how can we measure the tempreture of the sun, when we can not go anywhere near it?

Question: how can we measure the tempreture of the sun, when we can not go anywhere near it?
- Keywords:
  heat,
  sun,
  temperature
Asked by to Phillip on 18 Jun 2014. This question was also asked by .
- Phillip Manning answered on 18 Jun 2014:
  
  You can measure the brightness distribution of the sun using good old Plank’s Law, and the Sun’s temperature can be estimated. The sun emits maximum at the visible or yellow wavelength and the corresponding temperature is about 6000 degree Kelvin.

Question: how can we measure the tempreture of the sun, when we can not go anywhere near it?