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Cool, New Views of Andromeda Galaxy

infrared astronomy herschel andromeda galaxy messier 31 esa

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#1    Waspie_Dwarf

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Posted 29 January 2013 - 11:14 AM

Cool, New Views of Andromeda Galaxy



www.nasa.gov said:

Posted Image

The ring-like swirls of dust filling the Andromeda galaxy stand out colorfully in this new image from the Herschel Space Observatory, a European Space Agency mission with important NASA participation. Image credit: ESA/NASA/JPL-Caltech/NHSC  › Full image and caption



<br />
This image of an outcrop at the<br />
In this new view of the Andromeda<br />
galaxy from the Herschel space<br />
observatory, cool lanes of forming<br />
stars are revealed in the finest<br />
detail yet.<br />
Image credit: ESA/Herschel/<br />
PACS & SPIRE Consortium, O. Krause,<br />
HSC, H. Linz <br />
<a href='http://www.nasa.gov/mission_pages/herschel/multimedia/pia16682.html' class='bbc_url' title='External link' rel='nofollow external'>› Full image and caption</a>

This image of an outcrop at the
In this new view of the Andromeda
galaxy from the Herschel space
observatory, cool lanes of forming
stars are revealed in the finest
detail yet.
Image credit: ESA/Herschel/
PACS & SPIRE Consortium, O. Krause,
HSC, H. Linz
› Full image and caption
Two new eye-catching views from the Herschel space observatory are fit for a princess. They show the elegant spiral galaxy Andromeda, named after the mythical Greek princess known for her beauty.

The Andromeda galaxy, also known as Messier 31, lies 2 million light-years away, and is the closest large galaxy to our own Milky Way. It is estimated to have up to one trillion stars, whereas the Milky Way contains hundreds of billions. Recent evidence suggests Andromeda's overall mass may in fact be less than the mass of the Milky Way, when dark matter is included.

Herschel, a European Space Agency mission with important NASA contributions, sees the longer-wavelength infrared light from the galaxy, revealing its rings of cool dust. Some of this dust is the very coldest in the galaxy -- only a few tens of degrees above absolute zero.

In both views, warmer dust is highlighted in the central regions by different colors. New stars are being born in this central, crowded hub, and throughout the galaxy's rings in dusty knots. Spokes of dust can also be seen between the rings.

One view, seen at http://www.nasa.gov/...a/pia16682.html , is a mosaic of data from Herschel's Photodetecting Array Camera and Spectrometer (PACS) and spectral and photometric imaging receiver (SPIRE).

The second view, seen at http://www.nasa.gov/...a/pia16681.html , shows data from only the SPIRE instrument, which captures the longest of wavelengths detectable by Herschel.

Herschel is a European Space Agency cornerstone mission, with science instruments provided by consortia of European institutes and with important participation by NASA. NASA's Herschel Project Office is based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. JPL contributed mission-enabling technology for two of Herschel's three science instruments. The NASA Herschel Science Center, part of the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena, supports the United States astronomical community. Caltech manages JPL for NASA.

More information is online at http://www.herschel.caltech.edu , http://www.nasa.gov/herschel and http://www.esa.int/SPECIALS/Herschel .  



Whitney Clavin 818-354-4673
Jet Propulsion Laboratory, Pasadena, Calif.
whitney.clavin@jpl.nasa.gov

2013-035



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"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#2    AsteroidX

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Posted 29 January 2013 - 11:18 AM

Thanks for sharing. Beautiful pictures. :tu:


#3    Frank Merton

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Posted 29 January 2013 - 11:43 AM

I agree; thanks.

I believe our Milky Way galaxy and the Andromeda are headed on a collision course for each other and will actually collide in a few billion years.  I wish I could be around to see it -- although the individual stars are so far apart the chances of it doing harm to the earth are small, it will be something to see.


