Skip to comments.The Mystery of the North Star: Astronomers baffled to find Polaris is getting BRIGHTER
Posted on 02/06/2014 12:11:57 AM PST by ApplegateRanch
Team found that Polaris is 2.5 times brighter today than in 137CE Experts say find is 'entirely unexpected'
Astronomers have discovered that Polaris, the north star, is getting brighter. They say the star has suddenly reversed two decades of dimming. It is expanding at more than 100 times the rate they expected - and nobody is sure why.
A team led by Scott Engle of Villanova University in Pennsylvania recalibrated historic measurements of Polaris by Ptolemy in 137 C.E., the Persian astronomer Al-Sufi in 964 C.E., and others. They investigated the fluctuations of the star over the course of several years, combing through historical records and utilising the Hubble Space Telescope. The team found that Polaris is 2.5 times brighter today than in Ptolemy's time, which they say is a remarkable rate of change.
'If they are real, these changes are 100 times larger than predicted by current theories of stellar evolution,' says Villanova astronomer Edward Guinan. The team's data also hint that the star's cyclic 4-day variation in brightness, although still weak, is once again growing more robust--but no one knows what's driving these flutterings or how long they will last. Engle and his team began to research the star around the beginning of 2000, when they found that the dropping brightness was on the rise again.
(Excerpt) Read more at dailymail.co.uk ...
Should be of interest tio you.
It's all perspective
So they are making this claim based on a 1100 year old observation compared to new intrumentation made just 14 years ago?
I think that explains it right there.
‘Tis a ystery.
partly; but the reversals and major brightening are from comparing 20th century measurements; the stuff going back centuries is a different issue. The article is a typical Daily Mail jumble.
Question from the ignorant here: what does CE stand for?
Key phrase to this article.
Yes it’s sort of like Global Warming. Trying to use modern measurements against estimated ancient measurements doesn’t necessarily work well. And it is Bush’s fault.
Common Era. PC way of saying AD, originated in at least mid 1800s.
IT WENT BOOOOOOOOOOOOOOOOOOOOOOOOOMMMM!!
Polaris is such a quirky north star. Thuban was much more reliable.
It's an atheist thing. Their fingers just can't write AD or BC because God is in those abbreviations.
You’re right; Thuban is the logical choice.
I preferred Vega, but Chevy took it over and tarnished the name, and so now we’re stuck with Polaris, a wonky Dodge product.
We need to crank Thuban back into position.
Must be the reason for global warming here./s
I always read it as “Christian Era” when I come across it. Which is really what it means.
With what instrumentation. The first telescopes were made around 1608. The first photometers were made around 1861 and I imagine even those were not sensitive enough in a telescope for starlight measurements.
Comparisons were made by eye judging the light by comparing it to another one at least before 1608. So just how accurate that is the article does not say.
Must be another consequence of Global Warming...
Polaris is a Cepheid variable. It’s been getting dimmer and brighter for a long time. Its various sputterings has suggested that something interestingly unstable is going on. If I recall, it’s large enough (8-12 solar masses) that it could go supernova. But if it did, we won’t know about it for 600 years. So, whatever we’re seeing now is what it was doing 600 years ago. (Yawn...old news.)
Very ysterious indeed!
The North Star Polaris Is Getting Brighter by Nola Taylor Redd, SPACE.com Contributor | January 28, 2014 06:41am ET Photo of Polaris, the North Star and close-up This long-exposure photo (left) shows how the North Star, Polaris, stays fixed in the night sky as other stars appear to move during the night due to Earth's rotation. At right, a close-up of the multi-star Polaris system. Credit: Left image: M. Menefee; Right: N. Carboni; Assembly: D. Majaess
CE stand for Common Era, a substitute for “Anno Domini,” The Year of our Lord. It is used by miscreants who are offended by the terms AD and BC. It is still based on the birth of the Baby Jesus.
'Tis an ystery.
Remember that the indefinite article changes to "an" before vowels!
I got yer dangling participle right ‘ere !
Nice picture. I am glad that star motion is too slow to see; I’m getting dizzy just looking at the pic.
Lots of Freeper-like jokes.
My guess is that it's actually a headlight..........
Sorry but no, I am not an astrophysicist.....
You may puke now, if you like.
I like to think of CE as Christian Era. :)
Funny number. It is the amount of one magnitude difference in modern notation. Ptolemy subdivided his stars into 15 brightness levels, so it is more precise than just by single magnitudes.
Thuban? Is that some new car company?
if it is after 1 AD. I refer to it as the Christian Era.
Yes, Vega became tarnished by its oxidative nature and generally cast a poor reflection on Chevy. Not to worry however, Thuban will come back around again in a little over 18,000 years and all will be well again.
Well, it’s either Global Warming or Bush’s fault.
The libs want to substitute “common era” for “AD” (year of our Lord).
But, when you see “CE”, just say “Christian era”.
What does C.E. stand for?
What is 137CE?
The star’s storage unit?
I expect to hear the following any time now from Jay Carney: “Not only will Obamacare improve people’s lives by incentivizing people to work less hours, or not work at all, but it makes the North Star shine brighter.”
Which raises the question - did it really make a sound in the vacuum of space? If so, did the gases that comprised the BOOOOOOOOOOOOOOOOOOOOOOOOOMMMM provide the vehicle for the sound? If this is the case, did any trees in the woods hear the sound?
So many questions for the scientists to focus on and all they care about is how it didn't stop global warming...
So BC is now... what, UE?
Dang, I hate it when I don’t get those memos...
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