Half of the Earth is always facing the Sun, meaning it is lit up. The other half is in darkness until the planet turns around. That’s why we have day and night! SEYMOUR: The Sun keeps us warm ...

Earth rotates on its axis every 23.9 hours, defining day and night for surface dwellers. This axis of rotation is tilted 23.4 degrees away from the plane of Earth's orbit around the sun ...

Let’s put a marker on Scotland. When this part of the Earth is facing the Sun it’s day time, when it’s facing away from the Sun that's night time. One spin of the Earth is how we measure one ...

NASA astronaut Sunita Williams, currently on the International Space Station, experiences 16 sunsets and sunrises every day.

Jamie Carter is an award-winning reporter who covers the night sky ... slowing the Earth’s rotation—a process called tidal braking—which is increasing the length of our day by 2.3 ...

As the world marks the 50th anniversary of Earth Day, here are five ... also absorb the sun's heat during the day and release it into the soil at night when temperatures drop.

The comet—traveling about 44 million miles away—was observed from Earth for the first time earlier this month.

If we think the day and night on the moon are the same as how they are on the earth, we are fully mistaken. The days and nights on the moon called lunar day and lunar night are interesting ...

The popularity of “September” even gave way to an official holiday, as September 21 playfully emerged as “Earth, Wind & Fire Day.” If you’re bummed over there not being significant with ...

Charlton found the rock the next day and ... approach of Earth on Saturday. Sky-gazers won't want to miss the event since it may be the last time the comet will be seen in the night sky for ...

An “ancient” comet that won’t be seen again for tens of thousands of years will be visible Thursday night, after traveling ...