All articles
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Stargazing
Galaxy Season: A Guide to Observing the Local Group This Autumn
Every autumn the great galaxies of the Local Group rise into prime viewing position. Here's how to find M31, M33, and their satellites — and what you're actually looking at when you do.
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Missions
ESA's Hera Mission Is About to Rewrite What We Know About Asteroid Deflection
NASA's DART proved we can move an asteroid. Now ESA's Hera spacecraft is arriving at Didymos to find out exactly what happened — and whether planetary defense is ready for a real threat.
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Science & Discovery
When Neutron Stars Collide: How Kilonovae Forge the Universe's Heavy Elements
Gold, platinum, uranium — the heaviest elements in the periodic table weren't forged in ordinary stars. They were made in the violent milliseconds of neutron star mergers, and in 2017, we watched it happen for the first time.
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Astronomy
Inside a Stellar Nursery: How the Orion Molecular Cloud Builds Stars
The Orion Molecular Cloud is the nearest massive star-forming region to Earth — a turbulent, ultraviolet-blasted environment where new solar systems are assembling right now, and JWST has given us our sharpest look yet.
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Commercial
The Upper Stage Problem: Why Reusable Second Stages Are Harder Than They Look
Recovering and reusing first stages was the revolution. But upper stages — which must survive orbital velocities and reentry — are a fundamentally harder problem, and the industry's three main bets are taking very different approaches.
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Military Space
The SDA's Transport Layer: America's Proliferated Military Satellite Constellation
The Space Development Agency is building a mesh network of hundreds of small military satellites in low Earth orbit — a fundamentally different approach to space-based command and control than anything the US has operated before.
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Missions
VIPER Is Cancelled. Here's Why NASA's Ice-Hunting Rover Mattered.
NASA cancelled the VIPER rover in 2024 after costs ballooned and schedules slipped. The science it was supposed to do — characterizing water ice at the lunar south pole — still needs to be done before Artemis astronauts go there.
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Military Space
Anti-satellite weapons are real, tested, and leaving debris clouds that threaten everyone
China, Russia, the US, and India have all tested direct-ascent anti-satellite missiles. The debris those tests create persists for decades. The tension between military necessity and orbital sustainability is becoming one of the defining strategic problems of the 2020s.
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Military Space
GPS jamming and spoofing: the quiet threat that's getting louder
GPS signals are extraordinarily weak and easy to jam. Military and civilian aircraft across the Middle East, Baltic, and Black Sea regions are routinely encountering jamming and spoofing that sends their navigation systems to completely wrong locations. The problem is growing.
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Military Space
Space is already a battlefield. Ukraine showed us what that looks like.
The war in Ukraine has been the first large-scale test of satellite capabilities in peer conflict. GPS jamming, Starlink dependence, reconnaissance satellites, and Russian anti-satellite threats have all featured — and the lessons are reshaping military space doctrine worldwide.
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Military Space
The Space Force is quietly replacing its aging satellite backbone. Here's what's new.
GPS III, Next Gen OPIR missile warning satellites, and the Evolved Strategic SATCOM program are replacing Cold War-era systems that have been showing their age. The upgrades are designed to survive a contested space environment that didn't exist when the original satellites were built.
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Military Space
What the Space Force actually does — and why it matters more than most people realize
The US Space Force is the world's first independent space military branch. Its missions — protecting GPS satellites, tracking debris, watching for missile launches — are largely invisible but underpin nearly every aspect of modern warfare and daily civilian life.
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