Hubble constant

• Is There a Relationship Between the Cosmological Constant and the Hubble Constant?
  The cosmological constant and Hubble constant are connected through the Friedmann equation, but neither determines the other without a cosmological model.
• At What Speed Is the Universe Expanding?
  The universe has no single expansion speed: its current rate is about 70 km/s per megaparsec, so more distant galaxies recede faster.