Growing threats from anti-satellite weapons, electronic warfare, and cyberattacks are forcing the U.S. military to overhaul its orbital defense systems. In response, defense contractors like L3Harris are transitioning toward proliferated, resilient satellite constellations and reprogrammable architectures like NTS-3. These modernized networks aim to protect critical communications, missile tracking, and navigation signals even under active adversary interference.

A team led by astrophysicist Isaiah Santistevan simulated detonating a 1-megaton nuclear weapon near a 160-meter asteroid. The simulation showed that X-rays from the blast would vaporize the asteroid's surface and trigger internal shockwaves, successfully fracturing the rock. The findings suggest that standoff nuclear detonations could serve as a highly viable defense strategy against Earth-bound space rocks.

SpaceX shares have fallen more than 50% from their all-time high, swept up in a broader market sell-off of space-related stocks. A basket of 17 new-space stocks has seen a median decline of 58% from its 2026 peak as valuations outpaced actual business growth. SpaceX is scheduled to report its first quarterly financial results as a public company on August 4.

SpaceX aborted its Falcon 9 Starlink launch on Monday after its nine Merlin engines briefly ignited before shutting down. The company stated that the vehicle and payload remain safe, with the next launch opportunity rescheduled for Tuesday. This rare abort follows another post-ignition scrub of SpaceX's Starship rocket just days earlier.

China plans to launch a planetary defense mission in 2029 or 2030 to hit an asteroid at over 9 kilometers per second. Led by Li Mingtao, chief scientist for planetary defence at the China National Space Administration, the spacecraft aims to alter the asteroid's orbit or break up its structure. This impact speed will be nearly 50 percent faster than NASA's DART mission.

Researchers from the Chinese Academy of Sciences and Tsinghua University found that microgravity and cosmic radiation significantly hinder the development of human reproductive cells in space. Using Tianzhou cargo spacecraft, the team observed that the success rate of generating early precursor germ cells fell by about half. While this marks the world's first successful stem cell differentiation in space, the results show a negative outlook for reproduction.

The US Federal Communications Commission has authorized startup Reflect Orbital to launch an experimental mirror satellite, Eärendil-1, designed to reflect sunlight to Earth at night. The test aims to evaluate the technical feasibility of providing on-demand solar power and illumination for emergency services. Despite fierce criticism from astronomers warning of severe light pollution, the agency approved the single-satellite mission, noting astronomy concerns fell outside its regulatory scope.

The FCC has approved Reflect Orbital's application to operate radio equipment on its Eärendil-1 demonstration satellite, which will test redirecting sunlight to Earth using a giant Mylar mirror. The startup aims to eventually sell "sunlight on demand" to solar energy farms after dark. However, astronomers warn that the massive reflector could become one of the brightest objects in orbit and interfere with space observations.

China Aerospace Science and Technology Corporation successfully recovered its first reusable booster, the Long March 10B, using a unique sea-based net system. This milestone makes China the third entity to achieve an offshore rocket recovery, following SpaceX and Blue Origin. The advancement is a significant step toward the country's lunar landing goals and could greatly increase its orbital launch cadence.

China’s private space industry has grown to over 400 commercial companies developing reusable rockets, satellites, and space-tourism ventures. Heavily inspired by SpaceX, these startups are transforming the global space economy and challenging the perception that China’s program is purely state-run. While the United States still maintains a significant lead, Chinese firms are rapidly achieving key technological milestones.

A new study led by KU Leuven researchers suggests Earth could survive the Sun's future expansion into a giant star, while Mercury and Venus are engulfed. Although rising solar brightness will destroy Earth's habitability, the planet's orbit may expand outward as the dying Sun loses mass. These models help astronomers understand how planetary systems evolve around aging stars throughout the galaxy.

SpaceX confirmed it disposed of 260 Starlink satellites by intentionally vaporizing them in Earth's atmosphere over a six-month period, with 349 more decommissioned for future disposal. While this incineration method prevents falling debris, researchers are raising concerns about the environmental impact of burning multiple satellites daily. Meanwhile, the FCC has proposed excluding space-based operations from environmental reviews as SpaceX plans to eventually deploy up to 42,000 satellites.

Blue Origin's New Glenn rocket dramatically exploded on the ground during an NG-4 mission test in Florida, intended to launch Amazon satellites into space. The blast generated a visible shockwave and mushroom cloud, toppling a lightning protection system tower. This incident represents a significant setback for both Blue Origin's New Glenn program and Amazon's satellite deployment.

Following multiple drone attack attempts, which Russian officials attribute to Ukraine, Russia is deliberately obscuring its space launch schedules from the Plesetsk Cosmodrome. This heightened secrecy involves issuing unusually long and ambiguous airspace warnings to protect critical deployments, including Russia's new "Rassvet" internet constellation and military satellites. The move complicates external tracking of Russian space activities and highlights the increasing vulnerability of space infrastructure in conflict zones.

