Our universe through the lens of keiki, interns and an expert

This movie still captures the moons Mimas, Enceladus and Dione as they begin their race across Saturn's disk. The still is from a movie created from images taken by NASA/ESA Hubble Space Telescope. It reveals the planet's rings tilted nearly edge-on toward the Sun, an event that occurs once every 15 years. Because of this special alignment, the moons cast shadows on the planet and its rings.

Flaring, active regions of our sun are highlighted in this new image combining observations from several telescopes. High-energy X-rays from NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) are shown in blue, low-energy X-rays from Japan’s Hinode spacecraft are green and extreme ultraviolet light from NASA’s Solar Dynamics Observatory (SDO) is yellow and red. All three telescopes captured their solar images about the same time April 29, 2015. The NuSTAR image is a mosaic made from combining smaller images.

Astronomy is often thought of as a time machine: as we look farther and farther back in the universe, we are looking further and further back in time, seeing how things looked sometimes billions of years ago.