#4    AsteroidX

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Posted 29 January 2013 - 11:45 AM

Actually the kinetic and other types of energy produced by such a collision will fundamentally change everything about both galaxies. The Earth and sun will both cease to exist long before this collision occurs regardless.


#5    Waspie_Dwarf

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Posted 29 January 2013 - 12:19 PM

View PostAsteroidX, on 29 January 2013 - 11:45 AM, said:

Actually the kinetic and other types of energy produced by such a collision will fundamentally change everything about both galaxies.
No it won't. Gravitational interactions will change the external shape of the galaxies, they will cease to be spirals, but from the point of view of an observer living in either galaxy there would be no real change. A collision between galaxies is a bit like a collision between two puffs of smoke. There are huge spaces between the stars and actual, physical collisions between stars as a result are extremely rare.


View PostAsteroidX, on 29 January 2013 - 11:45 AM, said:

The Earth and sun will both cease to exist long before this collision occurs regardless.
No they won't. The Earth will likely be destroyed when the sun becomes a red giant in around 5 billion years. The two galaxies will collide in about 4 billion years.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#6    AsteroidX

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Posted 29 January 2013 - 12:42 PM

Ill take your word for it. Thank you.


#7    Hugh

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Posted 30 March 2013 - 05:59 AM

View PostWaspie_Dwarf, on 29 January 2013 - 12:19 PM, said:

The Earth will likely be destroyed when the sun becomes a red giant in around 5 billion years.

I'd like to think that our descendants will not allow that to happen. They'll save good ol' Earth. Think of how advanced human technology will be in a few thousand years, think of how much in a few billion years...

FTL speed will be attained at some point in a few thousand years for sure, allowing travel that we now think of as impossible, possible.

We'll be able to change the galactic orbit of both the Sun and Earth together as a pair, and fly to wherever we'd like to around the galaxy very quickly. We'll be able to change our Sun for other stars whenever we want to, and with Andromeda on the way, there will be even more to choose from...

Intergalactic travel will be quick at some point in the future as well. There are so many possible ways it may happen, and we have billions of years of technological advancements to "make it so."

We'll find a way. :)


#8    Rlyeh

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Posted 30 March 2013 - 06:32 AM

View PostHugh, on 30 March 2013 - 05:59 AM, said:

We'll find a way. :)
Ever thought some things are really impossible?


#9    Hugh

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Posted 30 March 2013 - 10:12 PM

View PostRlyeh, on 30 March 2013 - 06:32 AM, said:

Ever thought some things are really impossible?

Nope, I believe everything and anything is possible.

You just need the knowledge and power to do so.

Knowledge is increasing at a phenomenal rate.

The power available in the universe is huge.

Add in teamwork and determination and we can do anything we want to, and we will. :)


#10    Waspie_Dwarf

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Posted 30 March 2013 - 11:17 PM

View PostHugh, on 30 March 2013 - 10:12 PM, said:

Nope, I believe everything and anything is possible.
Belief is a wonderful thing, but evidence and knowledge trumps it EVERY time.

View PostHugh, on 30 March 2013 - 10:12 PM, said:

You just need the knowledge and power to do so.
And your evidence for this is?

View PostHugh, on 30 March 2013 - 10:12 PM, said:

Knowledge is increasing at a phenomenal rate.
Yes it is, but none of that knowledge has yet replaced Relativity, in fact the more we know the more it seems to confirm relativity.

View PostHugh, on 30 March 2013 - 10:12 PM, said:

The power available in the universe is huge.
But not greater than infinite, which is what Relativity says is needed for faster than light travel.

View PostHugh, on 30 March 2013 - 10:12 PM, said:

Add in teamwork and determination and we can do anything we want to, and we will. :)
Sadly the universe may disagree with you on that. The laws of nature limit what is possible, NOT human imagination. If the universe doesn't allow it we can't do it. At the moment our understanding suggests that faster than light travel is impossible. If we are right then we will be forever limited in the speeds we can reach.

