Unusually Red or Purple Sunsets and Sunrises One of the most enchanting sights in nature is a vividly red or purple sky during sunrise or sunset. While it may seem like a mere visual treat, it can ...

The Sun sets differently on Mars ... A great example of the effects can be seen in the Red Planet’s noctilucent clouds. Latin for “night shining,” noctilucent clouds (also known as twilight clouds) ...