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Sciences and Exploration Directorate
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JWST Observations Show Interstellar Object 3I/ATLAS Has an Unusually CO2-Rich Coma

Explore this and other groundbreaking work from the Sciences and Exploration Directorate in our Science Nuggets collection.

JWST Observations Show Interstellar Object 3I/ATLAS Has an Unusually CO2-Rich Coma

Explore this and other groundbreaking work from the Sciences and Exploration Directorate in our Science Nuggets collection.

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NASA, JAXA XRISM Satellite X-rays Milky Way’s Sulfur

Explore this and other groundbreaking work from the Sciences and Exploration Directorate in our Science Nuggets collection.

NASA, JAXA XRISM Satellite X-rays Milky Way’s Sulfur

Explore this and other groundbreaking work from the Sciences and Exploration Directorate in our Science Nuggets collection.

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ASTRONOMY PICTURE OF THE DAY

The Horsehead Nebula

Sculpted by stellar winds and radiation, this dusty interstellar molecular cloud has by chance has assumed an immediately recognizable shape. Fittingly known as The Horsehead Nebula, it lies some 1,500 light-years distant, embedded in the vast Orion cloud complex. About five light-years "tall," the dark cloud is cataloged as Barnard 33, first identified on a photographic plate taken in the late 19th century. B33 is visible primarily because its obscuring dust is silhouetted against the glow of emission nebula IC 434. Hubble space telescope images from the early 21st century find young stars forming within B33. Of course, the magnificent interstellar cloud will slowly shift its apparent shape over the next few million years. But for now the Horsehead Nebula is a rewarding though difficult object to view with small telescopes from planet Earth.

Earth Observatory Picture

Ash Streams from Klyuchevskaya Sopka