NASA spacecraft embarks on historic journey into interstellar space

NASA's Voyager 1 spacecraft officially is the first human-made object to venture into interstellar space. The 36-year-old probe is about 12 billion miles (19 billion kilometers) from our sun. New and unexpected data indicate Voyager 1 has been traveling for about one year through plasma, or ionized gas, present in the space between stars.

Key component of DNA found in interstellar space

Two prebiotic molecules - one related to DNA and the other to an amino acid - have been identified in a gas cloud near the center of the Milky Way.