Exploding Stars, Black Holes, and the Forbidden Gap

By Evan Gough - April 22, 2026 10:32 PM UTC | Black Holes
An international team led by Monash University has uncovered evidence of a rare form of exploding star, helping to shed light on one of the most cataclysmic events in the universe. At the end of their lives, most massive stars collapse into black holes—objects with gravity so strong that not even light can escape. But some are completely destroyed in pair-instability supernova explosions. This can explain the so-named "Forbidden Gap" in black hole masses.
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Mars Didn't Have Bathtubs, It Had Shelves

By Andy Tomaswick - April 22, 2026 10:37 AM UTC | Planetary Science
Scientists have been debating for decades whether Mars once held a vast ocean covering a large part of its northern face. To prove the idea, they’ve been looking for a “bathtub ring” - a distinct, level shoreline that shows where water once stood. But, despite years of looking, they’ve only been able to find a very distorted potential shoreline whose height deviates by several kilometers - not exactly great evidence of a stable water level. But, according to a new paper in Nature from Abdallah Zaki and Michael Lamb of CalTech, what scientists should have been looking for wasn’t a bathtub ring, but a continental shelf.
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Stellar Flares May Expand Habitable Zones Around Small Stars

By Laurence Tognetti, MSc - April 22, 2026 03:39 AM UTC | Exoplanets
The search for life beyond Earth has traditionally focused on exoplanets orbiting Sun-like stars, which is a G-type star. However, low-mass stars, which are designated as K-type and M-type stars, have rapidly become a target for astrobiology, primarily due to their much longer lifetimes. This also means the habitable zone (HZ), which is the distance from a star where liquid water could exist, is much smaller than our solar system’s HZ, and is referred to as the liquid water habitable zone (LW-HZ). In contrast, another type of HZ that involves a star’s ultraviolet (UV) radiation potentially enabling life-harboring conditions is known as UV-HZ.
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Scientists Connect Sub-extreme Solar Outbursts to Tree Rings via Poetry

By Carolyn Collins Petersen - April 21, 2026 08:34 PM UTC | Planetary Science
As we make our way through the latest solar maximum period, scholars and scientists are looking to similar events in the past to learn more about ancient bouts of solar activity. In particular, they want to know more about solar proton events (SPEs). These outbursts of high-energy particles get triggered by flares and coronal mass ejections.
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Which Types of Civilizations Collapse and Which Can Endure?

By Evan Gough - April 21, 2026 03:49 PM UTC | Uncategorized
New research examines 10 different types of global technological civilizations, how they govern themselves, how they use resources, and other factors, to determine which types may endure and which may be doomed to collapse. Simulations show that resource use plays the key role. The simulations also show which types of detectable technosignatures each may generate.
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Behold, the Solar System in All its X-ray Glory

By Matthew Williams - April 21, 2026 12:07 AM UTC | Solar Astronomy
Using the eROSITA space telescope, MPE researchers have successfully isolated the X-ray glow from our Solar System, revealing its impact on the soft X-ray sky. The findings, published in Science, underscore the importance of considering Solar System processes when analyzing X-ray data and highlight eROSITA’s role in advancing not only astrophysics but also heliophysics.
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Exoplanets Without Lots of Water Can't Maintain Their Carbon Cycles

By Evan Gough - April 20, 2026 06:25 PM UTC | Exoplanets
Water is critical to life because cells need liquid to function. That's why scientists focus on finding and studying exoplanets in habitable zones. But even if they're in habitable zones, exoplanets need lots of water to support their carbon cycles. So without water, exoplanets become inhospitable greenhouse planets, regardless if they're in habitable zones or not.
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NASA’s SPHEREx Telescope Just Mapped the Cosmic Ices That Will Someday Build Planets

By Andy Tomaswick - April 20, 2026 02:59 PM UTC | Milky Way
New missions mean new capabilities - and one particularly interesting new mission is finally up and running. Data is starting to come in from SPHEREx, the medium-class surveyor that is mapping the entire sky every six months. A paper based on some of that early data was recently published in The Astrophysical Journal, mapping ice and compounds called Polycyclic Aromatic Hydrocarbons (PAHs) throughout some interesting regions of our Milky Way.
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How a Black Hole and a Shredded Star Could Light Up a Galaxy

