Why do the northern lights have different colors? The color of the aurora depends on which gas is being excited by the ...

Paris, France's capital, displays why it is known as the "City of Lights" in this photo taken from on board the International ...

Up here on the International Space Station ... and half faces away from it. As the Moon orbits the Earth, we see it from different angles. We see different amounts of the lit and dark side ...

The different phases of the moon appear as the moon orbits Earth, changing our perspective of the half-lit moon, according to NASA. While the Earth’s shadow does not cause Moon phases ...

That means one half of the planet is still a little more lit than the other, even on an equinox. Earth isn’t the only planet that experiences equinoxes: Every planet in our solar system has them.

The first total lunar eclipse in more than two years lit up the sky last night as humanity, forever fascinated with the Earth’s only natural satellite, watched. In Photos and Video The total ...