Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: satellites

Catching distant gamma-ray explosions with precisely aligned X-ray optics

Gamma-ray bursts (GRBs) rank among the most powerful explosions in the universe, releasing immense energy in intense flashes of gamma rays. The most distant GRBs originate from the era when the first stars and galaxies formed. Detecting them allows astronomers to probe the early universe and understand how the first heavy elements formed and how the earliest stellar populations lived and died. Missions like HiZ-GUNDAM, a satellite planned for launch in the 2030s by the Japan Aerospace Exploration Agency (JAXA), aim to detect these distant explosions in real time.

However, detecting GRBs presents a major challenge. These explosions appear unpredictably across the sky, and their afterglows fade rapidly. Astronomers must therefore detect each burst quickly and determine its position immediately so that other telescopes can observe it. Wide-field X-ray monitors provide one solution, as they can observe large regions of the sky and determine the direction of incoming signals.

Some designs use lobster-eye X-ray optics, inspired by the way lobsters’ compound eyes collect light from many directions simultaneously. Yet building a single optical system from multiple lobster-eye segments and aligning them precisely remains a difficult technical task.

Scientists May Have Found the Key to Jupiter and Saturn’s Moon Mystery

Jupiter and Saturn, the two largest planets in our Solar System, also host the most extensive systems of moons. Jupiter is currently known to have more than 100 moons, while Saturn, along with its prominent ring system, has more than 280.

Despite these large numbers, their moon systems are very different. Jupiter has four major moons, including Ganymede, the largest moon in the Solar System. Saturn, on the other hand, is dominated by a single standout moon, Titan, which ranks as the second largest.

Because both planets are gas giants, scientists have long tried to understand why their satellite systems developed so differently. Existing theories of moon formation offer some explanations, but recent research on stellar magnetic fields suggests those ideas may need revision. One key question involves magnetic accretion and whether an inner cavity can form in Jupiter’s circumplanetary disk, the accumulation of material orbiting a planet from which satellites may form.

Earth observation operators push to deliver satellite images within minutes

Vantor employees were gathered for a sales kickoff in January, when an executive announced that a WorldView Legion satellite passing overhead would snap a photo of the California venue. Later, a buzzer sounded to alert the audience that the 30-centimeter-resolution image was available on the Vantor Hub portal. It had been 13 minutes.

The demonstration was meant to show how quickly satellite imagery can move from collection to delivery — since commercial and government customers want data quickly.

Data latency, the time between image capture and delivery, has long been a key metric for Earth observation customers. But expectations are shifting as customers want intelligence they can use in real time.

Astronomers discover Andromeda XXXVI, an ultra-faint dwarf satellite galaxy

By analyzing the data from the Pan-Andromeda Archaeological Survey (PandAS), European astronomers have discovered a new satellite of the Andromeda galaxy. The newfound object, which received the designation Andromeda XXXVI, appears to be an ultra-faint dwarf galaxy. The finding is reported in a paper published March 30 on the arXiv preprint server.

The so-called ultra-faint dwarf galaxies (UFDs) are the least luminous, most dark matter-dominated, and least chemically evolved galaxies known. Therefore, they are perceived by astronomers as the best candidate fossils from the universe at its early stages.

Now, a team of astronomers, led by Joanna D. Sakowska of the Institute of Astrophysics of Andalusia in Spain, reports the finding of a new UFD. Andromeda XXXVI was first spotted and classified as a candidate UFD by amateur astronomer Giuseppe Donatiello during a systematic, visual inspection search of public images from the full PAndAS footprint. Sakowska and her colleagues recently performed follow-up deep imaging of Andromeda XXXVI with the Roque de los Muchachos Observatory, which confirmed the UFD nature of this galaxy.

NOAA’s Space Weather Mission: Protecting Artemis II Astronauts and Society

For the majority of its orbit, the moon remains outside Earth’s magnetic field and is directly exposed to the full force of the solar wind and energetic solar particles. Artemis II astronauts will therefore spend time outside this naturally occurring protective shield. Any overlap between periods of heightened solar activity and time spent beyond Earth’s magnetospheric protection could pose significant radiation risks to the crew.

