If there is one star that serves to announce the arrival of fall as the leaves have begun to turn, unquestionably that title ...

Mercury currently appears as a bright "evening star" in the southwestern sky at sunset. Mercury will reach its greatest ...

The month brings a spectacular lineup of celestial sights—including a rare chance to see Mercury without a telescope and a ...

Also known as the “Seven Sisters,” the striking cluster has long been used as an important seasonal marker and appears high ...