NASA shuts down Hubble space telescope due to this MYSTERIOUS reason World's premier space agency NASA has shut down Hubble space telescope halting all observations until further notice. According to NASA, the USD 1.5 billion telescope was placed into "safe mode" at 4pm ET (9pm GMT) on Sunday due to a software bug. DNA Web Team Mar 10, 2021, 12:37 PM IST World's premier space agency NASA has shut down Hubble space telescope halting all observations until further notice. According to NASA, the USD 1.5 billion telescope was placed into "safe mode" at 4pm ET (9pm GMT) on Sunday due to a software bug. 1. What is Hubble telescope?