http://interconnected.org/home/more/lightcone/ "In general relativity, the future light cone is the boundary of the causal future of a point and the past light cone is the boundary of its causal past." [wikipedia.org] This feed lists the stars in your personal light cone. Pi-3 Orionis is 26.2 light years away and only 7 months from the outer surface of your light cone - your ever-growing sphere of potential causality - which began its expansion from Earth on February 08 1985. Alpha Lyrae is 25.3 light years from Earth. It was enveloped by your light cone 3 months ago. Alpha Piscis Austrini is 25.1 light years away. HR8721 is 24.9 light years away. Mu Cassiopeiae is 24.6 light years away. Beta Hydri is 24.4 light years away. 107 Piscium is 24.4 light years away. HR222 is 24.3 light years away. HR6426 is 23.6 light years away. HR753 is 23.5 light years away. Xi Bootis is 21.9 light years away. HR8832 is 21.3 light years away. Delta Pavonis is 19.9 light years away. 82 Eridani is 19.8 light years away. HR7703 is 19.7 light years away. 36 Ophiuchi is 19.5 light years away. Eta Cassiopeiae is 19.4 light years away. HR5568 is 19.3 light years away. Sigma Draconis is 18.8 light years away. Alpha Aquilae is 16.8 light years away. 70 Ophiuchi is 16.6 light years away. Omicron-2 Eridani is 16.4 light years away. Tau Ceti is 11.9 light years away. Epsilon Indi is 11.8 light years away. 61 Cygni is 11.4 light years away. Alpha Canis Minoris is 11.4 light years away. Epsilon Eridani is 10.5 light years away. Alpha Canis Majoris is 8.6 light years away. Alpha Centauri is 4.4 light years away. The Sun is right here.