How might a coronal mass ejection affect Earth? What will be ...

[mmm]

How might a coronal mass ejection affect Earth?
 
  What will be an ideal response?

Question 2

A binary star system is one with two stars orbiting each other. How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight and determine their periods?
 
  What will be an ideal response?

[abro1885]

Answer to Question 1

If the field lines of a coronal mass ejection are properly oriented, they can potentially disrupt Earth's magnetosphere, causing widespread communications and power disruptions.

Answer to Question 2

As the two stars orbit each other rapidly, one will approach us, creating a blueshift of its spectral lines, while its retreating companion shows a redshift. The time to go through two splits and recombinations of their lines is their orbital period.

[mmm]

Excellent

[brbarasa]

Thanks for the timely response, appreciate it