16 Nov 2025, 13:06 UTC773 views12 reactionsread 6 August 2026 Crossing Saturn's Ring Plane
2025-11-16
If this is Saturn, where are the rings? When Saturn's "appendages" disappeared in 1612, Galileo did not understand why. Later that century, it became understood that Saturn 's unusual protrusion s were rings and that when the Earth crosses the ring plane, the edge-on rings will appear to disappear. This is because Saturn's rings are confined to a plane many times thinner, in …
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1 Oct 2025, 13:05 UTC646 views10 reactionsread 6 August 2026 NGC 6960: The Witch's Broom Nebula
2025-10-01
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 light was from a supernova, or exploding star, and record the expanding debris cloud as the Veil Nebula, a supernova remnant. This sharp telescopic view is centered on a western segment of the Veil N…
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29 Sept 2025, 09:52 UTC360 views1 reactionsread 6 August 2026 Photo
Two Camera Comets in One Sky
2025-09-29
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 image taken from France's Reunion Island in the southern Indian Ocean. Fainter Comet ATLAS is approaching our Sun and will reach its closest approach in early October when it is also expected to be it…
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27 Sept 2025, 13:05 UTC296 views6 reactionsread 6 August 2026 Photo
A Rocket in the Sun
2025-09-27
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 Kennedy Space Center launch site. This rocket carried three new space weather missions to space. Signals have now been successfully acquired from all three - NASA's Interstellar Mapping and Acceleration Probe, N…
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26 Sept 2025, 13:10 UTC231 views3 reactionsread 6 August 2026 Photo
A SWAN, an ATLAS, and Mars
2025-09-26
A new visitor to the inner Solar System, comet C/2025 R2 (SWAN) sports a long ion tail extending diagonally across this almost 7 degree wide telescopic field of view recorded on September 21. A fainter fellow comet also making its inner Solar System debut, C/2025 K1 (ATLAS), can be spotted above and left of SWAN's greenish coma, just visible against the background sea of stars …
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25 Sept 2025, 09:04 UTC203 views8 reactionsread 6 August 2026 Photo
Saturn Opposite the Sun
2025-09-25
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 Sun set and shining above the horizon all night long among the fainter stars of the constellation Pisces. In this snapshot from the Qinghai Lenghu Observatory, Tibetan Plateau, southwestern China, the outer…
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24 Sept 2025, 09:09 UTC196 views8 reactionsread 6 August 2026 Photo
GW250114: Rotating Black Holes Collide
2025-09-24
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 (LIGO) in Washington and Louisiana USA earlier this year. Analysis showed that the event was created when two black holes, each of mass around 33 times the mass of the Sun, coalesced into one l…
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23 Sept 2025, 08:28 UTC163 views4 reactionsread 6 August 2026 NGC 6357: Cathedral to Massive Stars
2025-09-23
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 our Sun, making it one of the most massive stars known. This star is the brightest object located in the central cavity near the bottom center of the featured image taken with the Webb Space Te…
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22 Sept 2025, 09:18 UTC138 views3 reactionsread 6 August 2026 Photo
Equinox at Saturn
2025-09-22
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 along the planet's equator, these rings appear most prominent -- from the direction of the Sun -- when the spin axis of Saturn points toward the Sun. Conversely, when Saturn 's spin axis points to the side, an equin…
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21 Sept 2025, 10:21 UTC140 views4 reactionsread 6 August 2026 Photo
Equinox Sunset
2025-09-21
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 equinox like today the Sun sets directly toward the west. After tomorrow's September equinox, the Sun will set increasingly toward the southwest, reaching its maximum displacement at the December solstice. Before to…
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20 Sept 2025, 11:33 UTC121 views1 reactionsread 6 August 2026 Photo
Gibbous vs Crescent
2025-09-20
Early 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 September 19, skygazers watching from some locations in Earth's northern hemisphere were also able to witness Venus, in the inner planet's waxing gibbous phase, pass behind the Moon's waning crescent. In fact, this…
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18 Sept 2025, 09:14 UTC133 views6 reactionsread 6 August 2026 Comet C/2025 R2 (SWAN)
2025-09-18
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 day before the comet reached perihelion, its closest approach to the Sun. First spotted by Vladimir Bezugly in images from the SWAN instrument on the sun-staring SOHO spacecraft, the comet was surprisingly bright but understandably…
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Showing the 12 most recent of 20 posts we hold for @apodhub. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.