The early Universe was a busy place some 13 billion years ago. That's when countless young galaxies began to evolve and birthed stars at a prodigious rate. The hearts of those very distant galaxies show turbulent, lumpy disks studded with even thicker clumps of dust and gas that spawned huge batches of stars. Astronomers want to understand what's driving the clumping, so they've turned to recent surveys of closer galaxies in the "local Universe" that contain similar lumpy regions.

More than one third of the regular matter in the Universe is missing (we're not talking about dark matter, just regular matter). It's needed to make the current cosmological models work, so astronomers continue to search for it, and have found many indirect examples of it. Now a team of astronomers has directly observed it as a huge filament of hot gas bridging four galaxy clusters and containing 10 times the mass of the Milky Way.

Solar eclipses are beautiful, but they're a valuable chance to study the Sun's atmosphere as its surface is blocked by the Moon. Now, ESA can generate artificial solar eclipses from space with the Proba-3 mission. The two satellites fly in formation 150 meters apart. One spacecraft occults the Sun, while the other observes the faint solar corona. They can produce a new 6-hour eclipse every 19.6-hour orbit around the Earth. Solar eclipses on demand.

Comet C/2014 UN271 is one of the largest Oort Cloud comets ever observed, measuring 140 km across. It's currently at a distance of 16.5 AU from the Sun, which makes it tough to observe with all but the largest telescopes. Astronomers have used ALMA in Chile to observe the comet, watching as jets of carbon monoxide gas are erupting from its nucleus. This is a surprising level of activity for a comet that's so far from the Sun.

Scientists are using a new approach to find the mysterious - if it exists - Planet Nine by hunting for its heat signature instead of reflected light. Using data from Japan's AKARI space telescope, a team of researchers identified two promising candidates using their thermal detection method which is more effective than optical searches alone. But could these distant heat sources finally prove the existence of our Solar System's most elusive world, or will they turn out to be yet another false alarm in the decades long search?

Stephen Hawking has made a compelling case that black holes eventually evaporate, but the time scales are beyond our ability to detect it. A new paper suggests that primordial black holes passing through the Solar System could be releasing positron emissions that would be detectable when they pass up to 10 AU from Earth. If found, they would confirm Hawking's theories and provide an explanation for dark matter. Unfortunately, our best technology isn't quite sensitive enough.

The Chinese Space Agency took a major step toward its 2030 lunar mission goals this week by successfully testing the escape system of its next-generation Mengzhou spacecraft. At the Jiuquan Satellite Launch Center, engineers conducted their first zero-altitude escape flight test at 12:30 PM when solid rocket engines ignited, propelling the spacecraft skyward for 20 seconds before the return capsule separated, deployed parachutes, and landed safely.

You're probably aware that most of the matter of the Universe is "dark matter," and astronomers still don't know what it is. But 75% of the regular matter in the Universe is also hidden, located in the thin gas between galaxies. Probing this gas is difficult, but astronomers have used a new technique, analyzing the light from fast radio bursts as they pass through billions of light-years of gas. Longer, redder wavelengths are slowed down compared to shorter, bluer wavelengths, allowing the hidden material to be weighed.

As different nations begin conducing operations on the lunar surface, humanity's penchant for geopolitical struggles will likely be along for the ride. Tension between nations and/or corporations could grow. There are few rules and treaties that can calm this potential rising tension. What kinds of conflict might erupt and how can it be prevented?

Star formation peaked during the Cosmic Noon, which spanned from 10 to 12 billion years ago. During Cosmic Noon, star formation was 10 to 100 times greater than it is now. New research shows that a particular class of galaxy was experiencing its first intense burst of star formation during this time. Were these galaxies the progenitors of galaxies like the Milky Way?

Modern telescopes like the Zwicky Transient Facility (ZTF) are watching the sky for any changes, and can report a million variations in a single night. This will multiply when Vera Rubin comes online. SETI researchers are looking for specific events that could be caused by an intelligent civilization, and have developed methods to search through astronomical alerts automatically. This could give SETI researchers dozens of potential targets a night to follow up on, scanning for signals or anomalous changes in brightness.

Great, another potential long-term risk of spaceflight. Researchers have studied the effects of simulated microgravity on mice and found that it could lead to periodontitis, where the gums become inflamed and the bones supporting teeth start to break down. This was compared to mice who experienced normal gravity. This could be limited to just the teeth or a larger indicator of inflammation in the body caused by weightlessness, which could have other health impacts.

Black holes can accumulate planets and stars' worth of material, but even they have their limits. Astronomers have discovered a supermassive black hole which has reached that limit. Excess material is now being ejected from the vicinity around the black hole at nearly a third the speed of light. Astronomers found that about 10 Earth masses of material were added to the black hole's vicinity in 5 weeks, creating a ring of matter and feeding the outflow jets.

