Massimo Luciani

A graph with the conservative habitable zone illustrated by the orange band and ellipses illustrating the extended habitable zone proposed by this study

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An article published in “The Astrophysical Journal” reports the results of a study on the habitable zone that goes beyond the so-called conservative zone because it’s based on rigid assumptions. Astrophysicist Amri Wandel of the Hebrew University of Jerusalem focused on examining the conditions existing in systems of low-mass stars: orange dwarfs (K-class stars) and red dwarfs (M-class stars). The study specifically considered planets tidally locked to their stars.

Amri Wandel conducted an analysis using climate models that account for global heat transport, the greenhouse effect, and albedo. This led him to conclude that these stars may host planets potentially habitable for Earth-like life forms orbiting outside the conservative habitable zone.

The Shenzhou 20 spacecraft's capsule after landing (Photo courtesy Xinhua/Li Zhipeng)

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A few hours ago, the Shenzhou 20 spacecraft landed after spending 270 days docked at the Chinese Tiangong space station, where it arrived on April 24, 2025, carrying three taikonauts: Chen Dong, Chen Zhongrui, and Wang Jie. The Shenzhou 20 departed the station about nine hours earlier and landed at a site called Dongfeng in China’s Inner Mongolia Autonomous Region. The three taikonauts returned to Earth on November 14, 2025, aboard the Shenzhou 21 spacecraft because the Shenzhou 20 suffered small fractures to a window following the impact of what was likely space debris and was deemed unsafe for human transport. Despite this, the preliminary inspection showed that the Shenzhou 20 is generally in good condition.

The Crew Dragon Endeavour spacecraft recovered at the end of its Crew-11 mission (Image NASA)

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A little while ago, SpaceX’s Crew Dragon Endeavour spacecraft completed its Crew-11, or SpaceX Crew-11, mission for NASA with a successful splashdown. Aboard were astronauts Zena Cardman, Michael Fincke, and Kimiya Yui, and cosmonaut Oleg Platonov, who had arrived at the International Space Station on August 2, 2025, as part of Expedition 73/74. The Crew-11 members ended SpaceX’s 11th regular crewed mission in the Pacific Ocean, off the coast of California. The Crew Dragon had left the Station approximately 11 hours earlier.

The Crew-11 mission ended a few weeks early in what was described as a medical evacuation due to a medical condition affecting one of the crew members. For privacy reasons, no details were released, starting from the identity of the person who’s suffering the health issue.

A Falcon 9 rocket lifting off on the Twilight rideshare mission (Image courtesy SpaceX)

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A few hours ago, a Falcon 9 rocket launched from Vandenberg Air Force Base on the Twilight rideshare mission, carrying a total of 40 satellites in various phases. About two hours and twenty minutes after launch, the final group of satellites was deployed by SpaceX’s system. Among them were NASA’s Pandora Space Telescope and the BlackCAT and SPARCS nanosatellites, both 30x20x10-centimeter CubeSat-class satellites, part of NASA’s CubeSat Launch Initiative. These satellites will conduct their astronomical observations from low-Earth orbit.

The location of Cloud-9 (Image NASA, ESA. G. Anand (STScI), and A. Benitez-Llambay (Univ. of Milan-Bicocca); Image processing: J. DePasquale (STScI))

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An article published in “The Astrophysical Journal Letters” reports the discovery of what was dubbed Cloud-9, which can be described as a failed galaxy. A team of astronomers used observations with the FAST radio telescope to identify what appears to be a new type of astronomical object, and follow-up observations with the Hubble Space Telescope, the Green Bank Telescope (GBT), and the Very Large Array (VLA) to confirm the existence of the first object of its kind that was identified with reasonable certainty.

Technically defined as a reionization-limited H i cloud (RELHIC), Cloud-9 is a starless gas cloud that is supposed to be composed of dark matter filled with hydrostatic gas in thermal equilibrium with the cosmic ultraviolet background. Cloud-9 will help test cosmological models regarding dark matter.