From the cosmos, to you.https://sorabumi.jp/https://sorabumi.jp/en/psyche-gravity-assist-mars-flyby/https://sorabumi.jp/en/psyche-gravity-assist-mars-flyby/In May 2026, NASA's Psyche spacecraft flew past Mars and gained 4 km/s of speed without burning a drop of fuel. Here's how gravity assist works, why it matters, and the 50-year history behind this elegant trick of orbital mechanics.Tue, 19 May 2026 00:00:00 GMThttps://sorabumi.jp/en/jwst-cosmic-web-structure/https://sorabumi.jp/en/jwst-cosmic-web-structure/Galaxies don't float around randomly. They line up along thread-like structures called filaments, tied together at knots called galaxy clusters. JWST's COSMOS-Web survey has now produced the highest-resolution map of this cosmic web ever made, reaching back to just one billion years after the Big Bang.Mon, 18 May 2026 00:00:00 GMThttps://sorabumi.jp/en/change7-moon-south-pole-water/https://sorabumi.jp/en/change7-moon-south-pole-water/China's Chang'e 7 launches in August 2026, heading for the lunar south pole on a mission to collect water ice directly. Here's why lunar water matters so much — from the strange physics of permanently shadowed craters to what it means for the future of space exploration.Sun, 17 May 2026 00:00:00 GMThttps://sorabumi.jp/en/jwst-cosmic-web-filaments/https://sorabumi.jp/en/jwst-cosmic-web-filaments/Galaxies aren't scattered randomly through space. JWST's COSMOS-Web survey used 164,000 galaxies to chart the cosmic web in unprecedented detail — and the implications are remarkable. From SORABUMI.Sun, 17 May 2026 00:00:00 GMThttps://sorabumi.jp/en/supernova-dust-local-interstellar-cloud/https://sorabumi.jp/en/supernova-dust-local-interstellar-cloud/Researchers melted 300 kilograms of Antarctic ice core spanning 80,000 years and found iron-60 — a radioactive element that can only be born in a supernova explosion. It turns out the region of space the solar system is currently passing through is the remnant of a star that once exploded.Sat, 16 May 2026 00:00:00 GMThttps://sorabumi.jp/en/mars-glacier-water-resource/https://sorabumi.jp/en/mars-glacier-water-resource/Glaciers spread across Mars's mid-latitudes turned out to be more than 80% pure water ice, not rock. Here's what that means, and why it matters for crewed exploration.Fri, 15 May 2026 00:00:00 GMThttps://sorabumi.jp/en/tiny-world-holds-atmosphere/https://sorabumi.jp/en/tiny-world-holds-atmosphere/Astronomers have detected a thin atmosphere around 2002 XV93, a trans-Neptunian object just ~500 km across — smaller than Pluto. We break down why such a tiny body can hold onto gas at all, and how stellar occultation makes the detection possible.Thu, 14 May 2026 00:00:00 GMThttps://sorabumi.jp/en/apophis-2029-earth-flyby-deformed/https://sorabumi.jp/en/apophis-2029-earth-flyby-deformed/On April 13, 2029, asteroid Apophis will skim past Earth at just 32,000 km — closer than geostationary satellites. During this once-in-10,000-year flyby, Earth's gravity will physically reshape the rock in real time. ESA and JAXA's Ramses mission will be there to document it.Wed, 13 May 2026 00:00:00 GMThttps://sorabumi.jp/en/non-rotating-early-galaxy-jwst/https://sorabumi.jp/en/non-rotating-early-galaxy-jwst/A massive galaxy with barely any rotation has been discovered just 1.8 billion years after the Big Bang. JWST's observations are quietly dismantling the assumption that young galaxies always spin.Tue, 12 May 2026 00:00:00 GMThttps://sorabumi.jp/en/plato-exoplanet-mission-eyes/https://sorabumi.jp/en/plato-exoplanet-mission-eyes/ESA's exoplanet-hunting mission PLATO bundles 26 cameras to monitor up to 1 million stars. It aims to measure planetary radii to within 3% and even determine stellar ages. What sets it apart from previous telescopes, and what does it really mean to find an 'Earth-like planet'?Mon, 11 May 2026 00:00:00 GMThttps://sorabumi.jp/en/jwst-jades-early-galaxy-speed/https://sorabumi.jp/en/jwst-jades-early-galaxy-speed/Just 300 million years after the Big Bang, a galaxy rivaling the Milky Way in 'maturity' already existed. JADES-GS-z14-0, discovered by JWST, is challenging the foundations of cosmology.Sun, 10 May 2026 00:00:00 GMThttps://sorabumi.jp/en/icecube-neutrino-deep-ice-detector/https://sorabumi.jp/en/icecube-neutrino-deep-ice-detector/More than 650 new sensors have been added to IceCube, the massive detector buried in Antarctic ice. Here's the story of how humanity dares to 'catch' neutrinos — particles