By Carolyn Collins Petersen - April 17, 2026 09:03 PM UTC | Black Holes
In 2014, a strange cloudy object called G2 made a close approach to Sagittarius A*, (Sag A*) the supermassive black hole at the heart of the Milky Way Galaxy. Astronomers were pretty excited, partly because they thought it might get torn apart by Sag A*'s intense gravitational pull. That didn't happen, and the event was a cosmic fizzle. Instead, G2 skipped around the black hole. Various observations showed that it wasn't just a gas cloud. It was likely a dusty protostellar object encased in a dusty cloud. Or perhaps several merged stars. But, it survived the flyby and continued on a shortened orbit.
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Small Trojan Asteroids Defy Expectations

By Andy Tomaswick - April 17, 2026 06:47 PM UTC | Planetary Science
Understanding the beginning of the solar system requires us to look at some very strange places. One such place is at the so-called “Trojan” asteroids that share Jupiter’s orbit in front of and behind it. But for a long time, these cosmic time capsules have held a mystery for astronomers: why are they color-coded? The populations of larger asteroids are very clear split into two distinct groups - the “reds” and the “less reds”, because apparently they’re all red to some extent. A new paper from researchers in Japan tried to solve this mystery by taking a close look at even smaller asteroids, and their findings, published in a recent edition of The Astronomical Journal, actually brings up a completely different question - why don’t smaller Trojan asteroids have the same color-coding?
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Life Beyond Biosignatures: A New Method In The Search For Life

By Evan Gough - April 17, 2026 05:37 PM UTC | Astrobiology
Researchers from the Earth-Life Science Institute (ELSI) and National Institute for Basic Biology have developed a new method to detect extraterrestrial life without relying on traditional biosignatures. By modelling how life might spread between planets, they demonstrate that life could be detected through statistical patterns across planetary populations rather than on individual planets. This "agnostic biosignature" approach could assist in guiding future searches for life beyond Earth.
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Comet R3 PanSTARRS at Perihelion

By David Dickinson - April 17, 2026 03:10 PM UTC | Observing
We’re one comet down, and one to go for spring season 2026. We recently wrote about prospects for sungrazer C/2026 A1 MAPS and comet C/2025 R3 Pan-STARRS in April 2026. While the bad news is, Comet A1 MAPS disintegrated like so many sungrazers before it during its blistering close perihelion passage on April 4th, comet R3 Pan-STARRS put on an amazing dawn showing for early rising astrophotographers.
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To Survive Deep Space, Astronauts May Owe a Debt to Microscopic Worms

By Andy Tomaswick - April 17, 2026 11:57 AM UTC | Missions
Living long-term on the Moon means surviving the devastating toll that deep space takes on a human body. Astronauts in low gravity environments suffer muscle and bone loss, vision-altering fluid shifts, and heavy radiation exposure - all of which are incredibly hazardous to our biology. So, to help future lunar explorers survive, a new crew just arrived at the International Space Station (ISS). That might not sound surprising, except this crew is composed of worms.
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Watch This Dark Volcanic Ash Creep Across the Red Planet

By Andy Tomaswick - April 17, 2026 10:55 AM UTC | Planetary Science
Mars is well known as a static, frozen desert. We tend to think of the only thing changing on the surface of the Red Planet is due to the occasional dust storm. But if you look closely - and are willing to wait decades - you’ll see the planet is very much alive - at least in the environmental sense. The European Space Agency just released some spectacular new images from the High Resolution Stereo Camera (HRSC) on its Mars Express Orbiter, one of which shows a surprisingly “fast” geological change happening in Utopia Planitia. A dark, ominous-looking blanket of volcanic ash is actively creeping across the bright red sands - and it's moving (relatively) fast.
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The Moon Might Be More Prone To Fires

By Andy Tomaswick - April 16, 2026 04:41 PM UTC | Space Exploration
Engineers love a good practical challenge, especially when it comes to spaceflight. But there’s one particular challenge facing the crewed missions of the near future that scares mission planners above almost all others - fire. For decades, we’ve relied on a NASA test known as NASA-STD-6001B to screen material flammability for flight. But space is much more complicated than an Earth-bound test provides for. A new paper from researchers at NASA’s Glenn Research Center and Johnson Space Center and Case Western Reserve University details a planned mission to test the flammability of materials on the Moon’s surface - where they expect flame to act much differently than it does here on Earth.
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Why NASA’s Cheapest Missions Produce the Least Science

