Coldest Known Object in Space Is Very Unnatural
 

The coldest known object out in space has now been announced by scientists. It's not a frozen comet or even some distant, chilly gas cloud. Rather, it's a spacecraft.




On July 3, the European Space Agency's Planck spacecraft reached this frigid extreme as part of a key step in the satellite's mission to observe the remnant radiation of the Big Bang.




Since its launch on May 14 (accompanied by its sibling spacecraft Herschel), Planck has been traveling to its final orbit at the second Lagrange point of the sun-Earth system, L2, and cooling its instruments down to their operational temperature of minus 459.49 degrees Fahrenheit (minus 273.05 Celsius). This temperature is just 0.1 Celsius above absolute zero, the coldest temperature theoretically possible in our universe.




"It is indeed both the coldest spot in any spacecraft that we know about, and also the coldest known object in space, including dust, gas etc.," Planck project scientist Jan Tauber wrote in an email. "Of course in a laboratory on Earth, colder spots can be made."




Such low temperatures are necessary for Planck's detectors to study the Cosmic Microwave Background (CMB) — the first light released by the universe, only 380,000 years after the Big Bang — by measuring its temperature across the sky.




Over the next few weeks, mission operators will fine-tune the spacecraft's instruments. Planck will begin to survey the sky in mid-August.




Planck is equipped with a passive cooling system that brings its temperature down to about minus 382 F (minus 230 C) by radiating heat into space. Three active coolers take over from there, and bring the temperature down further to an amazing low of minus 459.49 F (minus 273.05 C).




The CMB can be detected in all directions of the sky at an average temperature of 2.73 degrees Kelvin (minus 450 degrees Fahrenheit or minus 270 degrees Celsius). Previous space-based missions have found that the temperature of the CMB varies ever so slightly in different areas. Planck is built to resolve these variations in greater detail.




Planck's detectors will look for variations in the temperature of the CMB that are about a million times smaller than one degree – this is comparable to measuring from Earth the heat produced by a rabbit sitting on the Moon.



The photons in the CMB could also tell astronomers when and how the first stars formed. They could also shed light, so to speak, on how galaxies, galaxy clusters and the large voids in space came to be.


After a crucial maneuver, Planck also reached the L2 point last week. At the start of the maneuver, Planck was located 0.89 million miles (1.43 million km) from Earth.


"Everyone here is quite happy to see Planck getting into its operational orbit," said Chris Watson, Spacecraft Operations Manager.


Planck is slated for a 15-month mission, time enough for two full surveys of the sky.

http://news.yahoo.com/s/space/200907...sveryunnatural

Re: Coldest Known Object in Space Is Very Unnatural
 

I know of a colder spot Dan, She shares my bed:lmfao:

Re: Coldest Known Object in Space Is Very Unnatural
 

Chitty!:lmao:

Very interesting article Dantheman62!

Re: Coldest Known Object in Space Is Very Unnatural
 

OH LOL Chitty

that is sooooooo bad........you may burn for that one

Re: Coldest Known Object in Space Is Very Unnatural
 

if i was you,
i would NOT find that something to "lmfao" :naughty:

remember-it takes 2 to tango ;) ;)

i've often wondered why two people who originally really liked each other
enough to share a bed, would end up,
one at the north pole, and, the other at the south pole ???

Re: Coldest Known Object in Space Is Very Unnatural
 

Sounds like "Chitty, Chitty BUT NO Bang, Bang":naughty:

Re: Coldest Known Object in Space Is Very Unnatural
 

LOL, that's funny.

Re: Coldest Known Object in Space Is Very Unnatural
 

"One of these days we will look into out microscopes and find ourselves
staring straight into God's eyes, and the first one who blinks is going to
lose his testicles." - Peter O'Toole, in "Creator" ;)

Had to come back and add...

"Yeah I like my women like my coffee."
"Hot and black?"
...
"Cold and bitter."


Ok, I'll leave it alone, promise.

Fred

Re: Coldest Known Object in Space Is Very Unnatural
 

"Coldest Known Object in Space Is Very Unnatural"

You've met my wife? :mfr_lol:

Re: Coldest Known Object in Space Is Very Unnatural