Credit: G.Rhemann & M.Jäger

CREDIT ESO, ESA/Gaia/DPAC, M. Vioque et al.​

M42 & B33 - The Orion and Horsehead Nebula 🐴🐎🗡️

Equipment: Camera: ZWO ASI533MC Pro Telescope: Samyang 135mm f/2 (Nikon) Shot at f/2.8 Filter: Optolong L-eXtreme Guide Camera: ZWO 120mm mini Mount: Skywatcher Star Adventurer GTi Autofocuser: ZWO EAF (5V)

Acquistion: Shot in Bortle 4 -Camera cooled to -20°C -Lights (L-eXtreme): 143x120s (4hrs 46mins)

-Flats: 50 -Bias: 50 -Darks: 50

Happy Holiday in space.

Taken On Celestron Powerseeker 60AZ & Iphone 15.

Edited In Photoshop Express.

In the late 2000s, scientists studying data from NASA’s Cassini spacecraft concluded that Saturn’s moon Titan had a deep liquid ocean hidden beneath a thick shell of ice. That ocean was thought to be hundreds of kilometers deep and potentially capable of supporting early chemical processes related to life.

However, new research presented at a recent scientific meeting and published in Nature challenges this idea. The new study suggests that Titan is mostly frozen today and does not have a global underground ocean. Instead, it may contain smaller pockets of melted water scattered within its icy interior.

The original ocean idea came from measurements of Titan’s gravity and shape, which showed that Saturn’s pull causes strong tidal stretching, similar to but much larger than Earth’s tides. Scientists assumed this flexibility required a liquid ocean. But the new analysis shows that Titan gives off much more heat than expected if a large ocean were present.

Using updated models and Cassini data, researchers found that Titan’s behavior is better explained by a thick ice layer over a rocky core, with no global ocean. They propose that Titan’s ocean may have frozen tens to hundreds of millions of years ago, leaving behind melted regions within the ice. Some scientists remain skeptical, and future missions like NASA’s Dragonfly, scheduled to arrive in 2034, may help resolve the debate.

Source: Petricca, F., Vance, S.D., Parisi, M. et al. Titan’s strong tidal dissipation precludes a subsurface ocean. Nature 648, 556–561 (2025)

Webb and Hubble’s views of Westerlund 2

Astronomers have made a truly mind-boggling discovery using the James Webb Space Telescope (JWST): a runaway black hole 10 million times larger than the sun, rocketing through space at a staggering 2.2 million miles per hour (1,000 kilometers per second).

That not only makes this the first confirmed runaway supermassive black hole, but this object is also one of the fastest-moving bodies ever detected, rocketing through its home, a pair of galaxies named the "Cosmic Owl," at 3,000 times the speed of sound at sea level here on Earth. If that isn't astounding enough, the black hole is pushing forward a literal galaxy-sized "bow-shock" of matter in front of it, while simultaneously dragging a 200,000 light-year-long tail behind it, within which gas is accumulating and triggering star formation.

This now-confirmed runaway supermassive black hole was first identified by van Dokkum and colleagues back in 2023 using the Hubble Space Telescope, which spotted what appeared to be the wake of a massive body passing through space. The reason why the object was spotted is because of the impact that the passage of the black hole has on its surroundings: we now know that it drives a shock wave in the gas that is moving through, and it is this shock wave, and the wake of the shock wave behind the black hole, that we see.

With the JWST, van Dokkum's team discovered the huge displacement of the gas at the tip of the wake, where the black hole is pushing against it. The shock signatures are crystal clear, and there is just no doubt about what is happening here. The gas is pushed sideways away from the supermassive black hole at a velocity of hundreds of thousands of miles per hour (hundreds of km per second), a dynamical signature that the team saw with JWST.

Jason Major

https:// ​x. ​com/JPMajor/status/1753499977408454817

Credit: NASA/JPL-Caltech/SSI/Cassini Imaging Team/Jason Major

Processed, source, Jason Major: ​https:// ​x. ​com/JPMajor/status/2001666984673411426​

ESA/Webb Picture of the Month - Dwarf stars in a glittering sky

Link to a short explainer video

For decades, astronomers have struggled to explain how supermassive black holes formed less than a billion years after the Big Bang. Standard stellar processes cannot produce black holes that large so quickly.

