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Showing posts with label galaxies. Show all posts

Saturday, September 3, 2011 ~ Have your say...

Milky Way Creation Simulation (video)

For decades, astrophysicists have attempted to recreate the formation of spiral galaxies such as the Milky Way as realistic as possible. 

Recently, a groupd of astrophysicists from the University of Zurich demonstrated the world's first realistic simulation of the creation of the Milkey Way galaxy.  The simulation was done in collaboration with astronomers from the University of California at Santa Cruz. 

The new results were partly calculated on the computer of the Swiss National Supercomputing Center (CSCS) and show, for instance, that there must be stars on the outer edge of the Milky Way.

"The simulation follows the interactions of more than 60 million particles of dark matter and gas. A lot of physics goes into the code--gravity and hydrodynamics, star formation and supernova explosions--and this is the highest resolution cosmological simulation ever done this way," said astrophysist Guedes.

Just how complex was this simulation? It was calculated in 8 months at the Swiss National Supercomnputing Centre at Manno, Switzerland. It would take 570 years of comptuational time to run the same simulation on a personal computer.

And here it is - the formation of our Milky Way galaxy:

Thursday, September 1, 2011 ~ Have your say...

Tempest Milky Way: a stunning example of time-lapsed photography

Produced by Randy Halverson and shot in central South Dakota, this is a stunning example of time lapsed photography of our Milky Way galaxy with a backdrop of electrical storms in the background.


From the Vimeo page:
"One of the challenges in making this video, was trying to get good storm with stars shots. The opportunity doesn't come along very often, the storm has to be moving the right speed and the lightning can overexpose the long exposures. I had several opportunities this summer to get storm and star shots. In one instance, within a minute of picking up the camera and dolly, 70mph winds hit. One storm was perfect, it came straight towards the setup, then died right before it reached it."
Visit his page to see more: http://vimeo.com/28040685

Thursday, June 3, 2010 ~ Have your say...

Incredible Images of Galaxies: Part 2

"Telescopes are in some ways like time machines. They reveal galaxies so far away that their light has taken billions of years to reach us. We in astronomy have an advantage in studying the universe, in that we can actually see the past.

We owe our existence to stars, because they make the atoms of which we are formed. So if you are romantic you can say we are literally starstuff. If you're less romantic you can say we're the nuclear waste from the fuel that makes stars shine.

We've made so many advances in our understanding. A few centuries ago, the pioneer navigators learnt the size and shape of our Earth, and the layout of the continents. We are now just learning the dimensions and ingredients of our entire cosmos, and can at last make some sense of our cosmic habitat."
 - Sir Martin Rees, Astronomer Royal of Great Britain

With that, Part 2 of 3:Incredible Images of Galaxies


NGC5866:

The Milky Way:  Galactic Center

Hoag's Object:

M31:

NGC7049:

NGC5257 and NGC5258 Interacting:




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