Which year saw the opening of the Thames flood barrier, the launch of the Hubble telescope and Indira Ghandi's assassination?
1928 Thames flood happening again, plans were made in the mid-1960s to build a flood barrier on the Thames to guard against the threat of storm surges. By then, much of London's shipping had moved to Tilbury Docks further downriver, greatly reducing the navigational difficulties that a barrier would present. The Thames Barrier project finally got under way in 1974, with the barrier officially opening in 1984. 1928 Thames flood The 1928 Thames flood was a disastrous flood of the River Thames that affected much of riverside London on 7 January 1928, as well as places further downriver. Fourteen people died and thousands
Hubble Space Telescope constant, the measure of the rate at which the universe is expanding, which is also related to its age. Before the launch of HST, estimates of the Hubble constant typically had errors of up to 50%, but Hubble measurements of Cepheid variables in the Virgo Cluster and other distant galaxy clusters provided a measured value with an accuracy of ±10%, which is consistent with other more accurate measurements made since Hubble's launch using other techniques. The estimated age is now about 13.7 billion years, but before the Hubble Telescope scientists predicted an age ranging from 10 to 20 billion years.