Most of our knowledge of evolutionary tracks comes from stars ...

[pane00]

Most of our knowledge of evolutionary tracks comes from stars found in ________.
 
  Fill in the blank(s) with correct word

Question 2

You are going to construct a new optical observatory, and money is no object. Other than putting it into space, what factors will affect your decision for its location on Earth?
 
  What will be an ideal response?

[alexisweber49]

Answer to Question 1

clusters

Answer to Question 2

Closer to the equator will give you a view of more of the entire celestial sphere. The higher your location, the less turbulence you will experience, and less water to block the infrared. You want a large number of clear nights, very stable atmospheric conditions, and isolation from man-made light pollution. Such sites are often located on mountain tops in deserts, isolated coastal mountains in the Americas, and on mountaintops on islands like Hawaii and the Canary Islands.

[pane00]

Gracias!

[essyface1]

Thanks for the timely response, appreciate it