The pre-Christian version was a circle with an equal-armed cross internal to the circle, called the "sun cross", representing the sun. When the Celts became Christian, the cross was Christianized. The life-giving sun was compared with Christ.

When the Sun and Moon cross paths, it's called a Solar Eclipse. If the Sun is in front of the Earth and the Moon is behind, then it's called a Lunar Eclipse.

Sun Country.

Rottweilers love the sun, totally normal.

If you are referring to the orbit of Venus, it takes approximately 225 Earth days for Venus to cross the sun. 224.70069 days if you want to be exact.