Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Since is has almost no atmosphere to retain heat, Mercury's surface experiences the greatest temperature variation of all the planets, ranging from 100 K at night to 700 K during the day.

Did you miss the last planetary parade in January? The next planetary alignment is almost here. How you can watch, a look at Ohio's weather forecast.

Could Mercury, the closest planet to the Sun ... stem from data collected by NASA’s Messenger probe, analyzed through ...

Stargazers are in for a treat this week as a planetary parade is set to take place - just a month after the last planetary ...

Researchers have long-suspected ice to persist on Mercury, a hypothesis based on Earth-based radar studies of the small planet. But other substances beside water ... The bright patches match up cold ...

Tonight gives stargazers another planet parade to view, but Ohio weather might not cooperate. What to look for and how you ...

Mercury is the closest planet to the sun ... "This is because Mercury has no atmosphere to regulate the temperature," Vincent said. "Its gravitational force is just too little to hold on to ...

The alignment formation, however, will be short-lived because each planet moves at a different speed. On Friday, seven planets – Saturn, Mercury ... with a low temperature of 30 degrees.