Age of the Universe
The current estimate of the age of the universe is about 13 billion years. The 60 old-years following Hubble's original findings have seen numerous revisions of the constant. HST's main purpose was the measurement of the Hubble constant. The Hubble's constant as measured by the space telescope was on the high side implying a rather young Universe also depending on what theoretical mode is accepted. Scientists say the Universe could be just 8 billion years old if the Hubble constant is precisely 80.
Size of the Universe
No one knows whether the Universe is finite or infinite in size. Albert Einstein described the Universe as "finite but unbound" meaning that the frontiers cannot be observed even though they are definitely there.
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