Telescope Needs a Month to Reach Optimal Operating Temperature

In summary, the article explains that the new scope mentioned in the link takes about a month to cool down to optimal operating temperature due to the lack of molecules in space to conduct heat. The heatsinks are designed to radiate heat away through electromagnetic radiation, which is a slower process. This is because the other methods of heat transfer, such as convection and conduction, are difficult in the vacuum of space, and radiation also has to compete with incoming radiation from other sources. Additionally, reaching near-absolute zero in space is a challenging task.
  • #1
Echo 6 Sierra
30
2
Reading the article at http://www.msnbc.com/news/961142.asp?0dm=C13NT I saw that it said the new scope needed about a month to cool down to optimal operating temperature. Why would it take a month?

E6S
 
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  • #2
Because there is nothing out in space for the object to conduct heat to.

An oven cools down because cooler air molecules bump into it, and take energy away.

In space there are very few molecules around, and those that are there are usually highly energetic. For that reason, spacecraft 's heatsinks need to be designed to radiate heat away as electromagnetic radiation - a much slower process.
 
  • #3
Heat transfer occurs via convection, conduction, or radiation. As enigma said, convection & conduction are kinda tough in the vacuum of space. Radiation is slower and also has to fight against incoming radiation from other sources (like the Earth, sun).

Not to mention that getting down to near-absolute zero is no easy task.
 
  • #4
Thanks fella's.
 

1. What is the optimal operating temperature for a telescope?

The optimal operating temperature for a telescope is typically around -20 to 10 degrees Celsius (-4 to 50 degrees Fahrenheit). This temperature range allows for the telescope's instruments to function properly and produce the clearest images.

2. Why does a telescope need a month to reach optimal operating temperature?

A telescope needs a month to reach optimal operating temperature because it is a large and complex instrument that needs to acclimate to its surroundings. The temperature changes during transportation and installation can cause the telescope's materials to expand and contract, potentially damaging its delicate components. Allowing a month for the telescope to adjust to its environment ensures that it will function properly and produce accurate data.

3. Can a telescope be used before it reaches optimal operating temperature?

Yes, a telescope can be used before it reaches optimal operating temperature. However, using it before it has fully acclimated may result in reduced image quality and potentially damage the telescope's instruments. It is best to wait until the telescope has reached its optimal operating temperature before using it for scientific observations.

4. How is the optimal operating temperature of a telescope maintained?

The optimal operating temperature of a telescope is maintained through various methods, such as using insulation materials, heaters, and cooling systems. These systems help to regulate the temperature inside the telescope and ensure that it stays within the optimal range for the instruments to function properly.

5. Can a telescope operate in extreme temperatures?

Yes, a telescope can operate in extreme temperatures, but it may require additional precautions and modifications to its design. For example, telescopes used in space must be able to withstand extreme temperatures, both hot and cold. However, for ground-based telescopes, operating in extreme temperatures may not be ideal as it can affect the quality of the data collected. Therefore, it is important to maintain the optimal operating temperature for the best results.

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