The Vera C. Rubin is a game changing observatory that we've been keeping our eyes on. When it goes online, it'll begin a 10 year survey of the southern sky, capturing the entire sky every few nights, eventually building up a history of 800 images of each spot. It'll generate 20 terabytes of data every day, collecting 60 petabytes of raw image data. And it's almost ready to begin operations. On June 23 at 15:00 UTC, operators are going to release the first images from the telescope live to the internet, and you'll be able to watch.

When the Apollo astronauts returned to Earth, they complained that the gritty lunar dust got into everything, including their lungs. There have been decades of research into its toxicity, and a recent study has shown that it might actually be less hazardous than regular Earth-based air pollution. Sure, it can cause irritation to lung tissue, but not that kind of severe cellular damage or inflammation seen from urban Earth dust. It doesn't seem to cause long-term diseases like silicosis.

Hycean worlds are planets covered in oceans that also have thick hydrogen atmospheres. There are no confirmed Hycean worlds—also called ocean worlds—but many candidates. Even though they're only candidates so far, researchers are curious about their habitability. New research examines the role tidal heating plays in their potential habitability.

We might not currently have any technology that would make a space elevator viable on Earth. But that doesn’t mean they wouldn’t work on other bodies around the solar system. One of the most interesting places that one could work is around Ceres, the Queen of the Asteroid Belt, and potentially one of the biggest sources of resources for humanity’s expansion into space. A new paper from researchers at the University of Colorado, Colorado Springs and Industrial CNT, a manufacturer of Carbon Nanotube (one potential material for the space elevator), details just how useful such an elevator could be.

More and more satellites are being added to Low Earth Orbit (LEO) every month. As that number continues to increase, so do the risks of that critical area surrounding the Earth becoming impassable, trapping us on the planet for the foreseeable future. Ideas from different labs have presented potential solutions to this problem, but one of the most promising, electrodynamic tethers (EDTs), have only now begun to be tested in space. A new CubeSat called the Spacecraft for Advanced Research and Cooperative Studies (SPARCS) mission from researchers at the Sharif University of Technology in Tehran hopes to contribute to that effort by testing an EDT and intersatellite communication system as well as collecting real-time data on the radiation environment of its orbital path.

A recent study looked at the challenges New Space may face, in terms of impact on the ozone layer. The study was published recently in the journal of Nature (link) by researchers out of University of Canterbury in Christchurch, New Zealand, Harvard University, and the Institute for Atmospheric Climate Science and the Physics-Meteorology Observatory in Switzerland.

With over 5,000 exoplanets now identified, astronomers have found that our Solar System isn't the only model of planetary formation. There are super-Earths, sub-Neptunes, hot-Jupiters, and Earth-sized worlds orbiting around red dwarf stars. In a new paper, researchers propose how the search for life could adapt to these bizarre environments, expanding the definition of a habitable world. Life could exist without a surface, or using different kinds of solvents than water.

The early Solar System was filled with both hydrogen and oxygen that can chemically bond into water. But did we create all the water, or was some of it inherited from the earlier times, already present in the protostellar nebula? Astronomers have used the James Webb Space Telescope to study a newly-forming protoplanetary system called L1527 IRS, which will eventually become a star like our Sun. They found evidence that water from interstellar space is preserved when it becomes part of a new star system.

If our Solar System seems stable, it's because our short lifespans make it seem that way. Earth revolves, night follows day, the Moon moves through light and shadow, and the Sun hangs in the sky. But in reality, everything is moving and influencing everything else, and the fine balance we observe can easily be disrupted. Could passing stars have disrupted Earth's orbit and ushered in dramatic climatic changes in our planet's past?

In 1912, astronomer Victor Hess discovered strange, high-energy particles called "cosmic rays." Since then, researchers have hunted for their birthplaces. Today, we know about some of the cosmic ray "launch pads", ranging from the Sun and supernova explosions to black holes and distant active galactic nuclei. What astronomers are now searching are sources of cosmic rays within the Milky Way Galaxy. One such source is a pulsar wind nebula sending high-energy particles out to space.

Shortly after astronomers detected asteroid 2024 YR4 on December 27th, 2024, they realized it posed no threat to Earth. But it still might impact the Moon in 2032. The impact debris could threaten satellites and trigger an extraordinarily stunning meteor shower.

