The velocity of the universe, as measured by the Hubble constant, represents the rate at which galaxies are moving away from each other due to the expansion of space. This velocity is not caused by an acceleration in the traditional sense, but rather by the stretching of space itself. Therefore, the concept of acceleration as we typically understand it may not be directly applicable to the expansion of the universe.
That being said, the Hubble constant, denoted by Hâ‚€, represents the current expansion rate of the universe. Its value is approximately 70 km/s per megaparsec (km/s/Mpc). This means that for every megaparsec of distance, the velocity of recession is approximately 70 km/s.
To calculate the acceleration, we would need to consider the change in velocity over a given time period. However, since the expansion of the universe is driven by factors such as dark energy, which causes the expansion to accelerate over time, a simple calculation based on a single velocity value would not capture the full picture. Therefore, it is not appropriate to directly determine the acceleration of the universe solely based on its current velocity.