### Question --- What is the Hubble constant? Explain in detail at least three independent methods to measure it. How does it relate to the age of the universe? ### Answer --- ##### What is the Hubble constant? ![[Hubble#Hubble Constant]] ##### Explain in detail at least three independent methods to measure it. ![[Hubble#Methods of Measurement]] ##### How does it relate to the age of the universe? ![[Timescales#Hubble Time]]