Lunar and solar eclipses occur when the Earth, Moon, and Sun align in specific ways, but their formations and appearances ...

The sun and moon are constantly changing positions in the sky because of the Earth’s tilt and the moon’s orbit. But they have not diverged from what astronomers expect. The Earth has two types ...

Learn the differences between our Earth, the Sun and the Moon. Then explore how together they create day and night and our different seasons with their orbits.

Eclipses occur when the Earth, moon and sun line up. A total solar eclipse will pass over the U.S. on the afternoon of April 8, cutting a narrow path across 13 states from Texas to Maine.

The diameter of the sun is 400 times that of the moon, but it lies 400 times further away, meaning that at certain points in its orbit people on Earth in exactly the right position will see the ...

While the term “planet” has a clear definition, there is no strict definition of a moon. We can either say that there is one moon around Earth, or more than 160 million moons.

Twice a year, though, there is a period when the Moon and the Sun line up with Earth – astronomers call this an eclipse season. It lasts about 34 days, long enough for the moon to complete a ...

In 1867, Thomas Hardy writes in his poem, At A Lunar Eclipse, “Thy shadow, Earth, from Pole to Central Sea, now steals along upon the Moon’s meek shine,” and wonders at the seeming serenity ...