2015 Event Scientists have concluded that a large ocean exists beneath the icy surface of Ganymede, the largest moon of Jupiter; the discovery was made by using the Hubble Space Telescope to observe aurora movements at the moon's poles 2014 Event Scientists Stefan Hell of Germany and Eric Betzig and William Moerner of the U.S. share the Nobel Prize in Chemistry for developing 'super-resolved fluorescence microscopy'; the technology can be used to observe molecular activity in living cells 2014 Event Scientists from Australian National University observe the oldest star in the universe for the first time. The star, located 6,000 light years from Earth, serves as a fingerprint of the first stars in the universe; it is believed to be 13.7 billion years old 2013 Event In California, NASA launches a space probe to observe the Sun; the probe is referred to as the Interface Region Imaging Spectrograph, or IRIS 2011 Event The U.S. declares it will no longer observe the 1990 Treaty on Conventional Armed Forces in Europe 1973 Event Observers aboard Concorde jet observe 72-minute solar eclipse 1831 Event Louisiana and Arkansas are 1st states to observe Christmas as holiday 1612 Event Simon Marius, is 1st to observe Andromeda galaxy through a telescope