Of course it is always possible that in the future we will discover that Relativity is wrong, or discover ways around it without breaking those laws, but even if we do your statement will still be wrong, there will always be things that the laws of nature forbid.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#11    Abramelin

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Posted 31 March 2013 - 02:12 PM

View PostWaspie_Dwarf, on 29 January 2013 - 12:19 PM, said:

No it won't. Gravitational interactions will change the external shape of the galaxies, they will cease to be spirals, but from the point of view of an observer living in either galaxy there would be no real change. A collision between galaxies is a bit like a collision between two puffs of smoke. There are huge spaces between the stars and actual, physical collisions between stars as a result are extremely rare.


The analogy with puffs of smoke may be wrong.

If one 'puff of smoke' is hydrogen gas, and the other 'puff of smoke' chloride gas, you think nothing much will happen?

H2 and Cl2 have to be close together to form 2HCl, and you can bet it happens in measurable amounts.

.

Edited by Abramelin, 31 March 2013 - 02:57 PM.


#12    Odd Requiem

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Posted 31 March 2013 - 02:45 PM

The beauty that space holds, is uncanny.

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#13    Frank Merton

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Posted 31 March 2013 - 02:51 PM

I can't imagine a technology that could save a star that is out of fuel.  Far easier just to move somewhere else.


#14    Hugh

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Posted 01 April 2013 - 01:10 AM

View PostWaspie_Dwarf, on 30 March 2013 - 11:17 PM, said:

Belief is a wonderful thing, but evidence and knowledge trumps it EVERY time.


And your evidence for this is?


Yes it is, but none of that knowledge has yet replaced Relativity, in fact the more we know the more it seems to confirm relativity.


But not greater than infinite, which is what Relativity says is needed for faster than light travel.


Sadly the universe may disagree with you on that. The laws of nature limit what is possible, NOT human imagination. If the universe doesn't allow it we can't do it. At the moment our understanding suggests that faster than light travel is impossible. If we are right then we will be forever limited in the speeds we can reach.

Of course it is always possible that in the future we will discover that Relativity is wrong, or discover ways around it without breaking those laws, but even if we do your statement will still be wrong, there will always be things that the laws of nature forbid.

Think of what we thought was "impossible" a few hundred years ago.

Think of what we can now do with our new knowledge, yes, many things that were once thought to be "impossible".

Fast forward a million years worth of scientific study, then a billion... think of what will be possible...

Look at the current rate of knowledge growth and extrapolate... envision what is to be...

We're only in the extreme infancy of our studies right now.

There is much, much more to the universe to be discovered. :)


#15    CrimsonKing

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Posted 01 April 2013 - 05:30 AM

View PostHugh, on 01 April 2013 - 01:10 AM, said:

Think of what we thought was "impossible" a few hundred years ago.

Think of what we can now do with our new knowledge, yes, many things that were once thought to be "impossible".

Fast forward a million years worth of scientific study, then a billion... think of what will be possible...

Look at the current rate of knowledge growth and extrapolate... envision what is to be...

We're only in the extreme infancy of our studies right now.

There is much, much more to the universe to be discovered. :)

All positive thoughts right there,but with all the problems we currently have just thinking about going to mars i can foresee a complete reset of humanity several times over before we ever will get to our next nearest star.To many problems,to many complications with space travel add that to the incredible rate at which we are destroying our own planet,i do not think we have another million years of our current rate of technology before us.I know this sounds pessimistic to some,but seems realistic to others.

"If it is not advantageous,do not move.If objectives can not be attained,do not employ the army.Unless endangered do not engage in warfare.The ruler cannot mobilize the army out of personal anger.The general can not engage in battle because of personal frustration.When it is advantageous,move;when not advantageous,stop.Anger can revert to happiness,annoyance can revert to joy,but a vanquished state cannot be revived,the dead cannot be brought back to life." Sun-Tzu




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