Why is the Hyades Cluster important for building up a catalog of ...

[yoooooman]

Why is the Hyades Cluster important for building up a catalog of the true luminosities of main-sequence stars?
 
  A) It is close enough to us that the distance to its stars can be found by stellar parallax.
  B) It's a cluster that has been photographed over many decades, so we know how the stars vary in brightness.
  C) It contains many Cepheid variable stars that can be used to determine its distance.
  D) It is an extremely bright star cluster.
  E) It is an old globular cluster whose age we can determine very accurately by measuring its main-sequence turn-off point.

Question 2

Galileo is credited with designing the first reflector telescope.
 
  Indicate whether the statement is true or false

[meganlapinski]

Answer to Question 1

A

Answer to Question 2

FALSE

[yoooooman]

Gracias!

[patma1981]

Excellent