New Insights on Comet Tails Are Blowing in the Solar Wind.

Comet McNaught. The tail of the comet McNaught over the Pacific seen from Paranal in January 2007. The Moon is seen on the right. Credit: ESO/H.H.Heyer


NASA Voyager 2 Could Be Nearing Interstellar Space.

NASA's Voyager 2 probe, currently on a journey toward interstellar space, has detected an increase in cosmic rays that originate outside our solar system. Launched in 1977, Voyager 2 is a little less than 11 billion miles (about 17.7 billion kilometers) from Earth, or more than 118 times the distance from Earth to the Sun.