SPACE/COSMOS
SpaceX has quietly launched a spacecraft almost no one knew existed

Rumours have circulated that it could be used to transport military hardware.
Called Starfall, the spacecraft quietly lifted off on a Falcon 9 rocket on Tuesday on a test mission.
Here is everything we know about the mission.
The launch caught many space enthusiasts off guard, with SpaceX revealing virtually nothing about Starfall beforehand, and that secrecy carried through to launch day when the company abruptly cut its webcast just ten minutes after liftoff.
The launch comes as news broke that SpaceX boss Elon Musk lost his trillionaire status on Wednesday after stocks in his companies, SpaceX and Tesla, dropped following an initially successful public offering.
What is its purpose?
In a Federal Aviation Administration (FAA) filing, SpaceX says Starfall could offer "access to microgravity and vacuum" for companies interested in space manufacturing and "point-to-point delivery of critical cargo through space on rapid timelines," which could mean missiles or military hardware.
No official confirmation exists that Starfall is intended for military use, however, the muted launch has circulated rumours that it could be used precisely for that.
The US Defense Department has long pursued the idea of using rockets to deliver large loads anywhere on Earth at speed.
SpaceX also already holds multiple contracts with the Pentagon, including one called Project Cargo, which envisions Starship delivering supplies across the globe.
Each Starfall capsule can carry 2,200 lbs or around 998 kilograms of payload, according to the FAA filings. They each have one extension for the payload and one for the heat shield.
The capsule can adjust its orientation mid-flight using inert gases, but it cannot deorbit on its own; it either follows a pre-programmed flight path or relies on another spacecraft to bring it down.
“Today's mission includes a demo of a new vehicle that will enable affordable, routine access to the microgravity environment for scientific research and in-space manufacturing," SpaceX posted on X Tuesday.
"After demonstrating controlled flight, the spacecraft will splash down in the Pacific Ocean," it added.
Each Starfall capsule is about 75 centimetres tall and 3.1 metres across and able to carry approximately 1,000 kilograms of payload, per the FAA filings.
This illustration depicts the Sun-like star TOI-791 and two giant planets that NASA's TESS space telescope discovered in its orbit. These planets, designated TOI-791 b and TOI-791 c, are roughly the size of Jupiter but a tiny fraction of its mass, meaning they have an extraordinarily low density.
June 25, 2026
Eurasia Review
An international collaboration has discovered two of the lowest-density giant planets ever detected: rare ‘super-puff’ planets with densities lower than candy floss. The study -led by the University of Oxford, in collaboration with Université Côte d’Azur/Observatoire de la Côte d’Azur and the University of Birmingham – has been published in Monthly Notices of the Royal Astronomical Society.
The two planets, named TOI-791 b and TOI-791 c, orbit an F7-type dwarf star located around 1,110 light years from Earth in the southern constellation Volans. Although both planets are roughly the size of Jupiter, they are extraordinarily diffuse: TOI-791 b has a density of just 0.038 grams per cubic centimetre, while TOI-791 c has a density of 0.047 grams per cubic centimetre. By comparison, Jupiter’s average density is 1.33 grams per cubic centimetre, around 28 to 35 times greater.
Their densities are even lower than candy floss, which typically has a density of about 0.05 grams per cubic centimetre. In contrast, Earth’s density is 5.5 grams per cubic centimetre.
The planets are “siblings”, believed to have formed together from the same disc of gas and dust surrounding their young star. They are also locked in a rare gravitational relationship known as a 5:3 mean-motion resonance, meaning that for every five orbits completed by the inner planet, the outer planet completes almost exactly three. This gravitational interaction causes the planets to repeatedly tug on one another, producing measurable shifts in the timing of their transits across the host star.
Only four other systems are known to contain multiple super-puff planets. This makes TOI-791 an exceptionally rare laboratory for studying how these planets form and evolve.
Lead author Dr George Dransfield (she/her) (Department of Physics, University of Oxford and a presenter for BBC Sky at Night) said: “Only a handful of these super-puffy planets are known, and it is even rarer to find two in the same system. Their extremely low densities make them fascinating targets for understanding how planetary systems form and evolve.”
TOI-791 b and TOI-791 c were first identified as candidate planets in 2019 and 2023 respectively, by volunteers participating in the Planet Hunters TESS citizen-science project. This searches data from NASA’s Transiting Exoplanet Survey Satellite (TESS) for possible new worlds. The researchers then measured the planets’ densities by combining observations of their sizes and masses using telescopes around the world.
When a planet passes in front of its host star – an event known as a ‘transit’ – it slightly dims the star’s light. The amount of dimming reveals the planet’s size. In this system, the researchers also detected subtle variations in the timing of the transits, caused by the two planets gravitationally tugging on one another as they orbit the star. By analysing these timing shifts, the team was able to estimate the planets’ masses and calculate their remarkably low densities.
The discovery relied on eight years of observations, including from the ASTEP (Antarctic Search for Transiting ExoPlanets) telescope at Concordia Station in Antarctica, jointly operated by researchers from Université Côte d’Azur/Observatoire de la Côte d’Azur and international collaborators. The Antarctic winter provided a unique advantage: months of continuous darkness enabled astronomers to capture the planets’ exceptionally long transits, each lasting more than 11 hours, in a single uninterrupted observation. These are the longest continuous planetary transits ever observed in their entirety from the ground.
