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How to find the Winter Hexagon

Introduction

Orion is the key for
cracking the winter sky

The winter sky is an excellent place to begin exploring the constellations that make up the night sky. Orion is the key, or signpost, for locating many of the other constellations in the winter sky. There are two convenient ways to locate all of the main constellations around Orion once Orion is located. Fortunately, Orion is easy to locate and well known to most people.

The first way is to follow lines made by pairs of stars in Orion. The second way is to locate the great winter hexagon of bright star around Orion.

The Constellations of the Winter Sky

If you live in the northern latitudes and you scan the sky from the southern horizon to the region overhead, you should be able to see the following constellations on a clear winter night: Orion the Hunter, Canis Major the Great Dog, Canis Minor the Little Dog, Taurus the Bull, Auriga the Charioteer, Gemini the Twins and the Pleiades star cluster. (See the map on the next page).

 In Greek mythology, Orion was a great hunter who eventually offended the gods, especially Apollo. Apollo tricked Artemis, the Goddess of the hunt, into shooting Orion on a bet. When she discovered that she had shot Orion, she quickly lifted him to the heavens and made him immortal, where he now hunts eternally with his two dogs, Canis Major and Canis Minor. In front of him is his prey Taurus the Bull.

 The myths surrounding Auriga the Charioteer vary, but it is an ancient constellation dating back to at least to the Ancient Greeks. Some say Auriga invented the chariot and others that he trained horses for the best chariots.

 Gemini is a constellation made up of two stick figures known as the twins, Castor, who was a great horseman, and Pollux, who was a great boxer. According to one myth, Castor and Pollux (a.k.a. Polydeuces) were the sons of Zeus and Leda (from Leda and the Swan) and were hatched from an egg. Their sister was the beautiful Helen whose face launched a thousand ships to do battle in front the Trojan city of Troy.

Method 1: Using Pairs of Stars in Orion as a Guide

Finding Sirius and Canis Major

If you follow a line from the belt stars of Orion to the left and slightly down, you will come across a very bright star called Sirius, which is also known as the Dog Star. (See the arrows in the diagram to the right).

Sirius is the brightest star in the night sky so it is hard to miss. Once you’ve located Sirius you can locate the other stars in the constellation Canis Major the Great Dog.

Finding Procyon and Canis Minor

Follow the a line from the shoulder stars of Orion to the left. The first bright star that you will come close to is Procyon, which resides in Canis Minor.

From there you should be able to see the other star that us easily visible. Together, the two stars make up the constellation Canis Minor, which is also known as the Little Dog. Along with Canis Major, Canis Minor follows Orion across the heavens on an eternal hunt.

Finding Aldebaran and Taurus

Following the belt stars to the right, you will pass just below the bright star Aldebaran and through the constellation Taurus, which is also known as the Bull.

Continuing on you will run across a fuzzy blur of stars closely grouped. These are the Pleiades, or the Seven Sisters.

Finding Capella and Auriga

Follow the bottom most star on the left and the left most belt star upwards (going roughly over your head) and you will come across a very bright star called Capella. From Capella, you can follow the pentagon of brighter stars nearby that make up Auriga. Just below Capella, there is a triangle of stars known as ‘the kids’ as in goat babies.

Capella was one of the most important stars for navigation as it could be seen throughout most of the year from mid northern latitudes.

Finding the Twins Castor and Pollux

Follow a line from Rigel to Betelgeuse heading upwards and overhead. You will come to two rough sticks of stars that are headed by two brighter stars. This is the constellation Gemini, composed of the twins Pollux and Castor. Pollux is on the left and Castor is on the right.

Method 1: Using the Winter Hexagon Centered About Orion

If you look in around the sky centered on Orion, you should be able to see a rough hexagon of very bright stars. This is called the Winter Hexagon. Starting at Rigel, if you go counterclockwise by one, you end up at Aldebaran in Taurus. Go counterclockwise once more and you end up at Capella in Auriga. Go counterclockwise once more and you end up at the pair of stars Pollux and Castor in Gemini. Go counterclockwise once more and you end up at Procyon in Canis Minor. Finally, if you go counterclockwise once more you end up at Sirius in Canis Major.

Credits: http://www.science-teachers.com

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Eyes on the Sky : January 2012

Eyes on the Sky: Jan 2 thru Jan 8

All about Auriga

The all-new “Eyes on the Sky” kicks off by focusing on Capella, Auriga, three stellar Messier objects within it, and the Quadrantid meteor shower. Joining the fun is a cameo appearance by none other than Mr. Charles Messier himself! (Did they have film back then? Nah, but this is what makes astronomy fun!) See what’s in the all-new format, as well as what’s ‘up’ in the night sky this week.

Chart 3 : GEMINI, AURIGA, PERSEUS

Eyes on the Sky Jan 9 thru Jan 15

Mars and the Moon

Mars and the Moon take center stage in this week’s video; Mars has increased in size to about 10 arc seconds across recently, and will reach opposition in early March. So now is a good time to start observing the Red Planet to see what details are possible at this less-than-ideal opposition with it. The Moon is our closest celestial neighbor and offers great detail in a small telescope or binoculars, plus it recently acquired interest from two more spacecraft. Find out all about that and more and see what’s ‘up’!

Eyes on the Sky: Jan 16 thru Jan 22

Take a tour through Taurus, Part 1

Take a tour through Taurus (Part 1) by visiting Aldebaran and the Hyades, then set your sights on Saturn and it’s moons as the ringed planet reaches sufficient altitude in the sky by early morning to warrant telescopic viewing. Also covered: Where Venus, Jupiter and Mars can be found in the sky this week.

( I had rather add here that Auriga, Taurus and Orion don’t appear the way as shown by Dave in our skies. They actually appear the other way round.  Orion first, then Taurus and then Auriga. Look for the Orion’s belt, the guide starts there)

Eyes on the Sky: Jan 23 thru Jan 29

Take a tour through Taurus, Part 2

Finishing the tour of Taurus, this week’s “Eyes on the Sky” video focuses on how to find and see the Pleiades and M1, the Crab Nebula.  Light pollution and light trespass avoidance strategies to enhance viewing of dim celestial objects are discussed.  Also highlighted: Jupiter and it’s moons, plus notes on how and where to find Venus, Mars and Saturn this week as well.

Chart 9: TAURUS, ORION, MONOCEROS, LEPUS, CANIS MINOR/MAJOR

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