View Full Version : Pluto is Colder Than Charon

2006-Jan-04, 11:42 PM
SUMMARY: Pluto is far away from the Sun, so you'd think it should be cold - but it's actually colder than astronomers were expecting. Its temperature was taken using the Submillimeter Array (SMA) on Mauna Kea in Hawaii, which was able to distinguish between Pluto and its moon Charon. Pluto is about 43 K (-382 degrees F), while Charon is 10 degrees warmer. Scientists think that heat from the Sun is converting nitrogen ice on Pluto to gas, which cools it down, similar to evaporation effect when something wet feels colder.

View full article (http://www.universetoday.com/am/publish/pluto_colder_charon.html)
What do you think about this story? post your comments below.

2006-Jan-04, 11:50 PM
Okay, this is just a silly story. :think:

2006-Jan-05, 04:32 AM
I think By the year 3000 humans could use pluto as a BIG refrigerator. Teleport machine would have been invented by then so distance would not be a problem :D

2006-Jan-08, 05:22 PM
I saw this caption on the picture with the story:

Pluto and Charon viewed from the surface of one of Pluto's newly discovered candidate satellites.

Did I miss something? Are there more satellites orbiting about Pluto?

I found this story interesting, especially with the UT story about Charon having no atmopsphere. One would think that an airless body would be colder than a planet with a tenuous atmosphere. But with Pluto's nitrogen atmoshere freezing and falling the the surface when the planet reaches it's solar apogee, the solar radiation is reflected away, or reacts with the nitrogen and the evaporation cools the planet even further.

If anyone can direct me to info about Pluto's new moons, it would be appreciated.

2006-Jan-08, 05:31 PM
Either way, doesn't sound very inviting. They'll have to get some gun real-estate agents on the job when we're actually travelling to these places.