For a couple of weeks during October 2006, Mars and Earth will be on opposite sides of the Sun. Every day for the past decade, the U.S. has had a presence at Mars, using spacecraft to understand this ...
When 3I/ATLAS went round the back of the Sun as seen by Earth, the instant seemed as though it were a shut door. On October 30, the closest solar passage of the interstellar comet was at perihelion ...