How big is our universe? This very question, among others , was debated by two leading astronomers 100 years ago today in what has become k...

These bright ridges of interstellar gas and dust are bathed in energetic starlight. With its sea of young stars, the massive star-forming ...

The Susquehanna River cuts through the folds of the Valley-and-Ridge province of the Appalachian Mountains in this photograph taken by the ...

Watch this video. In only a minute or so you can explore the night skies around planet Earth through a compilation of stunning timelapse se...

On the northwestern coast of Madagascar, the salty waters of the Mozambique Channel penetrate inland to join with the freshwater outflow of...

Earth's annual Lyrid Meteor Shower peaked before dawn yesterday, as our fair planet plowed through debris from the tail of long-period...

No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth . Inste...

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. T...

Fifty years ago, on April 22, 1970, people around the world marked the first Earth Day. from NASA https://ift.tt/3eCY1xa

To some, it looks like a giant chicken running across the sky. To others, it looks like a gaseous nebula where star formation takes plac...

It was just another day on aerosol Earth. For August 23, 2018, the identification and distribution of aerosols in the Earth's atmosph...

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...

Cruising through the inner solar system, Comet ATLAS C2019/Y4 has apparently fragmented . Multiple separate condensations within its diffu...

It was an astronomical triple play. Setting on the left, just after sunset near the end of last month, was our Moon -- showing a bright cr...

This image shows sample site Nightingale Crater, OSIRIS-REx’s primary sample collection site on asteroid Bennu. from NASA https://ift.tt/...

NGC 253 is one of the brightest spiral galaxies visible, but also one of the dustiest. Dubbed the Silver Coin for its appearance in smallt...

Equipped with visionary science instruments, the Mars Perseverance rover underwent an "eye" exam after several cameras were insta...

How did this big rock end up on this strange terrain? One of the more unusual places here on Earth occurs inside Death Valley , Californi...

While drifting through the cosmos, a magnificent interstellar dust cloud became sculpted by stellar winds and radiation to assume a recogn...

Shared around world in early April skies Venus, our brilliant evening star, wandered across the face of the lovely Pleiades star cluster. ...