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Blue jets, red sprites and other flashes
In recent years, the International Space Station has given astronauts the chance to photograph transient luminous events - or TLEs - natural light shows produced at the tops of thunderstorms.
October 26, 2017
Webcam surveys high clouds on Mars
A webcam on ESA’s Mars Express has acquired an unprecedented catalog of more than 21,000 images, providing a global survey of unusual, high-altitude, martian clouds.
October 26, 2017
Airglow over Little Grand Canyon, Utah
The light of excited atoms and molecules, high over Utah's own smaller version of the Grand Canyon.
October 26, 2017
Wayward moon receding from Earth
As you view our companion world tonight, ponder on the rich history and intriguing future of our planet Earth and its wayward moon!
October 26, 2017
The low autumn evening crescent
Or high spring crescent, if you're in the South Hemisphere!
October 26, 2017
International Observe the Moon Night is this week
International Observe the Moon Night is a global, public event coming up on October 16, 2021. Here's how you can participate online or in person.
October 25, 2017
Fornax Galaxy Cluster reveals its secrets
This new 2.3-gigapixel image of the Fornax Galaxy Cluster - one of the largest images ever released by European Southern Observatory - might make you feel small.
October 25, 2017
How the universe creates gold
Finally, scientists know how the universe makes gold. They've seen it created in the cosmic fire of 2 colliding stars via the gravitational wave they emitted.
October 25, 2017
Lone fisherman at Echo Lake
A fisherman at Echo Lake, New Hampshire, surrounded by the colors of this year's beautiful autumn.
October 25, 2017
Moon-gazing tonight? Think of Pluto
Tonight and tomorrow - October 25 and 26, 2017 - the waxing crescent moon shines in the same part of the sky as tiny, fascinating Pluto.
October 25, 2017
