Wednesday, August 15, 2007

Sundancer


Bigelow Aerospace has been quietly and methodically building a presence in Space. With the success of its Genesis 1 and Genesis 2 modules currently in orbit, Bigelow has decided to go straight to a full Space Station. Inflation of launch prices convinced them to take this next giant step soon. Capable of supporting a crew of 3, Sundancer will be available for science, private industry and even hotels. It will be in orbit by 2010, about the time ISS is finally finished. You read it here first last September Inflatable Space.

Another kind of inflation has not made progress. 30 years ago when rising prices were on everyone's mind, Alan Guth suggested that the early Universe expanded at warp speed, faster than light. Speculation about inflation has kept physicists in grants for years. The idea can not be tested, and relies on an ethereal repulsive energy. As with the string enterprise, scientists are getting uneasy. Space.com continues the story:

"Inflation is an extremely powerful theory, and yet we still have no idea what caused inflation-or whether it is even the correct theory, although it works extremely well," said Eric Agol, an astrophysicist at the University of Washington.

For some scientists, inflation is a clunky addition to the Big Bang model, a necessary complexity appended to make it fit with observations. Nor was it the last such addition.

"We've also learned there has to be dark matter in the universe, and now dark energy," said Paul Steinhardt, a theoretical physicist at Princeton University. "So the way the model works today is you say, 'OK, you take some Big Bang, you take some inflation, you tune that to have the following properties, then you add a certain amount of dark matter and dark energy.' These things aren't connected in a coherent theory."

Inflation and a repulsive "dark energy" are part of cosmology's standard model. Like the epicycles of old, the model is filled of such epicycles to explain the Universe. Not all physicists are happy with this unwieldy concorde. They are just waiting to see a better theory.

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6 Comments:

Anonymous a quantum diaries survivor said...

Hi Louise,

thank you for the news on the race to new space stations. I wonder if you will be made a testimonial of the new hotel in space...

I personally would not agree to spending million of dollars for a ride on a space station. Much, much, much better for me would be to be sent with a set of eyepieces to the primary focus of the Hubble ;-) But who knows, things are progressing fast...

Inflation is a dangerous concept. It is bound to blow...

Cheers,
T.

8:38 AM  
Anonymous Frank Glover said...

But realize that if enough people are willing to pay for such rides, it will spur the development of economical, re-useable spacecraft (the science and communications markets alone aren't big enough...Boeing would never have spent billions on 777 development, were it not sure of selling many copies, and airlines wouldn't buy, if they didn't expect to fly them [that's when a plane makes money] often), which means far more users (including those with pure research plans) get far more opprotunites to fly...

In the end, you needn't settle for just one Hubble-class instrument.

11:08 AM  
Anonymous alex said...

Inflation of the early universe is nothing to do with the dark energy.It happends in the influense of the Higgs fields.

2:47 AM  
Blogger DaVinci said...

Rio, have you heard of the (1990) movie Mindwalk? If so and if you have seen it, what did you think?

6:16 AM  
Blogger L. Riofrio said...

Tommaso and frank: I hope that science continues too, and that we can put real experiments (like the Alpha Magnetic Spectrometer) on Space stations.

For davinci: Haven't seen that movie, must look for it.

8:47 PM  
Blogger davinci said...

You can see the full length avi at google video.

1:53 AM  

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