that pass through everything — and what secrets we're hoping to uncover.Sat, 09 May 2026 00:00:00 GMThttps://sorabumi.jp/en/dart-hera-asteroid-deflection/https://sorabumi.jp/en/dart-hera-asteroid-deflection/In 2022, NASA slammed a spacecraft into the asteroid Dimorphos and changed its orbit — the first time humanity had ever deflected a space rock. Now ESA's Hera mission is heading there to examine the aftermath. Here's how far planetary defense has come.Fri, 08 May 2026 00:00:00 GMThttps://sorabumi.jp/en/juno-jupiter-size-revised/https://sorabumi.jp/en/juno-jupiter-size-revised/NASA's Juno spacecraft has remeasured Jupiter's shape, overturning figures that planetary scientists had relied on since the 1970s. The equatorial radius is about 8 km shorter than previously thought, the polar radius about 24 km shorter. That 'small' difference is now rippling through exoplanet research.Thu, 07 May 2026 00:00:00 GMThttps://sorabumi.jp/en/tess-raven-ai-exoplanet-discovery/https://sorabumi.jp/en/tess-raven-ai-exoplanet-discovery/The AI pipeline RAVEN analyzed light curves from 2.2 million TESS-observed stars, confirming 118 new planets and revealing that roughly 10% of Sun-like stars host a close-in planet. Here's how it works and why it matters.Wed, 06 May 2026 00:00:00 GMThttps://sorabumi.jp/en/bepicolombo-mercury-orbit/https://sorabumi.jp/en/bepicolombo-mercury-orbit/BepiColombo, the joint ESA–JAXA mission launched in 2018, will finally enter Mercury's orbit in November 2026. Why does the journey take so long, and what makes Mercury such a puzzling world?Tue, 05 May 2026 00:00:00 GMThttps://sorabumi.jp/en/smile-magnetosphere-aurora-xray/https://sorabumi.jp/en/smile-magnetosphere-aurora-xray/SMILE, a spacecraft developed jointly by ESA and the Chinese Academy of Sciences, is set to launch on May 19, 2026. It will image — for the first time — the moment the solar wind slams into Earth's magnetosphere using X-rays, fundamentally reshaping our understanding of space weather.Tue, 05 May 2026 00:00:00 GMThttps://sorabumi.jp/en/galaxy-cluster-hidden-mass/https://sorabumi.jp/en/galaxy-cluster-hidden-mass/Galaxy clusters — the most massive objects in the universe — may contain roughly twice the baryonic mass astronomers have long assumed. The culprit is something no one bothered counting seriously: the accumulated remains of dead stars.Mon, 04 May 2026 00:00:00 GMThttps://sorabumi.jp/en/solar-corona-hole-space-weather/https://sorabumi.jp/en/solar-corona-hole-space-weather/Dark "holes" that appear on the Sun's surface from time to time — coronal holes — blast high-speed solar wind toward Earth, disrupting GPS, power grids, and satellite orbits. Here's how space weather works and why it matters.Mon, 04 May 2026 00:00:00 GMThttps://sorabumi.jp/en/uranus-two-outer-rings-mystery/https://sorabumi.jp/en/uranus-two-outer-rings-mystery/Observations from Keck Observatory, JWST, and Hubble reveal that Uranus's two outermost rings have entirely different compositions — one shines blue with water ice, the other is reddish-brown with rock and organics. Why would rings around the same planet be so different?Mon, 04 May 2026 00:00:00 GMThttps://sorabumi.jp/en/commercial-space-station-new-era/https://sorabumi.jp/en/commercial-space-station-new-era/The International Space Station is slated for retirement in the 2030s. What takes its place will be a new breed of orbital habitat — designed, built, and operated by private companies. Here's what the commercialization of low Earth orbit really means.Sun, 03 May 2026 00:00:00 GMThttps://sorabumi.jp/en/m-dwarf-stellar-flare-hazard/https://sorabumi.jp/en/m-dwarf-stellar-flare-hazard/M-type dwarf stars — red dwarfs — make up more than 70% of all stars in the galaxy. They're small, long-lived, and surrounded by rocky planets. So why are they so hostile to life? SORABUMI breaks down the battle between stellar flares and planetary atmospheres.Sun, 03 May 2026 00:00:00 GMThttps://sorabumi.jp/en/planet-formation-dust-to-worlds/https://sorabumi.jp/en/planet-formation-dust-to-worlds/How did Earth, Mars, and Jupiter come to exist? Starting from clouds of gas and dust, this explainer walks through the step-by-step process of planet formation — and what the explosion of exoplanet discoveries has taught us about just how many ways a planetary system can turn out.Sun, 03 May 2026 00:00:00 GMThttps://sorabumi.jp/en/rubin-observatory-time-domain-astronomy/https://sorabumi.jp/en/rubin-observatory-time-domain-astronomy/Starting