Astronomy Picture of the Day . Equinox: The Sun from Solstice to Solstice . ... Tomorrow, and every day until the next equinox, the night will be longer than the day in Earth's northern hemisphere, and the day will be longer than the night in Earth's southern hemisphere. ... Located just 500 light-years away toward the constellation Scorpius, this star is only slightly less massive and a little cooler than the Sun. ... MACSJ0025: Two Giant Galaxy Clusters Collide . ... The Heart and Soul Nebulas . ...