Showing posts with label Milky Way. Show all posts
Showing posts with label Milky Way. Show all posts

Wednesday, October 2, 2013

THE OWL CLUSTER... or is it?

Last month I wrote about the constellation Cassiopeia the Queen.  September is generally the time where we have most number of clear nights in Cincinnati and I've been seeing a lot of Cassiopeia.  When I aim my telescope or binoculars at the "W" shape I always see more stars than I bargained for.

When you look at Cassiopeia you are really peering into a thicker patch of stars that is really plane of our galaxy, the Milky Way.  From cities, you can't see the Milky Way at all but binoculars and telescopes allow you to cut through the light pollution and see a lot of stars.

One of my favorite little star clusters is there too.  It's informally called the Owl Cluster because so many people can picture a bird in this clump of stars.  The two brightest stars are the eyes, a group of stars make up the body and little claws while another group look like outstretched wings.  Can you see it in the picture?

Other people use their imaginations differently.  They see E.T., the Extra Terrestrial from the Steven Spielberg movie.  And others think the wings give it more of a bat shape.

The cluster was first charted by William Herschel in 1787 but he didn't say what it looked like to him.  So create your own mythology with this little cluster.  
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Friday, August 23, 2013

SAGITTARIUS THE ARCHER

August evenings are the best time to find part of this constellation low in the southern skies.  Sagittarius represents Chiron the Centaur, who is half man, half horse. Chiron was a great teacher of just about everyone in ancient Greece including Hercules.

Just after sunset you should see medium-bright stars that resemble a tea pot or coffee pot.  That's his body, out-stretched arm, bow and arrow.  Let you imagination figure that one out!

The constellation can be broken up into two smaller sections. The four stars that make up the very tiny dipper are also called the Milk Dipper because they lie in a thick patch of the Milky Way. Unfortunately, we have to go way out in the country to see this dipper scooping up milk. When you peer at Sagittarius, you are looking at the center of our galaxy. Imagine being in the center of the Milky Way - there would be so many stars nearby that night might be as bright as day.  And you might have to watch out for black holes!

The other part of Sagittarius is his bow and arrow. Three stars curve to form the bow and one sticks out to the right forming the arrow. Look at what he’s aiming that arrow at! It is aimed directly at the Scorpion’s heart, the red star Antares. But I still think the whole thing looks more like a coffee pot than a Centaur.

Try to find Sagittarius’ second brightest star. It was named Nunki about 5000 years ago by the Sumerians, but today we have no idea what Nunki means. Since the translation is lost to history you should invent your own for this blue-white, mystery star.

Friday, August 3, 2012

Cygnus the Swan

Cygnus the Swan is also known as the Northern Cross since it resembles, well, a cross. It is mostly a summer constellation but does appear standing up on Christmas evenings (as a symbol for the season).  Look for the Swan inside the Summer Triangle.

Deneb is one big star
The swan is located in a rich part of the Milky Way. In some cultures, they considered the Milky Way to be the river in the sky and the swan, a water bird, is naturally flying along it. The Milky Way appears to split near the brightest star Deneb which means “Tail” in Arabic.  Deneb is the farthest star you can see with the naked eye - around 3,000 light years away!

One Greek legend says that the big cheese himself, Zeus, fell in love with a mortal woman named Leda (This was a regular thing for the romantic Zeus. In fact Leda was his third mortal crush that week!). Anyway Zeus decided that sending Leda flowers would be too boring. She deserved a more creative approach. After all she was the Queen of Sparta. So Zeus disguised himself as a swan to gain Leda’s love. This swan would appear at Leda’s window everyday and she thought, “My, there is something strange about that swan. He’s certainly not like the other swans. He seems more dynamic."

Zeus was saying to himself, "Yeah, baby.  I'm a swan.  Check me out." 

Maybe it was the feathers or the way he threw thunderbolts, but as strange as it sounds, Leda fell in love with the swan. Much to her surprise the swan turned back into Zeus and they lived happily ever after - until Zeus met someone else that next week.
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Tuesday, August 9, 2011

BEHIND THE SCENES AT STAR GAZER

Click for a "Supergiant"
Hey there Star Gazers...

I just finished filming the last classic Jack Horkheimer, Star Gazer episode.  This will air on the last Monday in September.  It's been a lot of fun filming down in Miami, Florida, standing and sitting on Jack's "light beam" and pointing out the stars and constellations.  So far I've filmed six months of shows.  But the best is when I'm sitting above red supergiant stars like Antares.  Keeps my feet warm!  You can watch my episode about the Milky Way on youtube.  Just right click and open this link in a new window: http://www.youtube.com/watch?v=8JalTY9D0gs 

Star Gazers
I'm happy to say that Star Gazer will continue - just in a new format.  It'll be called Star Gazers featuring me and James Albury from the Kika Silva Pla Planetarium.  We'll be filming these shows in three weeks and they'll start airing at the same time, same channel, new website, on October 3.  We'll also be joined by Marlene Hidalgo who will be doing some of the online programs.  I got a preview of the new opening for Star Gazers and IT IS AWESOME. 


A huge thanks go to Jack and everyone at WPBT2 in Miami for continuing the tradition.  Can't wait to begin the next generation of Star Gazers.  Keep looking up!
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Tuesday, June 14, 2011

Virgo the Maiden

As Spring turns to Summer, the constellation Virgo reclines in the south after sunset. Virgo is lying on her back holding an ear of wheat in one hand and a dove of peace in the other. It's difficult to make out her silhouette in the sky - many of the stars are dim, and really don’t look much like a maiden. But her brightest star, Spica (pronounced SPY-ka), makes up for this obscurity. Spica is one of the most beautiful blue stars and easy to locate.

First find the Big Dipper in the northern sky. Trace down the arc of the handle and continue that curved line out in the sky. This should take you to a very bright, vaguely orange star called Arcturus. Now straighten out the line a little more and continue it until you hit Spica farther in the south. And there is Virgo. There is a catchy saying to remember all this. "Follow the arc to Arcturus then hit a spike to Spica." All right, it’s not that catchy...

The majority of the cultural myths - from Greece to India - describe Virgo as a maiden, virgin, or symbol of purity, innocence, and justice. The ancient Greeks likened her to the daughter of Zeus and the goddess of justice. She lays in the sky next to another zodiac sign, Libra the scales to mark her association with the scales of justice.

The ancient Egyptians thought Virgo represented the great goddess Isis. Isis had an ear of corn in her hand instead of wheat. Isis was the creator of the Milky Way, the band of fuzzy stars that form the heart of our galaxy, when she was up in the sky. One day, Isis was chased by a monster just as she was about to eat some corn. In the chase, she dropped the corn which scattered around the dome of heaven making the Milky Way - or should I say, "The Corny Way."

The Milky Way - Rightclick to open in new window
The Arabs initially included Virgo in a giant Lion constellation and some called it the Barking Dogs, but many groups seem to have changed it to conform with the Greek myths. Virgo is "Al Adhra al Nathifah," the Innocent Maiden.

And in India, the Hindus believe Virgo to be Kanya, the maiden and mother of the great Krishna.
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