To keep a telescope fixed on a stellar target over time as Earth ...

[ereecah]

To keep a telescope fixed on a stellar target over time as Earth rotates, the telescope must have a/an ___________________ __.
 
  Fill in the blank(s) with correct word

Question 2

The least massive main-sequence stars have a/an _____ luminosity class and a/an _____ spectral class.
 
  Fill in the blank(s) with correct word

[Beatricemm]

Answer to Question 1

sidereal drive

Answer to Question 2

V, M

[ereecah]

Thanks for the timely response, appreciate it

[helenmarkerine]

Gracias!