... Astrophysics Group . ... The Astrophysics Group is now based in the new Battcock Centre for Experimental Astrophysics, which is located close to the Institute of Astronomy off the Madingley Road to the west of Cambridge city centre. ... The Cavendish Laboratory itself is on J.J. Thomson Avenue on the University West Cambridge site across the Madingley Road. ... If eastbound towards the city, look for a long traffic island with a right-turn break through signposted J.J. Thomson Avenue . ...