Final answer:
The age of the universe is approximately 14 billion years, a figure consistent with estimates derived from the Hubble constant and confirmed by observing the oldest astronomical objects.
Step-by-step explanation:
The age of the universe is thought to be approximately 14 billion years. Using estimates from the Hubble constant, which are around 21 or 22 kilometers/second per million light-years, calculations suggest that the universe is about 13.799 billion years old, with a +/- 0.038 billion years (or 38 million years) margin of error, indicating our understanding of the universe's age is quite precise. Moreover, this age estimate is consistent with the observed ages of the oldest astronomical objects, as they must be younger than the universe itself.