Author Question: List at least three qualities that make an astronomical object a good standard candle. What will ... (Read 94 times)

fagboi · **on:** Jul 27, 2018

List at least three qualities that make an astronomical object a good standard candle.

What will be an ideal response?

Question 2

Valles Marineris is the most striking example of a(n)

A) scarp.
B) shield volcano.
C) oceanic trench.
D) impact crater.
E) rift valley.

BUTTHOL369 · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

All standard candles must have some observable property that allows us to recognize the object as a member of the unique class. For example, Cepheids vary in brightness in a characteristic way, allowing us to distinguish them from other stars; white dwarf supernova have a unique light-curve that allows us to distinguish them from massive star supernova. The remaining answers will vary, but some additional key properties include little statistical scatter in brightness; high luminosity so that they can be seen at a great distance; and relative commonness so that they can be found in many objects.

Answer to Question 2

E