and placed it in the sky for all to see. So now the glory a Berenice's hair has reached new heights and lives on in the stars.

You can best find this constellation in a very dark sky.  If you're far from city lights you can't miss the tangles of stars just to the right of Bootes and above Virgo.  Binoculars help too.  Scan the sky to the right of the bright star Arcturus and you should see a mass of stars.  Lots of locks!
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Friday, May 10, 2013

BOOTES and the PLOW

You may have noticed a lone bright star in the east after sunset. This is Arcturus, the brightest star in the constellation Boötes. This kite-shaped constellation first appears in the spring sky looking like a wide tie hanging from the invisible neck of an invisible businessman. Boötes is no yuppie bustling through traffic but a Herdsman, Bear-Driver, or Inventor of the Plow.

First let's talk about how to pronounce this constellation. It is a 3-syllable name; "Bo-oh-teez," not "Boots," and please never call him, "Booties."

One myth portrays Boötes as an inventive man who overcomes adversity. Once upon a time Bootes was walking through the woods - on his way to grandma’s house - when he was robbed by his brother. Not only that, when he returned home, he discovered that his good-for-nothing, thief-brother had taken possession of everything he owned. House. Land. Wife. Everything. Undaunted, Bootes finds a new place to live but is dead broke. He can’t rub one nickel together. As a poor farmer, he invents a plow that can be pulled by oxen. His invention spreads around the globe, and after patenting it, Bootes can afford anything. This story fits in extremely well with the old English view of the Big Dipper as a Big Plow. Boötes can be seen right behind the plow pushing it around the pole.

The easiest way to find Boötes is to find his brightest star, Arcturus. Nothing could be easier. First, find the handle of the Big Dipper and use it as a pointer. Follow the arc of the handle and continue this arc until you run into Arcturus. Remember the catchy saying, "Follow the arc to Arcturus," and you'll find Boötes.



This is Boötes as a Herdsman with his dogs. Next time I may tell you about the mop of hair under the dogs in this picture.
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Tuesday, April 23, 2013

Ursa Minor - The Baby Bear

Part II: The Bear Strikes Back!
(See the April 10th blog below for Part I)
"What happened next? What happened next?" the kids asked the ancient shaman.

The storyteller stared up from the fire, stroked his beard, sat up straight, and said, "After the hunter threw the momma bear up into the sky (becoming the constellation Ursa Major), he continued on down the path. Soon he passed some bushes on the edge of a great forest. The hunter heard a strange noise coming from the bushes that caused him to stop. The bushes were making a pathetic whimpering noise (insert whimpering here). Now normally bushes don't make whimpering noises so his curiosity made him part the branches to see... the saddest, most pathetic-looking Baby Bear.

"The Baby Bear had lost his mommy. 'Oh boy,' thought the hunter. 'I think I know where mommy might be...' After all, he just threw her up in the sky 10 minutes ago and there she was shining down on everyone. The hunter could not climb up to the sky to bring momma back so he decided the only thing to do was to... Throw the Baby Bear up in the Sky!


"So the hunter grabbed the Baby Bear by his short stubby tail and swung him around over his head. And soon the Baby Bear's tail began stretching and stretching until the hunter let go ----- whoosh! The baby bear flew up and stuck - SPLAT! - to the sky not far from his momma."

And that is how the Big and Little Bear got into the sky.
 
Look for the Big and Little Bear in the northern sky tonight.  The Big Bear is easy to see since it's very high in the northern sky during spring and summer and full of pretty bright stars.  The Little Bear is fainter so you might only be able to see a few its stars.  But one of these is the most important star in the sky...
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Thursday, March 28, 2013

The Big Dipper - Rutila Major (my bad Latin translation)


For the next few weeks we will be focusing on the northern sky and the stars that are up most of the year. This is a great time to find the Big Dipper. The seven unmistakable stars hang high in the northwest after sunset (upside-down). If you locate a dipper which one is it? Big or Little? If you live in or near a city - no need to fear. You can only see the Big Dipper. Four of the seven stars of the Little Dipper are too faint to see in a light polluted sky.

Different cultures imagined quite different pictures in these stars. In medieval Europe it was a death cart or wagon. Some Native American groups called it the "Thigh of an Ox" while others used it as a eye test (see if you can see an extra star hovering just above one of the seven). Egyptians called it a coffin. African Americans called it the "Drinking Gourd". In England they still call it The Plow.

Here is a very famous painting by Vincent van Gogh called "Starry Night over the Rhone". It's pretty obvious where the Big Dipper is. Van Gogh included stars in several of his paintings including Starry Night and Cafe Terrace at Night.
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If you have trouble seeing any of those things in the Big Dipper, try to modernize it. Maybe to you it will look like a lawn mower, shopping cart, or question mark. Don't ask me why that shopping cart is in a jacuzzi...
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