in 2026, Rubin Observatory photographs the entire southern sky every 3–4 days and fires off around 100,000 change alerts each night. For the first time, astronomers have a systematic record of everything that flickers, explodes, or moves when no one is watching. Here's what that means for astronomy.Sun, 03 May 2026 00:00:00 GMThttps://sorabumi.jp/en/star-color-lifespan-explained/https://sorabumi.jp/en/star-color-lifespan-explained/When you look at a star's color, you're reading its temperature directly. Blue stars burn hot and die young; red stars simmer slowly for trillions of years. Here's how a star's color encodes its entire life story.Sun, 03 May 2026 00:00:00 GMThttps://sorabumi.jp/en/eta-aquariid-meteor-shower/https://sorabumi.jp/en/eta-aquariid-meteor-shower/Every May, Earth plows through a trail of debris left by Halley's Comet. Here's why the Eta Aquariid meteor shower puts on a bigger show in the Southern Hemisphere — and exactly what's happening when those streaks light up the predawn sky.Sat, 02 May 2026 00:00:00 GMThttps://sorabumi.jp/en/rogue-planet-wanderer-galaxy/https://sorabumi.jp/en/rogue-planet-wanderer-galaxy/What exactly is a rogue planet? This piece explores the strange class of worlds that belong to no star, drift freely through the Milky Way, and — as of January 2026 — can finally be measured for both mass and distance at the same time.Sat, 02 May 2026 00:00:00 GMThttps://sorabumi.jp/en/comet-naked-eye-meaning/https://sorabumi.jp/en/comet-naked-eye-meaning/In spring 2026, a comet returned to the inner solar system and became faintly visible to the naked eye. Its last visit was 180,000 years ago, and it won't come back. Why do comets captivate us the way they do? Here's a look at how to observe one, and what these ancient wanderers actually are.Fri, 01 May 2026 00:00:00 GMThttps://sorabumi.jp/en/ice-giants-superionic-interior/https://sorabumi.jp/en/ice-giants-superionic-interior/Uranus and Neptune are called 'ice giants,' but their interiors may host something stranger than ice: a superionic state where carbon stays locked in place while hydrogen alone flows in helical paths. This bizarre behavior could finally explain the planets' wildly tilted magnetic fields.Fri, 01 May 2026 00:00:00 GMThttps://sorabumi.jp/en/milky-way-halo-asymmetry-lmc/https://sorabumi.jp/en/milky-way-halo-asymmetry-lmc/The hot gas envelope surrounding the Milky Way is roughly 12% warmer on the southern side. The culprit is a neighboring satellite galaxy whose gravity has been compressing our galaxy's outer halo for the past 100 million years.Thu, 30 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/blackhole-jet-cygnus-x1-power/https://sorabumi.jp/en/blackhole-jet-cygnus-x1-power/Cygnus X-1 — humanity's first confirmed black hole — is firing a jet at half the speed of light. For the first time, astronomers have directly measured its power: the equivalent of 10,000 suns. Here's what 18 years of observations and a 'dancing jet' revealed.Wed, 29 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/international-space-cooperation-why/https://sorabumi.jp/en/international-space-cooperation-why/In March 2025, ESA and JAXA announced deeper cooperation on Moon and Mars exploration. But 48 countries don't converge on the Moon just for the sake of peace. Cost, technology, and politics are the real drivers — here's how they actually work.Wed, 29 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/sleeping-giant-blackhole-reborn/https://sorabumi.jp/en/sleeping-giant-blackhole-reborn/At the center of galaxy J1007+3540, a black hole that had been dormant for 100 million years suddenly fired up a new jet. Radio telescopes captured something rare: ancient fossil plasma and a fresh new outburst in the same frame. Why do black holes go quiet — and what makes them wake up?Tue, 28 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/exojupiter-water-ice-clouds/https://sorabumi.jp/en/exojupiter-water-ice-clouds/JWST's observations of Epsilon Indi Ab, a giant planet just 12 light-years away, turned up something no one expected: water-ice clouds instead of the ammonia clouds theory had promised. Here's what that means for atmospheric models.Mon, 27 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/gravitational-waves-new-astronomy/https://sorabumi.jp/en/gravitational-waves-new-astronomy/In 2015, humanity detected a ripple in spacetime for the first time. What