SpaceTime

SpaceTime Series 26 Episode 137 - available wherever you get your podcasts or our website... spacetimewithstuartgary.com - enjoy and learn! #astronomy #space

#星空のご案内 🌌 ESO 217-25（マーメイド星雲 / Betta Fish Nebula） みなさん、夜空に浮かぶ壮大な宇宙の遺産をご紹介します ESO 217-25は、ケンタウルス座に位置する超新星残骸です 約1万4,000年前に大質量星が爆発した残骸（G296.5+10.0）のうち、光学的に最も明るく美しい部分がこの「マーメイド星雲」と呼ばれています 距離は地球から約4,500光年 全残骸は無線やX線で観測すると約120×85光年という巨大な広がりを持ち、青い酸素の輝くフィラメントと赤い衝撃波の複雑な構造が、まるで優雅に泳ぐ人魚のような姿を描き出しています この星雲は、星の死がもたらす激しい衝撃波と、宇宙空間に広がる希薄なガスが織りなす繊細な芸術作品です 星の生涯の終わりが、こうして美しい光のヴェールとなって私たちに届いています✨ 天文学の進歩により、こうした遠い過去の出来事を今、私たちは目にすることができます 宇宙の壮大さと儚さを、ぜひ感じてください ⚠️画像はNASA公式より引用 #ESO21725 #星のソムリエ

BREAKING: The Taliban have formally recognized child marriage under new rules, with specific guidelines for ‘virgin girls.’

Aurora in northern Germany, 2026-05-15, 2140 UTC (cause: coronal hole high-speed stream)

⁉️ How many of you know that the Arabs were offered half of the land (from the River to the Sea) in 1947-1948to establish a Palestinian State, and they refused?! 🪧 Be wary of the so-called "Nakba Day," commemorated by highly coordinated protests across the Western world tomorrow. 📚 They are not only misfiguring the truth about the historical proceedings that led to the most chronic conflict in the Middle East between Israel and the Arabs/Palestinians. 🇮🇱 They are using their made-up story about the establishment of the state of Israel as a "victimhood" platform that justifies the practice of terrorism in the Middle East, and antisemitism against the Jews in Western countries, as part of their larger mission to destroy Western Liberal Democracies. 📺 Watch my comments to Fox News in the link below in this thread.

In 1992, Denmark accepted 321 Palestinian refugees. By 2019, 64% of them had been convicted of at least one crime. Among their children, 34% had also received criminal convictions. (Source: Danish Ministry for Immigration and Integration)

“WE WILL BEHEAD YOU ONE BY ONE, YOU DIRTY JEWS” Muslims in London threatening to behead Jews. This is the “Free Palestine” terrorist movement.

Added exclusive details on the Soyuz technical history to several recent missions, including on the MS-14 sensor issue that triggered fleet-wide upgrades ( subscription). Updates: russianspaceweb.com/site_update.ht…

ABC lies about everything: Russian collusion hoax, Joe Biden dementia, Hunter Biden laptop, George Pell, Gaza Hospital bombing, Charlottesville fine people hoax, Covington kids, fake Trump Jan 6 speech, fake Heston Russell Afghan gunshots, ABC/RMIT bias fact checkers. ABC lies.

Commentary | The public broadcaster’s distorted reporting contributed to a climate of hostility to Jews. Read the full comment: bit.ly/493u0V6

An amazing close-up of a sunspot captured by the Vacuum Tower Telescope. (Credit: T.Rimmele (NSO), M.Hanna (NOAO)/AURA/NSF)

A moderate (G2) geomagnetic storm is currently in progress. Aurora sky watchers should remain alert once dark outside. SolarHam.com

What actually happens if you fall into a black hole? First, time begins slowing down around you while gravity becomes insanely strong. Cross the event horizon and escape becomes impossible forever. As you fall deeper, the black hole stretches your body longer and thinner in a brutal process called spaghettification until you finally reach the singularity, a place where our understanding of physics completely breaks apart.

