How to see Polaris
The North Star or Pole Star – aka Polaris – is famous for holding nearly still in our sky while the entire northern sky moves around it. Polaris is not the brightest star in the nighttime sky, as is commonly believed. Polaris is only about 50th brightest.
Still, this star is bright enough to spot even from some suburban skies. In a dark country sky, even when the full moon obscures a good deal of the starry heavens, the North Star is still relatively easy to see.
Best of all, Polaris is readily found by using the prominent group of stars known as the Big Dipper, perhaps the northern hemisphere’s most famous star formation. To locate Polaris, all you have to do is to find the Big Dipper pointer stars Dubhe and Merak. These two stars outline the outer part of the Big Dipper bowl. Simply draw a line from Merak through Dubhe, and go about 5 times the Merak/Dubhe distance to Polaris.
Does the North Star ever move?
Polaris is famous for more reasons than one. It’s famous for hardly moving while the other stars wheel around it. And it’s famous for marking the end of the Little Dipper‘s handle.
The Big Dipper, like a great big hour hand, goes full circle around Polaris in one day. More specifically, the Big Dipper circles Polaris in a counter-clockwise direction in 23 hours and 56 minutes. Although the Big Dipper travels around Polaris all night long, the Big Dipper pointer stars always point to Polaris on any day of the year, and at any time of the night. Polaris marks the center of Nature’s grandest celestial clock!
History
Polaris hasn’t always been the North Star and won’t remain the North Star forever. But this star well served as the North Star when the Europeans first sailed across the Atlantic over 5 centuries ago.
Credit: Steve Mandel (Hidden Valley Observatory)
And Polaris will continue its reign as the North Star for many centuries to come. It will align most closely with the north celestial pole – the point in the sky directly above Earth’s north rotational axis – around the year 2100.
At one time in human history, people literally depended on their lucky stars for their lives and livelihood. Luckily, they could trust the Big Dipper and the North Star to guide them. People could sail the seas and cross the trackless deserts without getting lost. When slavery existed in the United States, slaves counted on the Big Dipper (which they called the Drinking Gourd) to show them the North Star, lighting their way to the free states and Canada.
Polaris marks the way due north. As you face Polaris and stretch your arms sideways, your right hand points due east, and your left hand points due west. About-face of Polaris steers you due south.
Does Mars have a North Star?
As you travel northward, Polaris climbs higher in the sky. If you go as far north as the North Pole, you’ll see Polaris directly overhead. As you travel south, Polaris drops closer to the northern horizon. If you get as far as the equator, Polaris sinks to the horizon. South of the equator, Polaris drops out of the sky.
Science
Astronomers estimate Polaris’ distance at 430 light-years. Considering the distance, Polaris must be a respectably luminous star. According to the star aficianado, Jim Kaler, Polaris is a yellow supergiant star shining with the luminosity of 2500 suns. Moreover, this single point of light that we see as Polaris is actually a binary – two stars orbiting a common center of mass. Polaris is also the closest and brightest Cepheid variable star – a type of star that astronomers use to figure distances to star clusters and galaxies.
Polaris, aside from being honored as the North Star, enjoys the title of Lodestar and Cynosure as well.
Polaris’ position is RA: 2h 31m 48.7s, dec: +89° 15′ 51″
Polaris, the North Star, is NOT the brightest star in the nighttime sky, as is commonly believed. Polaris is only the 50th brightest or thereabouts, but this star is plenty bright enough to spot in a dark country sky. Even when the full moon obscures a good deal of the starry heavens, the North Star is still relatively easy to see. Best of all, Polaris is readily found by using the prominent group of stars known as the Big Dipper, perhaps the northern hemisphere’s most famous star formation.
Polaris hasn’t always been the North Star and won’t remain the North Star forever. But this star well served as the North Star when the Europeans first sailed across the Atlantic over 5 centuries ago.
It has been observed that in 10,000 years the north star for earth will be Vega. This is due to our Suns orbital path in our spiral Galaxy. I wonder if this has changed since now it is believed that the Milky Way is a spoked Galaxy? Orbits are fun to envision.
Jeff,
Vega will become the North Star some 12,000 or so years from now because of the precession of the equinoxes. Due to 26,000-year precession cycle, the tilt of Earth’s axis changes its position relative to the backdrop stars, tracing a circle in the sky with a radius of about 23 degrees, centered on a point in the constellation Draco. Over the long course of time, however, the “fixed” stars themselves even change position on the stellar sphere. If astronomers have taken everthing into account and computed correctly, the bright stars Capella and Aldebaran served as a double North Star nearly one half million years ago!
and how do you figure this out. all I am saying is some said the world was
going to end may 21 2011 and it didnt end. I would check your math
before you go telling any one else
Polaris will alway stay the same . so i have to disagre wit both of you guys
you need to check your math
shouldnt polaris be closer to mars instead of behind the moon shouldnt the sun be at the equater north to north in a 24hr day and shouldnt the moon be between the equator and the north pole from south to south in a 24hr period
YOU ARE ALL WRONG.
Why is he wrong!!!
How can every one be wrong. I am doing a project right now and every place I have
looked they have said that polaris is not the brightests. And there are more than 1
Yes that makes alot of sence what you are saying.And I think that the moon shuld be between the equator and north pole from north to north in 24hr period!:)
BOING
Hi
You are really wrong
k.monty,
The sun, moon and planets are found in the region of the sky called the zodiac. They are never close to Polaris, the North Star. The moon swings from about 24 degrees north to 24 degrees south of the celestial equator in a month. The sun goes from 23.5 degrees north to 23.5 degrees south of the celestial equator in a year.
[...] — it encourages this through a light-filled and symbolically resonant tower which will frame Polaris, the navigation star. Focusing on character training with such a prominent facility bodes well, [...]
i agree in bruce coment
Thanks for this great article! Very informative :-)
your are wrong and right at the same time
It’s good to know,Polaris and Astro charts.Effects everyone.
i swear inew that ihave a new lesson about polarisand more learn
[...] my knowing in that moment. It was the North Star. Not the traditional North Star which is called Polaris, but what I believe will be referred to as the “New North Star” (perhaps metaphorically [...]
The polarias star is really beautiful!