are gravitational waves, how do we measure them, and what have we learned? A guide to the universe light couldn't show us.Mon, 27 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/mars-organic-molecules-curiosity/https://sorabumi.jp/en/mars-organic-molecules-curiosity/NASA's Curiosity rover detected 21 organic molecules in a Martian rock — 7 of them never seen on Mars before. This isn't evidence of life. But the rock preserved a chemistry friendly to life for 3.5 billion years.Mon, 27 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/solar-storm-mars-hazard/https://sorabumi.jp/en/solar-storm-mars-hazard/Multiple Mars spacecraft recorded the same solar storm simultaneously. Without a magnetosphere, Mars receives radiation doses many times higher than Earth. Here's why that's the biggest obstacle to sending humans there.Sun, 26 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/solar-system-xray-glow/https://sorabumi.jp/en/solar-system-xray-glow/Every time ions streaming from the Sun collide with hydrogen atoms in space, they produce X-rays. The eROSITA telescope has, for the first time, successfully separated the solar system's own glow from deep-space signals. Here's how it works and why it matters.Sat, 25 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/roman-space-telescope-wide-view/https://sorabumi.jp/en/roman-space-telescope-wide-view/Set to launch in 2026, NASA's Nancy Grace Roman Space Telescope has a field of view roughly 100 times wider than Hubble's — wide enough to capture five full moons in a single frame. From the mystery of dark energy to thousands of new exoplanets, Roman is poised to rewrite observational astronomy from the ground up.Fri, 24 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/steam-world-exoplanet-water/https://sorabumi.jp/en/steam-world-exoplanet-water/JWST has confirmed that more than 97% of GJ 9827d's atmosphere is water vapor. Neither a rocky planet nor a gas giant, this 'steam world' represents a genuinely new category in exoplanet science.Fri, 24 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/mars-ancient-ocean-coastline/https://sorabumi.jp/en/mars-ancient-ocean-coastline/A shelf-like landform in Mars's northern hemisphere may be the strongest evidence yet that a vast ocean once covered a third of the planet. Where did all that water go — and what does it mean for the search for life?Thu, 23 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/quasar-pair-galaxy-collision/https://sorabumi.jp/en/quasar-pair-galaxy-collision/Finding two quasars close together in the sky is a smoking gun for a massive galaxy merger. These discoveries let us look back to just 900 million years after the Big Bang — and they're rewriting how we understand the growth of galaxies.Wed, 22 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/steam-world-exoplanet-gj9827d/https://sorabumi.jp/en/steam-world-exoplanet-gj9827d/GJ 9827 d, a planet 97 light-years from Earth, has an atmosphere composed almost entirely of water vapor. Neither rocky, icy, nor gaseous, it represents a fourth planetary category — one that has now been observationally confirmed for the first time.Wed, 22 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/dark-matter-dark-energy-mystery/https://sorabumi.jp/en/dark-matter-dark-energy-mystery/Stars, galaxies, gas — everything we can observe makes up just 5% of the universe. The other 95% is something we can't see. Dark matter and dark energy sit at the heart of modern cosmology, and we still don't know what either of them is.Tue, 21 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/sun-life-stages-red-giant/https://sorabumi.jp/en/sun-life-stages-red-giant/The Sun rises every morning without fail, but it's just another star — and like every star, it has a lifespan. In about 5 billion years, it will swell into a red giant and almost certainly consume Earth. Here's the full story of the Sun's life.Tue, 21 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/comet-two-tails-secret/https://sorabumi.jp/en/comet-two-tails-secret/That long glowing streak crossing the night sky isn't just one tail — it's two. A white, curving dust tail and a blue, razor-straight ion tail, shaped by completely different forces. Here's what's actually going on.Mon, 20 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/lunar-gateway-why-needed/https://sorabumi.jp/en/lunar-gateway-why-needed/Tucked into an orbit that is neither the lunar surface nor