My sister ((deleted)) and her family were looking out of a window in the family home at what they thought was a particularly bright star in the clear night sky. Almost immediately everyone witnessed the "star" start to flash in different colours. No sence of distance could be obtained, other than to observe that what they thought at first to be a star was considerably brighter than any other within their view.The observation lasted (unbroken) for 2 hours, in which time it did not appear to move at all.((NUFORC Note: We suspect that the parties may have been looking at the star, "Sirius." PD))