NASA relies on operational space weather forecasts and warnings from NOAA’s Space Weather Prediction Center (SWPC). As the nation’s official around-the-clock space weather forecasting authority, SWPC provides direct, real-time support to human spaceflight missions. Observations from NOAA’s GOES satellites and the SOLAR-1 observatory at Lagrange point 1 will provide important measurements of solar wind speed, magnetic field orientation, and the flow of hazardous, high-energy particles. These observations allow SWPC to issue timely warnings if radiation levels approach thresholds that could affect astronaut safety. During the Artemis II mission, NOAA forecasters will continuously monitor solar wind conditions and evaluate any solar flares, coronal mass ejections (CMEs), or solar energetic particle events that may occur.

The Solar Ultraviolet Imager (SUVI), Extreme Ultraviolet and X-Ray Irradiance Sensors (EXIS), Space Environment In-Situ Suite (SEISS), and Magnetometer (MAG) are specialized instruments onboard the GOES-R Series satellites that measure solar activity and changes in Earth’s magnetic field. Additionally, the Compact Coronagraph (CCOR-1) onboard GOES-19 further enhances the detection of CMEs by providing continuous real-time monitoring of the sun’s corona, improving both measurement quality and warning lead time.

Unexplained sky flashes from the 1950s: Independent analysis supports their existence

Historical observations from an observatory in Germany have now independently verified evidence for brief, mysterious flashes of light in the night sky, first picked up by an American astronomical survey in the 1950s. Through fresh analysis of a German survey from the same period, independent researcher Ivo Busko, a now-retired developer at NASA, has uncovered striking new support for these puzzling signals. The results have been published as a preprint on arXiv.

In 2019, an international team of astronomers launched the VASCO Project, aiming to identify unusual phenomena hidden within vast archives of historical data. In particular, their work focused on astronomical transients: objects that suddenly appear in the sky in some images, but vanish in subsequent observations.

An especially exciting result emerged in 2025, when researchers analyzed photographic plates captured as part of the Palomar Observatory Sky Survey. Carried out in California throughout the 1950s, this ambitious program produced nearly 2,000 images of the night sky using long-exposure plates. Within these images, the team found clear evidence of transients with strange appearance and behavior, captured at a time that predates the launch of any human-made satellites.

Space launches are changing the chemistry of Earth’s atmosphere, studies warn. Here’s what can be done

Look up on a clear night and you’ll see the streaks of our new space age. What you don’t see is the growing fallout for the atmosphere that keeps us alive.

A wave of satellite launches and reentries is changing the chemistry and physics of the middle and upper atmosphere.

Studies warn of ozone depletion, stratospheric heating and new metal aerosols from burning spacecraft. The pace is accelerating fast and unless we redesign how we use and retire satellites, we risk swapping one environmental problem (congestion in Earth orbit from too many spacecraft) for another (an atmosphere seeded with rocket soot and satellite ash).

Holistic space observation: the shift from SSA to SDA

Recent reporting on SpaceX’s proposal to deploy up to one million satellites in low Earth orbit — paired with a vision of AI-enabled, autonomous orbital infrastructure — marks a decisive moment for the space community. Regardless of whether these numbers ultimately materialize, the direction is unmistakable: space is moving toward unprecedented scale, autonomy and strategic importance.

That reality demands a fundamental reassessment of what space awareness really means.

For decades, space situational awareness (SSA) focused on orbital mechanics: where an object is, where it will be and whether it might collide with something else. That model is now insufficient. Satellites are no longer passive nodes governed primarily by physics; they are software-defined, networked systems deeply integrated with terrestrial cyber infrastructure, global supply chains and increasingly AI-driven decision loops.

‘Miracle’: Europe reconnects with lost spacecraft

The European Space Agency announced Thursday it has re-established communication with a spacecraft that is part of its Proba-3 mission, after losing contact with the satellite a month ago.

Proba-3, which launched on a two-year mission in 2024, uses two spacecraft flying in precise formation to simulate a solar eclipse more than 60,000 kilometers (37,000 miles) above Earth.

Scientists have used this delicate dance to get a rare glimpse of the sun’s little-known outer atmosphere, which is called the corona.

/* */