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 ...

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...

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...

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...

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...

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. ...

From home this Full Moon looked bright . Around our fair planet it rose as the Sun set on April 7/8, the first Full Moon after the vernal ...

This surreal timelapse, landscape, panorama spans predawn, blue hour, and sunrise skies. Close to the start of planet Earth's norther...

Dark skies are disappearing from the world. With modernization comes artificial lighting that brightens the night. While these lights all...

What happens if you keep going north? The direction north on the Earth , the place on your horizon below the northern spin pole of the Eart...

Many spiral galaxies have bars across their centers. Even our own Milky Way Galaxy is thought to have a modest central bar . Prominently b...