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"Inside the Image // Hubble 
Space Telescope" "Carina Nebula"

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People ask me sometimes,  

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"what is my favorite Hubble image?" It's 
actually the mosaic that Hubble took of the  

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Carina nebula. It's in the constellation 
Carina in the southern hemisphere.  

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It's just an area of the galaxy where material has 
collected together. Our galaxy is what's called a  

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spiral galaxy, it has a bright center with a lot 
of material in it, and then these spiral arms  

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coming out of it. If you look in areas around the 
spiral arms, where material is collected together  

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over many many millions of years, and this is one 
of the areas where the conditions were just right,  

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where the magnetic fields, where the pressure 
from surrounding stars conspired to push it  

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all together and create this massive cloud of 
dust and gas. The Hubble Space Telescope has  

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a relatively narrow field of view it's built to 
zoom in and look at individual objects so when we  

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want to appreciate an object of the size we have 
to create what's called a mosaic, where we take  

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multiple images and very carefully align them and 
stack them together. It's so large you can't see  

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it in a single image you have to piece together 
hundreds of images to cover the entire area.

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Lots of variations in temperature of the gas and 
dust so the bright material that you see in here  

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is hot material that has been heated up by the 
embedded stars. The really dark clouds are cool,  

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very dense clouds of dust and gas they tend to 
be dustier than these bright areas which are  

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dominated by gas. You see here Mystic Mountain 
which is an example of a star formation area.  

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The top of Mystic Mountain is down to the left and 
then the base of it is out this way, so as you see  

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Mystic Mountain is only a tiny fraction 
of the complex beauty of this nebula.

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You see way over here this bright spot 
which if you zoom is like a dumbbell shape,  

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Eta Carinae which is a red giant that's a 
star in the process of dying in the last  

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stages of stellar evolution and it's blowing 
material off. So you span the entire range  

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of the evolution of a single star from its 
birth to its death and everything in between.  

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All through this nebula so collectively it's 
an immense factory of forming star systems and  

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we hope planets around those star systems. 
So this is an image you can download from  

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the Hubble site and it's it's got enough data 
and depth in it you can print it out to go on  

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your wall. That's How many pixels it's got it 
and you can download it on a computer and just  

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zoom in and see the kind of detail you saw in 
Mystic Mountain anywhere else in this mosaic.

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