As the Northern Hemisphere welcomes spring today, the Southern Hemisphere is marked with the first day of autumn.

all defining the line of the ecliptic in the cold winter sky this night. Alan Dyer/Getty Images The solar system has eight planets overall – Mercury, Venus, Earth, Mars, Jupiter, Saturn ...

The winter sky has some brightly lit star patterns visible this month, including a triangle featuring Mars at one of its points, making it worthwhile to brave the winter temperatures for stargazing.

Spring officially begins in the Northern Hemisphere on March 20 with the vernal equinox as the entire world experiences an ...