Astronomers are still debating how super-puff planets form. One leading theory suggests that they possess enormous hydrogen- and helium-rich atmospheres that make up a significant fraction of their total mass. These giant gaseous envelopes may have accumulated when the planets formed far from their host star in cold regions of the protoplanetary disc, where gas could cool and gather rapidly around a solid core.
The researchers intend to carry out follow-up investigations to understand more about how these planets formed, and to rule out some of the leading super-puff explanations.
Professor Amaury Triaud (University of Birmingham), the UK Principal Investigator of ASTEP and co-author of the study, said: “This system offers a unique laboratory for understanding how super-puff planets form and evolve. We propose to carry out space-based observations using the James Webb Space Telescope to assess if the puffy atmosphere contains carbon-, nitrogen-, and oxygen-bearing species, revealing new insight into how these unusual planets formed.”
Professor Tristan Guillot (Université Côte d’Azur), Principal Investigator of ASTEP and co-author of the study, added: “These multi-planetary systems are complex, with gravitational interactions between the planets that evolve over very long periods, tens of years or more. This discovery highlights the importance of continued international collaboration in astronomy. Bringing together observations from Antarctica, space telescopes and observatories across several continents was essential to revealing the true nature of these extraordinary planets.”
June 27, 2026
By Eurasia Review
In May 2024, auroras were observed at unusually low latitudes across the globe, lighting up skies that rarely see such displays. Inside Earth’s magnetosphere, the region of space surrounding our planet and dominated by its intrinsic magnetic field, something significant was finally being observed.
It started with a large sunspot firing a rapid series of powerful solar eruptions. Clouds of magnetized plasma merged as they traveled through space and impacted Earth’s magnetosphere. No geomagnetic storm this powerful had ever been measured in the Earth’s ring current region, a belt of charged particles in space near our planet.
Two sources of ring current ions are known: solar wind and Earth’s ionosphere, the electrically charged upper layer of the atmosphere. For decades, scientists have debated how much each source contributes to the ring current. During most storms, both contribute. However, during a storm driven by a dense solar wind, some scientists expected solar wind ions to continue to play a notable role. Yet the first direct measurements of ring current composition from a super geomagnetic storm revealed that solar wind ion contributions were minimal, and the level of Earth-origin ion dominance had never been observed before.
The findings, published in Science Advances, suggest that understanding how much Earth’s ionosphere contributes to the ring current may be essential to accurately predict the severity of super geomagnetic storms. The dominance of ionospheric ions, which are far heavier than solar wind particles, may have intensified the magnetic disturbance and concentrated the ring current peak unusually close to Earth. The researchers also make a case for a proposed Japanese multi-satellite mission to understand exactly how ion supply processes work.
Earth’s ring current
On May 10 and 11, 2024, giant clouds of charged particles from the Sun struck Earth’s magnetosphere. The resulting May 2024 super geomagnetic storm, also referred to as the “Gannon storm” or “Mother’s Day storm,” reached a minimum SYM-H index of −518 nanotesla, the second-largest value recorded since 1981. The last comparable geomagnetic storm was the November 2004 superstorm.
“Some super or extreme geomagnetic storms are not just impressive light shows—they pose radiation risks to spacecraft, disturb GPS signals and communications, and cause power outages. Understanding how a geomagnetic storm develops is not only a scientific question, but also one with real-world consequences,” said Naritoshi Kitamura, lead author and designated assistant professor from the Institute for Space-Earth Environmental Research (ISEE) at Nagoya University.
The magnetic disturbance of a geomagnetic storm is caused by the ring current. This is a huge belt of energized ions, mostly oxygen and hydrogen, that drift slowly around Earth thousands of kilometers above the equator. The energized ions carry current, and that current generates a magnetic field that partially cancels Earth’s own on the ground. This causes the disturbance that is observed by ground-based instruments.
Arase was ready: rare event, first of its kind observation
Japan’s Arase satellite was launched in 2016 and has been operated by the Japan Aerospace Exploration Agency (JAXA). The ERG (Arase) science center is jointly operated by Institute of Space and Astronautical Science (ISAS)/JAXA and Institute for Space-Earth Environmental Research/Nagoya University.
Arase orbits the region where the ring current develops. The satellite carries specialized instruments to identify mass and energy of detected ions. It crossed through the ring current just after the storm began, and again near its peak.
“This is the first simultaneous observation of ring current ions and solar wind during a storm this large, and the data was clear—approximately 85% of ions were oxygen from Earth’s own ionosphere,” Kitamura explained.
“Near the peak of the storm, Arase detected a 40% decrease in magnetic field intensity at roughly 16,000 kilometers above Earth, and much closer to Earth than similar large decreases previously documented.”
The same region also showed a simultaneous drop in high-energy electrons that normally orbit Earth in that zone. When a magnetic field weakens this severely, electrons drift out from their normal paths. Whether the magnetic field deformation caused the electron loss warrants further investigation.
The findings deepen our understanding of how super geomagnetic storms develop. Space weather forecasting models rely on solar wind conditions to predict storm severity, but this study suggests Earth’s atmospheric state, and not just conditions at the Sun, may partly determine how severe a storm becomes.
The study also supports FACTORS, a two-satellite mission concept being prepared for JAXA’s upcoming proposal opportunity, which would directly address this gap. FACTORS aims to improve our understanding of how Earth’s atmospheric ions escape into the magnetosphere and contribute to geomagnetic storm development. It may ultimately help scientists more accurately predict how severe these storms will get.





