Breakdown of Eu vou ao museu hoje.
eu
I
hoje
today
ao
to the / at the (m.sg; f.sg à, m.pl aos, f.pl às)
ir
to go
Questions & Answers about Eu vou ao museu hoje.
How did we get the word ao here?
ao is a contraction. It combines the preposition a (to) and the masculine definite article o (the). Because museu is a masculine noun, we mash them together into ao to mean "to the".
Why do we need the o part of ao? Can't we just say a museu?
In Portuguese, specific locations like museums almost always require the definite article ("the"). Instead of saying "I go to museum", you must say "I go to the museum". Since we need both a (to) and o (the), they combine into ao.
What verb does vou come from?
Does this sentence mean "I go" or "I am going"?
It means both! European Portuguese often uses the simple present tense where English uses the "-ing" form. So, Eu vou ao museu hoje translates perfectly to "I am going to the museum today".