Complex sentence: Penny Sackett is an American astronomer and director of the Research School of Astronomy and Astrophysics at Australian National University (ANU), as as such responsible for the Mount Stromlo Observatory in Canberra and Siding Spring Observatory in Coonabarabran, New South Wales.
Split into simpler sentences: Penny Sackett is an American astronomer and director of the Research School of Astronomy and Astrophysics at Australian National University (ANU). As such, Professor Sackett is responsible for the Mount Stromlo Observatory in Canberra and Siding Spring Observatory in Coonabarabran, New South Wales.