By Andy Tomaswick - April 16, 2026 02:12 PM UTC | Space Policy
To say NASA has been undergoing some massive administrative changes lately is a huge understatement. One of the more concerning ones, according to a new paper at the 57th Lunar and Planetary Science Conference by Ari Koeppel and Casey Dreier of the Planetary Society, is the trend towards the Silicon Valley mindset of “move fast and break things” - which they argue doesn’t work very well when it comes to producing valuable science.
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JWST Sees Smoking Gun for Black Hole Mergers in the Virgo Cluster

By Carolyn Collins Petersen - April 15, 2026 09:43 PM UTC | Extragalactic
A pair of dwarf galaxies in the giant Virgo Cluster show what can happen when these stellar cities interact. Scientists at the University of Michigan focused the James Webb Space Telescope (JWST) onto the galaxies NGC 4486B and UCD736 and found each of them sporting "overmassive" black holes at or near their hearts. Those supermassive black holes comprise a large fraction of each galaxy's mass.
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Catching the 2026 April Lyrid Meteor Shower

By David Dickinson - April 15, 2026 01:53 PM UTC | Observing
April flowers mean one thing to springtime sky-watchers: it’s time for the Lyrid meteor shower. The Lyrids are always a good bet, and always make the top ten list for annual meteor showers. And to top it off, 2026 is a favorable year for the Lyrids, with the waxing crescent Moon mostly out of the way.
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Stardust in the Clouds of Venus.

By Mark Thompson - April 15, 2026 11:33 AM UTC | Planetary Science
Venus has been hiding a secret for fifty years. Just below its main cloud deck sits a mysterious layer of haze that spacecraft first detected in the 1970s and nobody could explain where it came from. Now a research team in Japan has finally cracked it, and the answer comes from the last place most people would think to look!
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Magnetism Frozen in Time.

By Mark Thompson - April 15, 2026 09:54 AM UTC
Every star you've ever looked at is hiding a magnetic secret and it may have been hiding it since birth. A new theoretical study has connected, for the first time, the magnetic fields detected deep inside dying red giants with the magnetism found at the surfaces of their long dead remnants. These fields may be ancient fossils, born early in a star's life and surviving billions of years of violent transformation completely intact.
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The Sharpest Eyes on the Sun.

By Mark Thompson - April 15, 2026 09:43 AM UTC | Solar Astronomy
The Sun is the most studied star in the universe, yet some of its most violent behaviour remains stubbornly out of reach. Solar flares, explosive eruptions that can disrupt satellites, knock out power grids and bathe astronauts in radiation release enormous bursts of X-rays that carry vital clues about what drives them. Now, a team of Japanese engineers has built the sharpest X-ray telescope ever to fly on a solar mission, and the technology it has pioneered could soon fit inside a satellite the size of a shoebox.
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A New Eye Opens at the Top of the World.

By Mark Thompson - April 15, 2026 09:37 AM UTC | Observing
Thirty four years ago, a group of Cornell scientists looked at a remote Chilean mountaintop and imagined what might be built there one day. That day has arrived. The Fred Young Submillimeter Telescope has just opened its eyes on the universe from one of the most extreme observatory sites ever chosen, and the science it promises to deliver from the first moments after the Big Bang to the hidden nurseries of newborn stars.
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Are Neutrinos Their Own Evil Twins? Part 4: Majorana's Mystery

By Paul Sutter - April 15, 2026 02:06 AM UTC | Physics
In 1937, Ettore Majorana asked a question nobody else was even thinking about: does a particle have to have a distinct antiparticle? For neutrinos — which carry no charge — the answer might be no. They might be their own antiparticles. Deep underground right now, experiments are watching atoms decay, waiting for the signal that would prove it. So far: nothing. But the case is not closed.
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The Incredible Shrinking Neutrino.

By Mark Thompson - April 14, 2026 08:48 PM UTC | Physics
They are the most abundant particles in the universe, yet we barely know they exist. Neutrinos stream through everything, through walls, through planets and even through you…. in their billions every second, leaving no trace. We've known for decades that they have mass, but pinning down exactly how much has defeated physicists for years. Now, the most sensitive experiment ever built has pushed our knowledge to a new frontier, and what it found raises a profound question about why these ghostly particles are so extraordinarily light.
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Reading the Moon’s Buried Past.

By Mark Thompson - April 14, 2026 08:46 PM UTC | Planetary Science
The lunar south pole is where humanity plans to build its first permanent outpost but we still don't fully understand what lies beneath the surface. A new study has used radar to peer below the ground in one of the Moon's most complex and battered regions and what it's finding raises important questions about the geological minefield that future astronauts will be navigating. Ancient impacts, frozen melt sheets, and billions of years of overlapping debris may complicate our plans more than we thought.
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The Universe’s Most Powerful Telescope.

