The moon and Mars will share a close approach tonight (Nov. 20) during a conjunction as the two visit the Cancer ...

Now, imagine turning on a bright light at Earth's center and projecting our planet's equator onto the celestial sphere. Earth's equator then becomes another circle - the "celestial equator." ...

Mintaka, the top/right most among the trio of stars in Orion’s belt, rises due east. Because Orion is on the celestial equator, an extension of Earth’s equator that also divides the sky into two ...