"As an infrared telescope ISO had the ability to see objects and material that other telescopes cannot see, for example, cold dust*. The dust in the Eagle, seen in the picture as a 'bluish fog', is at about minus 100*C. Although perhaps difficult to believe, it is inside freezing dust like this that new, hot stars are born. In this image ISO has captured a view of the ice enshrouding the fire. "
http://eu.spaceref.com/news/viewpr.html?pid=5972

What is colder 173 K "freezing dust" or 2.7 K space. It seems to me that star nurseries show what happens if a star is encased in material.

I would predict that stars which are the size of the Sun or larger will overheat inside these cold clouds, and once the cloud blown away, these stars will cool.

Could this help explain our sun's paradox:

"The faint young Sun paradox or problem describes the apparent contradiction between observations of liquid water early in the Earth's history and the astrophysical expectation that the Sun's output would be only 70% as intense during that epoch as it is during the modern epoch. The issue was raised by astronomers Carl Sagan and George Mullen in 1972"
http://en.wikipedia.org/wiki/Faint_young_sun_paradox