Happy Holidays! (from me, to you)

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Happy Holidays! (from me, to you)

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Supernova Remnant Cassiopeia A
Credits: NASA, ESA, CSA, STScI
Milky Way photographed in Sponheim (Rhineland-Palatinate, Germany) by Tobias Huch. Shared under the Creative Commons Attribution-Share Alike 4.0 International license; feel free to adapt, remix, or share!
Surprising Scattering in Stealthy Structures
Experiments shed light on the uncertain optical response of so-called stealthy hyperuniform materials. [...] Stealthy hyperuniform materials are disordered structures that look uniform on large length scales. This property suggests that, within a certain range of wavelengths, the structures should be transparent to light, allowing it to pass through without scattering. But experimentally testing that prediction has been difficult because doing so requires large, precisely controlled samples. Now Mikael Rechtsman at Pennsylvania State University and his colleagues have overcome that challenge [1]. They have demonstrated that stealthy hyperuniform materials can scatter light within the wavelength range typically associated with transparency. The results highlight the subtle interplay between structure, disorder, and photon loss in determining how materials affect the propagation of light.
Read more.

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International Day of Light 2026
Light for a Sustainable Future.
#lightday2026
HAPPY MOTHER'S DAY! Girls & Robots
https://tinyurl.com/yc6zj8ew
Earthset
The Artemis II crew captured this view of an Earthset on April 6, 2026, as they flew around the Moon. The image is reminiscent of the iconic Earthrise image taken by astronaut Bill Anders 58 years earlier as the Apollo 8 crew flew around the Moon. The Apollo 8 mission was the first crewed spacecraft to circumnavigate the Moon.
For more imagery from the mission, visit our Artemis II Multimedia Page.
That's us, together.
While we're looking up at the Artemis II astronauts journeying to the Moon, they're looking back home at us.Â
In this image, Earth peeks through the capsule window, reminding us that a view like this relies on the ingenuity and hard work of countless people back home.
In the second image, we see our home planet as a whole, lit up in spectacular blues and browns. A green aurora even lights up the atmosphere.
Follow the Artemis II astronauts on their journey to the Moon:

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Artemis II Launch: April 1st 2026
l Time l NASA Artemis ‖
Let's celebrate!
🌍🔸️🧬🧫🧪🧲💉⚖️
International Day of Women and Girls in Science👏🫶👏
Last year's conference:
An astronaut-led panel to highlight the contributions of women and girls in science, and the importance of ensuring that they are safe from
Interstellar comet 3I/ATLAS is only the third object we've ever seen passing through our solar system from elsewhere in the galaxy. 3I/ATLAS doesn't pose a threat to Earth, and the closest it'll get to our home planet (on Dec. 19) is about 170 million miles—nearly twice the distance between Earth and the Sun.
That doesn't mean our scientists aren't keeping a close eye on it, though! Interstellar objects like 3I/ATLAS give us a unique opportunity to learn more about what solar systems beyond ours are made of, so NASA spacecraft, satellites, and even our Mars rovers have been watching the comet as it arcs through our neighborhood.
This image of 3I/ATLAS was taken by our Hubble Space Telescope on Nov. 30, when the comet was about 178 million miles from Earth. Follow the latest updates on our 3I/ATLAS blog.
Make sure to follow us on Tumblr for your regular dose of space!

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Milky Way Anatomy
If we could see our galaxy, the Milky Way, from the outside, it would look like an enormous, bedazzled pinwheel. Vast sprays of stars form spiral arms that curl outward from a bright center that bulges like the yolk in a fried egg. Dark, dusty tendrils darken some regions, while glowing pink gas clouds light up others.
We have a pretty good idea of the Milky Way’s overall structure, but since we’re nestled inside it, fine details are hard to see. Those clouds of gas and dust strewn throughout interstellar space block our view, especially of the far side of the galaxy.  Astronomers have used observations from different telescopes to piece together our galaxy's anatomy. Let's scrub up and dive in!
NGC 7293, Helix