Very massive stars (VMSs), which typically has masses about 100 times that of our own Sun, are critical components in our understanding of the formation of important astronomical structures like black holes and supernovae. However, there are some observed characteristics of VMSs that don’t fit the expected behavior based on the best models we have of them. In particular, they hover around a relatively limited band of temperatures, which are hard to replicate with typical stellar evolution models. A new paper from Kendall Shepherd and their co-authors at the Institute for Advanced Study (SISSA) in Italy describes a series of new models based on updated solar winds that better fit the observations of VMSs in their natural environment, and might aid in our understanding of the development of some of the most fascinating objects in the Universe.

LUNAA Journeys (St. LUcia National Astronomy Association) is looking to address an all too common problem in the global astronomical community. Too often, participation in astronomy is seen as cost prohibitive, the sole pursuit of large universities or organizations that can afford to build a large modern observatory, or launch the Hubble Space Telescope. This is unfortunate, as there’s never been an era of more readily accessible information, out there in terms of astronomy and skywatching.

During its commissioning phase, NASA's [*Polarimeter to Unify the Corona and Heliosphere*](https://science.nasa.gov/blogs/punch/) (PUNCH) mission captured high-resolution images of a [Coronal Mass Ejection](https://www.swpc.noaa.gov/phenomena/coronal-mass-ejections) (CME) in greater detail than was previously possible.

Solar sails are space's ultimate free ride, they get their propulsion from the Sun, so they don't need to carry propellant, but they come with their own challenges. A sail has a large surface area but a low mass, which creates a huge moment of inertia and makes it difficult to control, especially with reaction wheels. A team of engineers have cracked it though with "smart mirrors" that can instantly switch their reflectivity on command, transforming sunlight from an unruly force into a precision steering tool.

The early universe was shrouded in darkness. Just hundreds of millions of years after the Big Bang, a thick fog of hydrogen gas choked the cosmos, blocking light from traveling far. At some point, this gas became ionized, stripped of its electrons. Thanks to the James Webb Space Telescope, astronomers have identified the culprit: low-mass starburst galaxies emitting huge amounts of ultraviolet light. In just one patch of sky. They discovered 83 of these galactic powerhouses in one part of the sky at a time when the Universe was only 800 million years old.

An international team of astronomers using the [*Cosmology Large Angular Scale Surveyor*](https://sites.krieger.jhu.edu/class/) (CLASS) [reported the first-ever measurement](https://hub.jhu.edu/2025/06/11/telescopes-look-at-cosmic-dawn/) announced the first-ever detection of radiation from the cosmic microwave background (CMB) interacting with the first stars in the Universe.

We don't know what dark matter is, but that doesn't stop astronomers from using it to their advantage. Dark matter is part of what makes gravitational lensing so effective. Astronomers expect the Roman Space Telescope to find 160,000 gravitational lenses, and dark matter makes a crucial contribution to these lenses.

When astronauts finally reach Mars, they'll face a unique challenge: walking and working in gravity that's only 37% as strong as Earth's. After spending months in the weightlessness of space, their weakened muscles and bones will struggle to cope with even this reduced gravity. Now, researchers at the University of Bristol have developed a promising solution; a soft, wearable exosuit powered by inflatable "bubble muscles."

When the Apollo astronauts landed on the Moon, they discovered drifts of tiny brilliant orange glass beads glittering across the surface. Each one less than 1 mm across and formed about 3.6 billion years ago. These microscopic treasures, each smaller than a pinhead, had been hiding their secrets for billions of years. Now, cutting edge technology has finally cracked the mystery: they're perfect time capsules from the Moon's explosive volcanic past, frozen droplets of ancient lava that solidified instantly in the airless void recording the history of the Moon.

The Hubble Deep Field revolutionised astronomy by staring at a seemingly empty patch of sky for thousands of hours, unveiling a cosmos teeming with distant galaxies. But even Hubble can't peer back far enough to witness the universe's first moment of illumination; the Cosmic Dawn, when primordial darkness gave way to starlight. Now, the Square Kilometre Array promises to shatter that barrier. In a groundbreaking simulation, researchers have modelled 1000 hours of SKA observations, creating astronomy's next great deep field, one designed to capture the universe's very first sunrise.

The ecliptic is the apparent path that the Sun follows during a year. It's an imaginary line that the planets follow, with some small deviations, around the Sun. Spacecraft find it easier to follow the ecliptic because it's generally more energy efficient. However, the Solar Orbiter isn't on the ecliptic and it's giving us our first up-close looks at the Sun's poles.

For most of us, dust is just something we have to clean up. For astronomers, interstellar dust is a hindrance when they want to study distant objects. However, recent James Webb Space Telescope (JWST) observations of a distant galaxy are changing that. This infrared-sensitive observatory is letting them find a way to use dust to understand the evolution of early galaxies. In addition, it uncovered a special property of that galaxy's ice-covered dust, indicating it could be similar to the materials that formed our Solar System.

