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 ...

The "alien mothership" hypothesis for interstellar comet 3I/ATLAS is about to have a key test, as it hits solar conjunction and perihelion. What does that mean, and why is a Harvard professor of ...

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 ...

Missions to Mars have been a priority for NASA and other national space agencies, as well as a stated focus of private space exploration companies in recent years. NASA's efforts have included using ...

NASA has decided to temporarily halt sending commands to its Mars fleet from November 11 to 25, as the Earth, the Sun, and the Red Planet align in a phenomenon known as Mars solar conjunction. This ...

Mars will disappear from Earth's sky for two weeks starting Saturday. That's thanks to a scientific phenomenon known as solar conjunction: a period during which the sun obscures Mars and Earth from ...