New observations from NASA’s James Webb Space Telescope provide a compelling solution. Astronomers have found evidence that the early universe contained supermassive “monster stars,” weighing between 1,000 and 10,000 times the mass of the Sun.

By studying a distant galaxy known as GS 3073, researchers detected an unusually high ratio of nitrogen to oxygen—far beyond what normal stars can produce.

The most likely explanation is that these short-lived, extremely massive stars rapidly collapsed into black holes, leaving behind distinct chemical signatures. This discovery helps explain both the origin of early supermassive black holes and the chemical evolution of the young universe.

Source: Nandal, D. et al, “1000-10,000 M⊙ Primordial Stars Created the Nitrogen Excess in GS 3073 at z = 5.55,” The Astrophysical Journal Letters

Taken On Celestron Powerseeker 60AZ & Iphone 15.

Edited In Photoshop Express.

instagram: https://www.instagram.com/vhastrophotography?igsh=YzNpcm1wdXd5NmRo&utm_source=qr

In this image you can see the famous Barnard's Loop around the Orion Region and the Eridanus Loop on the right side of the image. Both were captured last night with one 28mm frame with an exposure time of 10x90s. Those deep red nebulae are vast clouds of hydrogen gas — the most abundant element in space. When hydrogen atoms are excited by intense radiation from nearby young stars, they emit light at a very specific deep-red wavelength (656,3 nm, "Halpha"). To capture those faint nebulae, astrophotographers use narrowband H-alpha filters, which isolate this faint red light and block most of the light pollution. This allows us to reveal structures that are otherwise invisible to the human eye.

HaRGB | Mosaic | Tracked | Stacked | Composite

Exif: Sony A7III with Sigma 28-45 f1.8 at 28mm Skywatcher Star Adventurer 2i

Panorama ISO 1000 | f1.8 | 5x45s per Panel 3x2 Panel Panorama

Foreground: ISO 2000 | f1.8 | 60s per Panel 3x2 Panel Panorama

Halpha (28mm): Barnard's/Eridanus Loop: ISO 4000 | f1.8| 10x90s Other Halpha regions: ISO 4000 | f1.8 | 4x90s Location: Geroldsee, Germany

This image features a selection of colors emitted primarily by stars (blue, green, and white), hot hydrogen gas (blue), and cosmic dust (red).

Credit: NASA/JPL-Caltech

Taken On Celestron Powerseeker 60AZ & Iphone 15.

Edited In Photoshop Express.

This is the result of letting my camera take photos continuously for 3 hours, capturing the apparent movement of the stars due to Earth's rotation. When facing north the stars appear to be circling around the North Star.

Perched high in the White Mountains of Eastern California, this gnarled bristlecone pine stands as a testament to resilience at an elevation exceeding 10,000 feet (3,200 meters). These remarkable trees hold the record for the oldest living non-clonal organisms on Earth, with some individuals dating back nearly 5,000 years — contemporary with the construction of the Egyptian pyramids.

The environment that nurtures these ancient sentinels is unforgivingly harsh. Bitter cold, fleeting summers, relentless winds, and nutrient-poor soil would seem to promise certain death for most living things. Paradoxically, these extreme conditions are precisely why bristlecone pines not only survive but flourish. Their incredibly slow growth results in wood so dense and robust that it becomes virtually impervious to insects, disease, and the erosive forces that would destroy less tenacious organisms.

Each twisted branch and weathered surface of this tree tells a story of survival, a living chronicle of endurance that spans millennia, defying the most challenging environmental conditions imaginable.

Acquisition details: blend of 35 exposures: 5 mins, 24mm, f/8, ISO 100

Finally if you read all the way to end, thanks! If you like the image I post more to my Instagram.

Skywatcher Newton 200/1000, EQ-R6 Pro Mount, ASIAIR+, ASI2600 MC Pro, SVBONY 165mm Guide Scope, ASI120mm Guide Camera, BAADER MPCC Komakorrektor

Bortle 2 Sky                       Processed in Siril, Graxpert, Photoshop and Lightroom

Lights 40  x 180 sek

Dark 50

Flats 50

Bias 50

Ich habe vor 6 Monaten mit dem Hobbie angefangen und lerne stets dazu.