I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

The Earth started as a mixture of gas and dust around the Sun and grew as it collided with asteroids and dust particles.

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

For years, astronomers have toyed with the idea that the Sun hides an extra planet so distant and dim that even the best ...