Dark matter remains one of the central unresolved problems in cosmology. We see its gravitational influence in galaxy rotation curves, gravitational lensing, galaxy clusters, and the large-scale structure of the Universe, but we still do not know what it is made of. In the standard cosmological model, dark matter is usually treated as cold and collisionless: its particles move relatively slowly compared with light and pass through one another without interacting, except through gravity. That framework, Lambda Cold Dark Matter, works very well on large cosmic scales, but it can run into tension when we look at smaller, denser structures. A new idea focuses on self-interacting dark matter, or SIDM. In this model, dark matter particles do not simply ignore one another. They can collide, exchange energy, and gradually reshape the internal structure of dark matter halos. Under the right conditions, these interactions can trigger what is called gravothermal collapse, causing dark matter to contract into very dense, compact clumps. The study suggests that these clumps could have masses of roughly a million Suns and might explain several puzzling observations that standard cold dark matter has difficulty accounting for. What makes the proposal interesting is that the same mechanism could help explain three apparently separate astrophysical mysteries. The first involves the gravitational lens system JVAS B1938+666, where a distant galaxy is distorted into an Einstein-ring-like structure by the gravity of a foreground galaxy. Observations suggest there is an additional very dense object perturbing the lensing pattern, but its nature is not obvious. A compact clump of self-interacting dark matter could provide the required gravitational influence without needing to be a normal luminous object. The second case concerns the GD-1 stellar stream, a long stream of old, metal-poor stars in the Milky Way halo. GD-1 shows gaps and a spur, as if something massive and compact passed through it and disturbed the stream. This kind of feature can act like a fossil record of an invisible gravitational encounter. A dense SIDM clump could be the unseen perturber that carved those irregularities into the stream. The third case is Fornax 6, a globular cluster in the Fornax dwarf galaxy, one of the Milky Way’s satellite galaxies. Fornax has an unusually rich population of globular clusters for a dwarf galaxy, and Fornax 6 is especially interesting because it is more metal-rich and likely younger than the others. The study proposes that a dense dark matter clump could act as a gravitational trap, sweeping up passing stars and helping form or preserve such a compact stellar system. The broader implication is not that dark matter has been “solved,” but that self-interacting dark matter may offer a common explanation for small-scale structures that otherwise look unrelated: an anomaly in a distant gravitational lens, a scar in a Milky Way stellar stream, and an unusual star cluster in a nearby satellite galaxy. That is scientifically attractive because a good model should not only explain one isolated object after the fact; it should connect different phenomena through the same physical mechanism. Here, the proposed mechanism is the formation of dense, core-collapsed SIDM halos. Still, this remains a theoretical interpretation, not a direct detection of dark matter particles. The value of the work is that it makes self-interacting dark matter more testable: if such dense clumps exist, they should leave gravitational fingerprints in lensing systems, stellar streams, and satellite galaxies. Future observations could therefore strengthen or weaken the case. For now, the study adds to a growing argument that dark matter may not be completely passive and collisionless. It may have its own internal physics, and that hidden physics could be written into the structure of galaxies. 👉 share.google/gC0f1lgDyKdRA9…

The “Nakba” was when an Arab paramilitary group led by a former colonel in the Nazi Wehrmacht - with an official emblem featuring a sword stabbing a Jewish Star of David - failed to carry out a second Holocaust against Jews three years after the Nazi Holocaust

Spectacular: this is just a small window into N159, a star-forming complex stretching 150 light-years across. Some young stars stay wrapped in glowing gas; others sit inside hollow shells, shaped by powerful winds and intense radiation (Credit: ESA/Hubble & NASA, R. Indebetouw)

Wallpaper 2560x1440 pixel. 📸🚀 #Buran #AIart️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️

Transporting the Buran orbital orbiter to the Baikonur Cosmodrome