1. Radio Astronomy & Dark Ages …. at RSAA

2. Radio astronomy… Frank Briggs, Carole Jackson (RSAA staff) Dave Jauncey, Jim Lovell (ATNF/Tidbinbilla) Geoff Bicknell, Ralph Sutherland (theory) Ken Freeman, Helmut Jerjen (HI, gal. kinematics) + … … Mills Cross -> Molonglo Synthesis Telescope

3. Molonglo Telescope 2 arms: 1.6 km X 12m redshifted Hydrogen

4. …the end of The Dark Age …

5. Cut off from view of optical wavelengths !!! n HI n HI +n HII  10 -3 If neutral fraction >

7. Global Signal… 20 mK

8. 10 arcmin

9. Goal of new telescope: “LOFAR” = Low Frequency Array Possible site in Western Australia

10. Upcoming events… 18 Dec ATNF Epping: Global signature workshop 30,31 Jan Sydney Uni: Low Frequency Universe Wkshp 2-9 Feb visit by Lofar delegation to tour possible site in WA Jan/Feb – exchange seminars with RSPhysE