If the Sun is up but the sky is dark and the horizon is bright all around, you might be standing in the Moon’s shadow during a total eclipse of […]

In northern hemisphere spring, bright star Regulus is easy to spot above the eastern horizon. The alpha star of the constellation Leo, Regulus is the spiky star centered in this […]

Located some 3 million light-years away in the arms of nearby spiral galaxy M33, giant stellar nursery NGC 604 is about 1,300 light-years across. That’s nearly 100 times the size […]

How did a star form this beautiful nebula? In the middle of emission nebula NGC 6164 is an unusually massive star. The central star has been compared to an oyster’s […]

What created this giant X in the clouds? It was the shadow of contrails illuminated from below. When airplanes fly, humid engine exhaust may form water droplets that might freeze […]

Yes, but can your volcano do this? To the surprise of some, Mt. Etna emits, on occasion, smoke rings. Technically known as vortex rings, the walls of the volcano slightly […]

Watch Juno zoom past Jupiter. NASA’s robotic spacecraft Juno is continuing on its now month-long, highly-elongated orbits around our Solar System’s largest planet. The featured video is from perijove 16, […]

When the dark shadow of the Moon raced across North America on April 8, sky watchers along the shadow’s narrow central path were treated to a total solar eclipse. During […]

A jewel of the southern sky, the Great Carina Nebula is more modestly known as NGC 3372. One of our Galaxy’s largest star forming regions, it spans over 300 light-years. […]

From our vantage point in the Milky Way Galaxy, we see NGC 1232 face-on. Nearly 200,000 light-years across, the big, beautiful spiral galaxy is located some 47 million light-years away […]