Earth's backyard, Gateway is one of the stranger ideas in the Artemis program. Why build a small station out there at all? Here's a plain-language look at the NRHO, how Gateway differs from the ISS, and why it matters for reaching Mars.Sun, 19 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/lagrange-point-parking-lot/https://sorabumi.jp/en/lagrange-point-parking-lot/JWST, SOHO, Euclid — they all live at something called a Lagrange point, a gravitationally sweet spot 1.5 million km from Earth. Why send expensive telescopes all the way out there? Here's how the solar system's cosmic parking lots actually work.Sat, 18 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/starship-reusable-rocket-revolution/https://sorabumi.jp/en/starship-reusable-rocket-revolution/SpaceX's Starship launches, returns nearly intact, and flies again. What makes this so hard, and why does it matter so much? With the second-generation Block 3 vehicle now approaching its debut, here's a clear-eyed look at the engineering and the stakes.Sat, 18 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/space-debris-kessler-syndrome/https://sorabumi.jp/en/space-debris-kessler-syndrome/Nearly 30,000 tracked objects now circle Earth. When broken satellites and rocket stages collide, fragments breed more fragments in a chain reaction that could make entire orbital bands permanently unusable. Here's what Kessler syndrome actually means — and which altitudes are already in danger.Fri, 17 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/mmx-phobos-sample-return/https://sorabumi.jp/en/mmx-phobos-sample-return/Launching in autumn 2026, JAXA's MMX will be humanity's first mission to retrieve samples from a Martian moon. Why target a moon instead of Mars itself, and what can 10 grams of sand actually tell us? We dig into the century-old debate between the capture hypothesis and the giant-impact hypothesis.Thu, 16 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/habitable-zone-meaning/https://sorabumi.jp/en/habitable-zone-meaning/The 'habitable zone' gets thrown around a lot in exoplanet news. But it's never just about distance. Atmosphere, magnetic fields, rotation, and hidden subsurface oceans beyond the zone entirely — here's what conditions for life actually look like, explained with diagrams.Wed, 15 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/jupiter-saturn-moon-mystery/https://sorabumi.jp/en/jupiter-saturn-moon-mystery/Jupiter boasts four Galilean moons while Saturn's only large moon is Titan. A study published in April 2026 traced that striking difference to the planets' magnetic fields — an invisible barrier that determined which moons lived and which ones fell.Tue, 14 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/hubble-tension-expansion-mystery/https://sorabumi.jp/en/hubble-tension-expansion-mystery/Two different methods for measuring how fast the universe is expanding keep giving different answers. A landmark April 2026 measurement has now ruled out measurement error as the explanation — and what's left is genuinely unsettling.Mon, 13 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/saturn-rings-disappearing/https://sorabumi.jp/en/saturn-rings-disappearing/Saturn's rings are arguably the most iconic sight in the solar system — and they're slowly falling onto the planet itself. NASA observations have revealed the phenomenon known as 'ring rain,' and the rings may be gone within 100 million years.Sat, 11 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/hydrogen-halo-cosmic-noon/https://sorabumi.jp/en/hydrogen-halo-cosmic-noon/Ten billion years ago, galaxies were churning out stars at a furious pace. Where did all that fuel come from? HETDEX has found 33,000 hydrogen halos, and they're beginning to answer one of astronomy's oldest questions.Fri, 10 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/moon-survival-guide/https://sorabumi.jp/en/moon-survival-guide/As the Artemis program pushes forward, long-term stays on the lunar surface are becoming a real possibility. Radiation, vacuum, and wild temperature swings — here's what the science says about keeping humans alive in one of the most hostile environments imaginable.Thu, 09 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/artemis-ii-lunar-flyby/https://sorabumi.jp/en/artemis-ii-lunar-flyby/For the first time in half a century, people flew to the vicinity of the Moon. Robots could have taken the same photos. So why