Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why
Vahe Peroomian, USC Dornsife College of Letters, Arts and Sciences You’re probably used to the month of February…
Why is Venus hotter than Mercury, when Mercury is closer to the Sun?
Vahe Peroomian, USC Dornsife College of Letters, Arts and Sciences Curious Kids is a series for children of…
Why are some stars always visible while others come and go with the seasons?
Stars near the north celestial pole circle the North Star, Polaris. Photographed in the Eastern Sierra Nevada, Calif.…