The observable universe is 93 billion light-years across (or ~8.8×10²³ kilometers). So far, no human has ventured farther than 1.3 light-seconds from Earth https://t.co/JVaDghLnR5 | https://t.co/uKM4Xecchi https://t.co/cTBQDbZzEz

The observable universe is 93 billion light-years across (or ~8.8×10²³ kilometers). So far, no human has ventured farther than 1.3 light-seconds from Earth https://t.co/JVaDghLnR5 | https://t.co/uKM4Xecchi pic.twitter.com/cTBQDbZzEz

— Massimo (@Rainmaker1973) December 14, 2018

from Twitter https://twitter.com/Rainmaker1973

December 14, 2018 at 08:28PM