send a crew? Artemis II's 10-day mission and its 7-hour lunar observation window force that question into sharp focus.Wed, 08 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/early-galaxy-structure-mystery/https://sorabumi.jp/en/early-galaxy-structure-mystery/A spiral galaxy nearly identical to the Milky Way was found just 1.5 billion years after the Big Bang. Here's what JWST's stunning discovery means for galaxy formation — and why the old theories are struggling to keep up.Wed, 08 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/rocky-exoplanet-atmosphere/https://sorabumi.jp/en/rocky-exoplanet-atmosphere/JWST detected a thick atmosphere on TOI-561 b, a scorching rocky planet orbiting its star in just 11 hours. Here's why an atmosphere can survive in that environment — and why the discovery changes everything about how we study exoplanets.Wed, 08 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/moon-farside-mystery/https://sorabumi.jp/en/moon-farside-mystery/The near side of the Moon is draped in dark volcanic plains, while the far side is a battered mess of craters. That stark asymmetry traces directly back to the Moon's violent birth. Here's what Artemis II astronauts saw when they became the first humans in over 50 years to lay eyes on it.Tue, 07 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/neutron-star-meets-blackhole/https://sorabumi.jp/en/neutron-star-meets-blackhole/Two of the universe's most extreme objects collide — and the last few milliseconds of that encounter trace all the way back to the origin of gold and platinum. Gravitational waves have finally let us witness this cosmic clash up close.Tue, 07 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/planet-composition-revealed/https://sorabumi.jp/en/planet-composition-revealed/The James Webb Space Telescope and the Hubble Space Telescope observed Saturn at nearly the same time. What infrared and visible light each uncovered tells us something profound about how planets are built.Mon, 06 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/20260401-galaxy-cluster-jellyfish/https://sorabumi.jp/en/20260401-galaxy-cluster-jellyfish/When a galaxy plunges into a cluster, superheated gas blasts it into something that looks eerily like a jellyfish. Here's how ram pressure stripping works — and what JWST found 8.5 billion years back.Wed, 01 Apr 2026 00:00:00 GMThttps://sorabumi.jp/en/20260331-earth-like-planets-really/https://sorabumi.jp/en/20260331-earth-like-planets-really/With more than 6,000 confirmed exoplanets, have we found a second Earth? We break down what the habitable zone actually means, how similarity is measured, and how the Nancy Grace Roman Space Telescope is about to change the search.Tue, 31 Mar 2026 00:00:00 GMThttps://sorabumi.jp/en/20260330-hayabusa2-torifune-naming/https://sorabumi.jp/en/20260330-hayabusa2-torifune-naming/Using the naming of asteroid 'Torifune' as a starting point, we dig into what it means to give a name to a rock in space — IAU naming rules, the intersection of Japanese mythology and outer space, and the planetary defense mission driving Hayabusa2 forward.Mon, 30 Mar 2026 00:00:00 GMThttps://sorabumi.jp/en/20260329-interstellar-comet-3i-atlas/https://sorabumi.jp/en/20260329-interstellar-comet-3i-atlas/Discovered in 2025, 3I/ATLAS is only the third interstellar object ever detected. How do we know it came from outside the solar system? What makes it different from ʻOumuamua and 2I/Borisov? And why did ESA and NASA scramble to observe it so quickly? Here's what the data is telling us — and what it might unlock about planet formation across the galaxy.Sun, 29 Mar 2026 00:00:00 GMThttps://sorabumi.jp/en/20260329-organic-molecules-in-universe/https://sorabumi.jp/en/20260329-organic-molecules-in-universe/Benzene has been found in space. Amino acids and nucleobases hitchhike on comets. Organic molecules are everywhere. So why does life seem to exist only on Earth? JWST's latest observations are forcing us to rethink the enormous gap between raw ingredients and living things.Sun, 29 Mar 2026 00:00:00 GMThttps://sorabumi.jp/en/blackhole-photon-sphere/https://sorabumi.jp/en/blackhole-photon-sphere/Black holes trap even light—so how can we see a glowing ring around them? This explainer walks through the photon sphere, the EHT image of M87, and the gravitational lensing that turns the cosmos's darkest objects into its most spectacular portraits.Fri, 20 Mar 2026 00:00:00 GMT