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iotman (4)in #science • 2 days ago
🌌 SpacePicture of a Day: NGC 6960: The Witch's Broom Nebula 🪐
Ten thousand years ago, before the dawn of recorded human history, a new light would suddenly have appeared in the night sky and faded after a few weeks. Today we know this…
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iotman (4)in #science • 3 days ago
🌌 SpacePicture of a Day: Comet Lemmon Brightens 🪐
Comet Lemmon is brightening and moving into morning northern skies. Besides Comet SWAN25B and Comet ATLAS, Comet C/2025 A6 (Lemmon) is now the third comet currently visible with…
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iotman (4)in #science • 4 days ago
🌌 SpacePicture of a Day: Two Camera Comets in One Sky 🪐
It may look like these comets are racing, but they are not. Comets C/2025 K1 ATLAS (left) and C/2025 R2 SWAN (right) appeared near each other by chance last week in the featured…
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iotman (4)in #science • 5 days ago
🌌 SpacePicture of a Day: Leopard Spots on Martian Rocks 🪐
What is creating these unusual spots? Light-colored spots on Martian rocks, each surrounded by a dark border, were discovered last year by NASA's Perseverance Rover currently…
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iotman (4)in #science • 6 days ago
🌌 SpacePicture of a Day: A Rocket in the Sun 🪐
On the morning of September 24 a rocket crosses the bright solar disk in this long range telescopic snapshot captured from Orlando, Florida. That's about 50 miles north of its…
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iotman (4)in #science • 8 days ago
🌌 SpacePicture of a Day: Saturn Opposite the Sun 🪐
This year Saturn was at opposition on September 21, opposite the Sun in planet Earth's sky. At its closest to Earth, Saturn was also at its brightest of the year, rising as the…
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iotman (4)in #science • 9 days ago
🌌 SpacePicture of a Day: GW250114: Rotating Black Holes Collide 🪐
It was the strongest gravitational wave signal yet measured -- what did it show? GW250114 was detected by both arms of the Laser Interferometer Gravitational-wave Observatory…
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iotman (4)in #science • 10 days ago
🌌 SpacePicture of a Day: NGC 6357: Cathedral to Massive Stars 🪐
How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of…
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iotman (4)in #science • 11 days ago
🌌 SpacePicture of a Day: Equinox at Saturn 🪐
On Saturn, the rings tell you the season. On Earth, today marks an equinox, the time when the Earth's equator tilts directly toward the Sun. Since Saturn's grand rings orbit…
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iotman (4)in #science • 12 days ago
🌌 SpacePicture of a Day: Equinox Sunset 🪐
Does the Sun set in the same direction every day? No, the direction of sunset depends on the time of the year. Although the Sun always sets approximately toward the west, on an…
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iotman (4)in #science • 13 days ago
🌌 SpacePicture of a Day: Gibbous vs Crescent 🪐
rly risers around planet Earth have enjoyed a shining crescent Moon near brilliant Venus, close to the eastern horizon in recent morning twilight skies. And yesterday, on…
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iotman (4)in #science • 14 days ago
🌌 SpacePicture of a Day: The NGC 6914 Complex 🪐
A study in contrasts, this colorful cosmic skyscape features stars, dust, and glowing gas in the vicinity of NGC 6914. The interstellar complex of nebulae lies some 6,000…
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iotman (4)in #science • 15 days ago
🌌 SpacePicture of a Day: Comet C/2025 R2 (SWAN) 🪐
A new visitor from the outer Solar System, comet C/2025 R2 (SWAN) also known as SWAN25B was only discovered late last week, on September 11. That's just a day before the comet…
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iotman (4)in #science • 16 days ago
🌌 SpacePicture of a Day: Nebulas and Clusters in Sagittarius 🪐
Can you spot famous celestial objects in this image? 18th-century astronomer Charles Messier cataloged only two of them: the bright Lagoon Nebula (M8) at the bottom, and the…
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iotman (4)in #science • 17 days ago
🌌 SpacePicture of a Day: New Comet SWAN25B over Mexico 🪐
A newly discovered comet is already visible with binoculars. The comet, C/2025 R2 (SWAN) and nicknamed SWAN25B, is brightening significantly as it emerges from the Sun's…
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iotman (4)in #science • 20 days ago
🌌 SpacePicture of a Day: Star Trails over One-Mile Radio Telescope 🪐
The steerable 60 foot diameter dish antenna of the One-Mile Telescope at Mullard Radio Astronomy Observatory, Cambridge, UK, is pointing skyward in this evocative night-skyscape.…
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iotman (4)in #science • 21 days ago
🌌 SpacePicture of a Day: Lunar Eclipse in Two Hemispheres 🪐
September's total lunar eclipse is tracked across night skies from both the northern and southern hemispheres of planet Earth in these two dramatic timelapse series. In the…
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iotman (4)in #science • 22 days ago
🌌 SpacePicture of a Day: The Umbra of Earth 🪐
The dark, inner shadow of planet Earth is called the umbra. Shaped like a cone extending into space, it has a circular cross section most easily seen during a lunar eclipse. And…
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iotman (4)in #science • 23 days ago
🌌 SpacePicture of a Day: The Great Lacerta Nebula 🪐
It is one of the largest nebulas on the sky -- why isn't it better known? Roughly the same angular size as the Andromeda Galaxy, the Great Lacerta Nebula can be found toward the…
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iotman (4)in #science • 24 days ago
🌌 SpacePicture of a Day: Up from the Earth: Gigantic Jet Lightning 🪐
What's that rising up from the Earth? When circling the Earth on the International Space Station early in July, astronaut Nicole Ayers saw an unusual type of lightning rising up…
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