By Mark Thompson - April 14, 2026 08:34 PM UTC | Cosmology
When a massive star explodes on the far side of the universe, the light from that explosion normally fades long before it reaches us. But occasionally, the universe conspires to help. A newly discovered supernova has been caught using the gravity of an entire galaxy as a natural magnifying glass, boosting its light by at least a hundred times and revealing a stellar death that would otherwise have been completely invisible. It is the most magnified supernova ever found, and it opens a remarkable new window onto the distant universe.
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The Zhamanshin Impact Event Was Likely Much More Destructive Than Thought

By Evan Gough - April 14, 2026 07:04 PM UTC | Planetary Science
Around 900,000 years ago, an impactor slammed into modern-day Kazakhstan and excavated a crater about 14 km in diameter. It was the most recent hypervelocity impactor powerful enough to trigger a nuclear winter, but not an exinction. New research suggests the crater is almost twice as large, showing that the energy released by the impact was much greater than thought.
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Are Neutrinos Their Own Evil Twins? Part 3: Dirac's Direct Solution

By Paul Sutter - April 14, 2026 02:06 AM UTC | Physics
Neutrinos have mass — yet they never flip between left- and right-handed states the way every other massive particle does. The most logical fix is Paul Dirac's: invisible right-handed neutrinos that interact with nothing whatsoever. The math works. It even produces a beautiful explanation for why neutrino masses are so absurdly tiny. But it requires believing in particles that are permanently, in-principle undetectable.
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Exoplanet Host Star Shares Elemental Traits with Its Hot Jupiter

By Carolyn Collins Petersen - April 14, 2026 01:32 AM UTC | Planetary Science
An ultra-hot Jupiter exoplanet orbiting a nearby star gave scientists using the Gemini South telescope a look at how both a star and its hot planet can have similar chemical compositions. The team, led by Arizona State University graduate student Jorge Antonio Sanchez, took spectra of the planet, called WASP-189b, using the Immersion Grating Infrared Spectrograph instrument. The observations measured the abundance of magnesium compared to silicon in the hot planet's atmosphere and allowed the team to compare it to the makeup of its parent star.
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Saturn's Magnetic Shield Is Not Where Anyone Expected It To Be.

By Mark Thompson - April 13, 2026 10:51 PM UTC | Planetary Science
Saturn is one of the most recognisable and studied planets in the Solar System, it was the first thing I ever saw through a telescope and yet it is still finding ways to surprise us. New research analysing data from NASA's Cassini spacecraft has revealed a significant and unexpected quirk in Saturn's protective magnetic bubble, one that confirms the giant planets of our Solar System play by completely different rules to Earth.
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The Most Quiet Place We've Ever Listened From!

By Mark Thompson - April 13, 2026 10:32 PM UTC | Planetary Science
For the first time in history, scientists have used a spacecraft on the far side of the Moon to search for signals from extraterrestrial intelligence. China's Chang'E-4 lander sat in the most radio quiet location humanity has ever placed an instrument, shielded from Earth's constant electronic chatter by the entire bulk of the Moon itself. They found nothing but that is almost beside the point!
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Are Neutrinos Their Own Evil Twins? Part 2: The Weak Left-Hander

By Paul Sutter - April 13, 2026 02:06 AM UTC | Physics
The weak nuclear force is the eccentric cousin of the four forces — the one that only shakes hands with left-handed particles. That bizarre preference turns out to be absolutely critical for stars, nuclear fusion, and the existence of most matter. And neutrinos love it. There's just one problem: neutrinos appear to only exist in one handedness, which makes no sense at all.
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The Chip That Could Survive Venus

By Mark Thompson - April 12, 2026 08:14 PM UTC | Space Exploration
Every piece of electronics ever sent to Venus has been destroyed within hours of landing, cooked alive by surface temperatures hot enough to melt lead. Now a team of engineers at the University of Southern California has built a memory chip that laughs in the face of that heat, surviving temperatures hotter than molten lava and it started with a happy accident!
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The Craters that Made Us

By Mark Thompson - April 12, 2026 07:33 PM UTC | Astrobiology
What if the same collisions we think of as forces of destruction were actually the spark that created life on Earth? New research published in the Journal of Marine Science and Engineering is making a compelling case that meteor impacts didn't just reshape our planet's surface, instead that they may have built the very cradles where life first emerged.
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