Mira defies known physics

In the news...

From the BBC news website, today...

A distant star that hurtles through space at extraordinary speeds has a huge, comet-like tail trailing in its wake, astronomers say. The appendage, which measures a colossal 13 light years in length, was spotted by Nasa's Galaxy Evolution Explorer (Galex) space telescope.

The researchers said that nothing like it had ever been spotted around a star. They believe the star, known as Mira, will help them to study what happens as stars meet their demise.

Mark Seibert, a co-author of the paper, which was published in the journal Nature, and a scientist at the Carnegie Observatories in Pasadena, said: "This is an utterly new phenomenon to us, and we are still in the process of understanding the physics involved."

...

Billions of years ago, Mira would have been much like our Sun, but as it now enters its death-throes it has swollen into a type of star known as a red giant.

As it races through space at 130km/s (80 miles per second) it sheds vast amounts of material.

After 400 years of study, Mira continues to astound
Research team

Yet despite centuries of study, its spectacular tail had remained undetected.

Now, ultraviolet images taken by the Galex space telescope have uncovered Mira's unusual feature.

Barry Madore, a co-author of the paper and senior research astronomer at the Carnegie Observatories, said: "Galex is so exquisitely sensitive to ultraviolet light and it has such a wide field of view that it is uniquely poised to scan the sky for previously undiscovered ultraviolet activity.

"The fact that Mira's tail only glows with ultraviolet light might explain why other telescopes have missed it."

The ultraviolet images also revealed a "bow shock" - a region, in front of the star, where hot gas builds up as Mira's stellar wind meets clouds of interstellar gas and dust.

The team believes that the hot gas in the bow shock is heating up gas that the star is shedding to create a turbulent tail trailing in its wake.

The scientists said that the tail was made up of the material that Mira has been ejecting over a period of 30,000 years.

Mark Seibert said: "We hope to be able to read Mira's tail like a ticker tape to learn about the star's life."

Studying the carbon, oxygen and other elements that make up the tail, the team said, could also provide an insight into how new solar systems and possibly even life are formed.

"After 400 years of study, Mira continues to astound," the team concluded.

...

Wonder quite what this tells us about the Miranu?

Given all their wealth and scientific know-how they probably managed to cope. It'd be sad if they fried

I saw this, quite interesting.

As it turns out, I'm uniquely positioned to have an insider's knowledge of the situation. Fact is, it's not a red giant after all, there was just a big accident with Defense Pods, Fuzz Bags, and a Repulsor Beam. You don't want to know.

How, exactly, does it defy physics? From the sounds of it, they just have lots of data to look at, but Mira isn't doing anything that defies physics.

@voinianambassador, on Aug 15 2007, 06:19 PM, said in Mira defies known physics:

From the BBC news website, today...

A distant star that hurtles through space at extraordinary speeds has a huge, comet-like tail trailing in its wake, astronomers say. The appendage, which measures a colossal 13 light years in length, was spotted by Nasa's Galaxy Evolution Explorer (Galex) space telescope.

The researchers said that nothing like it had ever been spotted around a star. They believe the star, known as Mira, will help them to study what happens as stars meet their demise.

Mark Seibert, a co-author of the paper, which was published in the journal Nature, and a scientist at the Carnegie Observatories in Pasadena, said: "This is an utterly new phenomenon to us, and we are still in the process of understanding the physics involved."

...

Billions of years ago, Mira would have been much like our Sun, but as it now enters its death-throes it has swollen into a type of star known as a red giant.

As it races through space at 130km/s (80 miles per second) it sheds vast amounts of material.

After 400 years of study, Mira continues to astound
Research team

Yet despite centuries of study, its spectacular tail had remained undetected.

Now, ultraviolet images taken by the Galex space telescope have uncovered Mira's unusual feature.

Barry Madore, a co-author of the paper and senior research astronomer at the Carnegie Observatories, said: "Galex is so exquisitely sensitive to ultraviolet light and it has such a wide field of view that it is uniquely poised to scan the sky for previously undiscovered ultraviolet activity.

"The fact that Mira's tail only glows with ultraviolet light might explain why other telescopes have missed it."

The ultraviolet images also revealed a "bow shock" - a region, in front of the star, where hot gas builds up as Mira's stellar wind meets clouds of interstellar gas and dust.

The team believes that the hot gas in the bow shock is heating up gas that the star is shedding to create a turbulent tail trailing in its wake.

The scientists said that the tail was made up of the material that Mira has been ejecting over a period of 30,000 years.

Mark Seibert said: "We hope to be able to read Mira's tail like a ticker tape to learn about the star's life."

Studying the carbon, oxygen and other elements that make up the tail, the team said, could also provide an insight into how new solar systems and possibly even life are formed.

"After 400 years of study, Mira continues to astound," the team concluded.

...

Wonder quite what this tells us about the Miranu?

**Since they have a good number of other planets, I'd say only the homeworld would be in trouble. Of course, since EVO takes place several hundred years in the future, maybe the star has already died..

_bomb

**

Then what was that planet you land on?

They moved it away and then put it back later.

That is the reason why they developed the tractor beam.

Off hand, the planet that is the Miranu's homeworld is Mira. The system that Mira is in, is Mirava.

So the big mistake here, is that what they're tracking isn't really a star at all. It's their homeworld. Big planet, I know, but hey, whatever. That tail is just the result of them moving their homeworld further from the renegade threat until they hire the Zachit sometime in the next century.