“We are all of us stars, and we deserve to twinkle.” – Marilyn Monroe
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A photograph of Saturn's moon Janus, 200 km across, taken by Cassini on September 25, 2006 🔭
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⚡️ Imagine looking down from the International Space Station and catching one of the rarest lightning events on Earth.
One year ago, astronaut Nichole Ayers captured the clearest image ever taken from above of a gigantic jet, a spectacular burst of upper-atmospheric lightning that can soar up to 60 miles (100 km) into the sky in just fractions of a second.
These fleeting flashes help scientists better understand our atmosphere and the powerful electrical processes happening above thunderstorms. Every rare observation brings us one step closer to unlocking their secrets.
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Barnard 68 is a dark nebula located 500 light-years away in the constellation Ophiuchus. It measures approximately 0.5 light-years across, and the temperature of its interior regions does not exceed 16 K (-257°C) due to the nebula's low transparency to radiation.
The nebula is completely opaque in the visible spectrum; however, as the observation range shifts toward the infrared, it becomes more transparent, allowing us to see an increasing number of stars that were previously obscured by it (Illustration 2).
You will very often see the caption "Boötes Void" beneath photos of this nebula. Do not believe this under any circumstances! Barnard 68 is an ordinary, relatively small (0.5 light-years) formation within our galaxy, situated quite close to the Solar System.
Voids, on the other hand, are gigantic empty spaces (spanning hundreds of millions of light-years) within the large-scale structure of the Universe, virtually devoid of galaxies and galaxy clusters. For instance, one of the largest discovered objects of this type—the Canes Venatici Supervoid—measures over a billion light-years across.
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When a Waterfall Catches Fire 🔥💧
For a few magical moments, the setting sun turns this waterfall into a glowing ribbon of fire against the dark granite cliffs. A breathtaking natural spectacle that looks almost unreal. 🌅✨
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Wonder of Science
