This year, Mars reaches its long-awaited opposition on July 27—and is visible all night. Look for its south polar cap and dark features that shift as the planet rotates. You will also spot constellations Scorpius and Sagittarius, and the annual Delta Aquarid meteor shower.... Read More

This animation shows the remnant of Kepler’s Supernova, shown first in infrared, then visible, then low energy X-ray, then high-energy X-ray emission and finally in combination.... Read More