How big is our universe? This very question, among others, was debated by two leading astronomers 100 years ago today in what has become known as astronomy’s Great Debate. Many […]

These bright ridges of interstellar gas and dust are bathed in energetic starlight. With its sea of young stars, the massive star-forming region NGC 2014 has been dubbed the Cosmic […]

Watch this video. In only a minute or so you can explore the night skies around planet Earth through a compilation of stunning timelapse sequences. The presentation will take you […]

Earth’s annual Lyrid Meteor Shower peaked before dawn yesterday, as our fair planet plowed through debris from the tail of long-period comet Thatcher. In crisp, clear and moonless predawn skies […]

No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth. Instead, the shadow line or terminator […]

Have you ever had stars in your eyes? It appears that the eye on the left does, and moreover it appears to be gazing at even more stars. The featured […]

To some, it looks like a giant chicken running across the sky. To others, it looks like a gaseous nebula where star formation takes place. Cataloged as IC 2944, the […]

It was just another day on aerosol Earth. For August 23, 2018, the identification and distribution of aerosols in the Earth’s atmosphere is shown in this dramatic, planet-wide digital visualization. […]

Stars can’t turn these old wooden arms, but it does look like they might in this scene from a rotating planet. The well-composed night skyscape was recorded from Garafia, a […]

Cruising through the inner solar system, Comet ATLAS C2019/Y4 has apparently fragmented. Multiple separate condensations within its diffuse coma are visible in this telescopic close-up from April 12, composed of […]