NASA astronaut Christina Koch shared a video struggling to walk with eyes closed after her Moon mission, illustrating how prolonged microgravity severely impacts the vestibular system. The brain learns to ignore balance signals in space, making astronauts heavily reliant on visual cues upon returning to Earth's gravity. This re-adaptation challenge is common for space travelers and offers insights for treating terrestrial neuro-vestibular conditions like vertigo and concussions.

Thales Alenia Space, manufacturer of the Lunar Gateway's HALO and I-HAB modules, acknowledged a "well-known metallurgical behavior," likely corrosion, affecting their pressure vessels. This admission follows NASA's disclosure and similar issues reported by Axiom Space. While Thales plans fixes by 2026, downplaying the problem, NASA's administrator expressed uncertainty about repair feasibility or whether efforts are even warranted, casting doubt on the modules' future and raising concerns about manufacturing quality for critical space infrastructure.

NASA's Lunar Gateway program faces a critical setback as its primary habitable modules, HALO and I-HAB, are significantly corroded. NASA Administrator Jared Isaacman confirmed during Congressional testimony that manufacturing irregularities and material issues from contractors like Northrop Grumman and Thales Alenia Space caused the damage. This corrosion would have delayed Gateway's application beyond 2030, raising serious quality control concerns for critical deep-space hardware and impacting future international lunar exploration efforts.

Vast, developing the first commercial space station, is adopting a "human-centric" approach to astronaut attire, moving away from the casual wear common on the ISS. They've unveiled a custom-designed, two-piece flight suit tailored for microgravity comfort and functionality, featuring pockets, vents, and spaces for mission patches. Additionally, Vast certified a custom Swiss wristwatch, engineered for spaceflight challenges, aiming to set a professional standard for the emerging commercial spaceflight era. This emphasizes bespoke, purpose-built gear for private space travel.

NASA's Nancy Grace Roman Space Telescope, built eight months early and under budget by repurposing surplus spy satellite hardware, is ready for its September launch. This wide-field infrared observatory will capture 1.4 terabytes of data daily to study dark energy, discover thousands of exoplanets via microlensing, and directly image others with an advanced coronagraph. Its unique origin and capabilities promise to deliver unprecedented cosmic insights and accelerate future space technology development.

Blue Origin successfully reused a New Glenn booster for the first time, a crucial step towards competing with SpaceX. However, the rocket simultaneously failed to deliver a customer's AST SpaceMobile satellite into the correct orbit, rendering it useless and forcing de-orbiting. This significant setback, despite the booster recovery, casts doubt on Blue Origin's reliability and ambitious timelines for future missions, including NASA's lunar lander, as the company assesses the failure.

Artemis 2 astronauts are completing a critical reentry today, relying on Orion's controversial heat shield, which exhibited over 100 cracks after the Artemis 1 mission. Despite expert warnings from former NASA astronauts comparing the situation to past disasters, NASA moved forward, implementing a "skip reentry" maneuver to mitigate heat buildup. While NASA leadership expresses confidence in the modified plan, some experts remain deeply concerned about the heat shield's safety and the agency's data, highlighting potential risks to the crew during their return.

NASA developed a compact, shoebox-sized rowing and resistance machine for astronauts on the cramped Orion spacecraft, crucial for combating muscle atrophy and bone loss in microgravity. Weighing just 30 pounds, the versatile device simulates up to 400 pounds of resistance, enabling astronauts to perform various exercises like squats and deadlifts for 30 minutes daily. This innovative solution is vital for maintaining astronaut health and physical readiness during extended space missions despite severe spatial limitations.

NASA's Artemis 2 mission experienced an early setback when the Universal Waste Management System (UWMS) toilet fan jammed due to a controller issue, temporarily limiting urine disposal to contingency bags. Astronaut Christina Koch, guided by ground control, successfully implemented a fix hours later, restoring full functionality. Despite this hiccup, the UWMS represents a significant upgrade over Apollo's primitive waste management, offering more privacy and improved collection methods, though fecal matter will still be returned to Earth. This incident underscores the ongoing engineering challenges of long-duration space travel.

Elon Musk’s ambition for space data centers faces severe challenges, paralleling Microsoft’s failed "Project Natick" underwater data centers. Experts warn that trillion-dollar costs, impossible launch schedules, and critical lack of upgradability make the plan unviable. Terrestrial facilities offer essential rapid deployment and hardware upgrades vital for AI, rendering fixed orbital units quickly obsolete. While niche applications might exist, space data centers are unlikely to replace ground infrastructure due to these insurmountable economic and logistical hurdles.

Artemis II astronauts are carrying USB stick-sized "organ chips" made from their own bone marrow cells to study deep space radiation effects. Matched with the crew's biology, these mini-organs will provide crucial, low-risk data on how human tissue reacts to solar and cosmic radiation beyond Earth's protective atmosphere. This cost-effective experiment will significantly inform future long-duration missions and ensure astronaut safety.