Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.

You're not imaging it. The sun has been rising later in Illinois following the winter solstice. But the days aren't getting ...

The winter solstice, famously the shortest day of the year, is nearly three weeks behind us. So why has the sun been rising later than it did on Dec. 21? Like much of our day and night cycles, the ...

Since Pluto is located so far from the sun, it takes around 248 Earth years for Pluto to orbit the sun. Pluto's orbit around the sun is not only a very long journey, it's also elliptical, resembling a ...