Multiple Choice
A standard candle is an object with a known luminosity, or, equivalently, a known absolute magnitude. To obtain the distance to the object one still has to use:
A) Kepler's third law.
B) the inverse-square law.
C) the distance modulus equation.
D) the Hubble law.
Correct Answer:

Verified
Correct Answer:
Verified
Q42: Approximately how many galaxies are included in
Q43: Why are the gravitational lens image arcs
Q44: Voids are believed to contain:<br>A)nothing.<br>B)gas and faint
Q45: It is proposed that the ordinary matter
Q46: One astronomer (astronomer A) claims that the
Q48: The type or group of galaxies that
Q49: It is the year 1920 and you
Q50: Which of the following would you NOT
Q51: The Milky Way Galaxy:<br>A)contains almost all the
Q52: If the estimated distance from Earth to