Most scientists agree that supernova explosions have affected Earth's climate, though the details are not all clear. They likely cooled the climate several times in the last several thousand years, just as humanity was becoming established around the world. The evidence is in telescopes and tree rings.

Astronomers have used JWST to study a fascinating planetary system that's only 16.7 million years old, with two bizarre giant exoplanets. Designated YSES-1, its closer planet, YSES-1b seems to be surrounded by a disk of material that could be the birthplace of moons, similar to what might have happened at Jupiter billions of years ago. The other, YSES-1c, has a layer of silicate particles in its upper atmosphere—clouds of sand.

Astronomers have discovered the site of a newly forming exoplanet, probably with several times the mass of Jupiter. The image was captured by ESO's Very Large Telescope, seeing the young star system 2MASS 1612 in infrared light. The disk extends about 130 astronomical units from the star, but you can see a bright ring followed by a gap at about 50 AU. It's believed there's a new planet forming in that gap, pulling in material from the disk of gas and dust around it.

As worldwide temperatures continue to rise and conventional solutions aren't working fast enough, governments may turn to geoengineering solutions. One idea is to place a giant sunshade somewhat like an umbrella between the Earth and the Sun to block some of the sunlight that reaches our planet. A new mission proposes sending an 81 m² sail to Earth-Sun L1 to measure the effect of blocking a tiny fraction of solar energy.

When the Sun rages and storms in Earth's direction, it changes our planet's atmosphere. The atmosphere puffs up, meaning satellites in Low-Earth Orbit (LEO) meet more resistance. This resistance creates orbital decay, dragging satellites to lower altitudes. One researcher says we can change the design of satellites to decrease their susceptibility.

Gas clouds in the Milky Way's Galactic Center contain copious amounts of star-forming gas. But for some reason, few massive stars form there, even though similar gas clouds elsewhere in the galaxy easily form massive stars. The clouds also form fewer stars overall. Are they a new type of molecular cloud?

About 3 billion years after the Big Bang, star formation exploded across the cosmos. During the era dubbed "cosmic noon.” It was also when galaxies and supermassive black holes were growing faster than at any other time in the history of the universe. Now astronomers have discovered a monster from this frenzied period: a supermassive black hole unleashing jets that stretch over 300,000 light-years into space, revealing the sheer violence of its feeding frenzy.

How can radio astronomers successfully identify extraterrestrial radio signals while discerning them from Earth-based radio signals? This is what a recent study published in The Astronomical Journal hopes to address as a team of researchers investigated how machine learning could be used to search for extraterrestrial technosignatures while simultaneously identifying radio contamination from human radio signals. This study has the potential to help radio astronomers develop more efficient methods in searching for and identifying radio signals from extraterrestrial civilizations.

Most exoplanets have been detected indirectly through the transit or radial velocity method. But here's an image of the exoplanet 14 Herculis c captured by Webb. It has been described as a "chaotic" and "abnormal" planetary system and is about 7 Jupiter masses, but with a surface temperature of only -3°C. The discovery offers new insights into how planetary systems can develop in dramatically different ways from our own Solar System.

Astronomers recently used a pair of powerful telescopes to zero in on a cosmic battle going on some 11 billion light-years away from us. The combatants are a pair of galaxies charging at each other over and over again, at velocities upwards of 500 kilometers per second. According to one of the scientists studying the scene, one galaxy is cutting into the heart of the other with a blast of radiation.

NASA's 2001 Mars Odyssey orbiter captured this incredible image of the giant shield volcano Arsia Mons, poking through the cloud tops at Martian dawn. Arsia and the other megavolcanoes on Mars are so tall they're often surrounded by water ice clouds in the early morning. Odyssey is normally staring straight down, so to capture this unique angle, it had to rotate 90 degrees while in orbit so that it could capture a side perspective view of the volcano.

As astronomers found more and more exoplanets in recent years, they've discovered an unusual gap in the population. It's called the Neptunian Desert, a curious scarcity of Neptune-sized exoplanets orbiting close to their stars. Researchers just discovered an exoplanet in the Neptunian Desert around a Sun-like star. Can it help explain the Desert?

Now I know this sounds like a low-budget knockoff of Five Nights at Freddy's, but it's the real deal

The Earth's atmosphere is protected by a magnetosphere, but Mars lacks this protective shield and lost its atmosphere to space long ago through interactions with the solar wind. In a new paper, scientists report that they have directly observed this process of "atmospheric sputtering," watching how incoming ions from the solar wind directly cause neutral atmospheric particles to escape. They found the process is stronger than anticipated, especially in solar storms.