Cotton-candy super-puff exoplanets & Rocket Lab launches SAR imaging - Space News (Jun 26, 2026)

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SAR imaging boosts disaster response and infrastructure monitoring because it can see through clouds and at night. Exploding rocket bodies worsen debris - A new brief highlights multiple in-orbit breakups of Chinese rocket bodies, producing long-lived debris that can persist for decades at higher altitudes. The story underscores how leftover upper stages can become fragmentation hazards for everyone operating in LEO. Botswana signs the Artemis Accords - Botswana is poised to become the 68th signatory of the Artemis Accords, joining a growing coalition shaping norms for peaceful and transparent civil space exploration. The move signals expanding African participation in space governance and diplomacy. Strawberry Moon and planet trio - Late June skywatching features the bright “Strawberry Moon” plus an easy-to-spot grouping of Mercury, Venus, and Jupiter low after sunset. It’s a timely reminder that many of today’s space headlines connect directly to what you can see tonight. Episode Transcript Cotton-candy super-puff exoplanets We’ll start with the strangest headline of the day: two “super-puff” exoplanets, TOI-791 b and TOI-791 c. They’re described as roughly Jupiter-sized, but with such tiny mass for their size that their overall densities come out lower than cotton candy. The system was first flagged by NASA’s TESS planet-hunting survey, then pinned down with follow-up observations that helped estimate size and mass. What makes this especially intriguing is that super-puffs are already rare—and finding two in the same system gives researchers a valuable comparison set. The big question now is how these planets stay so inflated: is it unusual atmospheric heating, an odd formation history, or something else keeping their envelopes puffed up despite not being classic “hot Jupiter” scorchers. Rocket Lab launches SAR imaging Next, launch news with a practical payoff back on Earth. Rocket Lab is preparing its Electron rocket for the “Ten Owl of Ten” mission from New Zealand, carrying a Synspective Strix synthetic-aperture radar satellite. SAR satellites don’t need daylight and they don’t care about cloud cover, because they actively transmit radar pulses and measure the return signal. That makes them extremely useful for rapid mapping after floods, earthquakes, and storms, and for quieter long-term monitoring like detecting ground subsidence or infrastructure shifts. Adding another satellite to Synspective’s constellation mainly means better coverage and faster revisits—more chances per day to image the same place when responders and planners need updates quickly. Exploding rocket bodies worsen debris Now to the orbital environment, where today’s message is blunt: debris lasts a long time, and breakups make it worse fast. A new brief focuses on multiple Chinese rocket bodies that have exploded in orbit, creating debris that can remain in low Earth orbit for decades depending on altitude. These aren’t portrayed as intentional events; they’re the kind of fragmentation that can happen when derelict upper stages are left with residual energy sources—like leftover propellants, pressurants, or batteries—that eventually fail. The key takeaway is that a single breakup turns one large object into a swarm, complicating tracking and collision avoidance for all satellite operators, not just the country that launched the stage. Botswana signs the Artemis Accords On the policy side, there’s a notable diplomatic update: Botswana is set to become the 68th country to sign the Artemis Accords. The Accords are a non-binding framework that lays out principles for civil space activity—things like peaceful purposes, transparency, interoperability, and sharing scientific data, along with expectations around registering space objects and encouraging responsible behavior. Botswana’s signing matters less as a near-term mission commitment and more as a signal: more nations, including in southern Africa, want a seat at the table as lunar exploration ramps up and as norms for space activity evolve. It’s a governance counterpoint to the debris story—if more countries and companies are going to operate in space, the “rules of the road” have to keep pace. Strawberry Moon and planet trio Finally, something you can do tonight: look up. Late June brings the full “Strawberry Moon,” a traditional name linked to seasonal harvest timing rather than the Moon literally turning pink—though low on the horizon it can look warm-colored thanks to our atmosphere. And if you have a clear western horizon after sunset, keep an eye out for a small planetary grouping: Venus is the bright anchor, Jupiter is also prominent, and Mercury can show up lower and closer to the horizon in twilight. No special gear required—just a few minutes, an unobstructed view, and the patience to let your eyes adjust to dusk. 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