In Hubble's Law ($v = H_0 d$), what does the Hubble Constant ($H_0$) specifically quantify?
Answer
The current rate at which the universe is expanding
$H_0$ is the proportionality factor that links a galaxy's distance to its current recessional velocity, representing the expansion rate at the present time.
Related Questions
What was the generally assumed state of the universe before Edwin Hubble's key astronomical findings?What crucial relationship did Hubble establish regarding galaxy recession?What physical effect, observed in light spectra, was central to measuring galactic recession velocity?In Hubble's Law ($v = H_0 d$), what does the Hubble Constant ($H_0$) specifically quantify?How did Hubble's discovery fundamentally redefine the nature of cosmic expansion?What major cosmological model found its observational anchor in Hubble's discovery of cosmic expansion?What assumption about the expansion rate did scientists hold before the late 1990s based on gravitational expectations?What specific astronomical objects were used in the late 1990s to reveal that the universe's expansion is speeding up?What is the mysterious component currently believed to be causing the universe's expansion to speed up?If $H_0$ is higher, what does this imply about the estimated age of the universe ($T_0$)?