Abstract: This research investigates the initial orbit determination for missions in periodic orbits within the Earth–Moon system, observed optically from the ground. The proposed methodology requires ...

When it comes to planets in our Solar System's habitable zone, one world is too close to the Sun, another is too far and Earth is just right. But maybe things would be different if Venus and Mars ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...