Voyager found Neptune emits 2.61 times the solar energy it absorbs, exposing an internal heat flow still far stronger than the revised estimate for Uranus.
Io's ground can move by as much as 100 metres as Jupiter's changing tide flexes the moon, converting orbital energy into the heat that drives its volcanoes.
SR-1 Freedom would start a 20-kilowatt-electric HALEU reactor after Earth escape, power a Hall thruster and deliver three SkyFall helicopters at Mars in 2029.
SOHO traced Earth's neutral-hydrogen geocorona beyond the Moon, but its density at lunar distance is only about 0.2 atom per cubic centimetre.
Chandrayaan-1 found hematite near the lunar poles. Orbital patterns and laboratory tests point to oxygen ions escaping Earth and reaching the Moon through our magnetotail.
Solar-wind speed, density, temperature, pressure and magnetic-field strength all rose after the deep 2008 minimum, reversing a decline that had persisted since the 1980s.
A normal lunar night lasts about 354 hours. Near the south pole, terrain can keep the Sun visible far longer, but even the brightest sites still need stored power.
Satellite reentries are adding alumina nanoparticles to the upper atmosphere. The ozone-depletion pathway is credible, but current models disagree sharply on its scale.
Phoenix measured 0.4 to 0.6 per cent perchlorate in Martian soil. NASA's 2026 dust limit shows why the thyroid hazard is real but manageable through habitat engineering.
A NASA battery-pallet fragment struck a Florida home, revealing how international space law routes liability through launching states while victims rely on diplomatic or domestic claims processes.
Dragonfly's July 2028 target launch begins a six-and-a-half-year journey to Titan, where a nuclear-powered flying laboratory will compare organic dunes, weather and impact terrain.
Launch cost has fallen dramatically, but Shuttle, Falcon and Starship figures measure different things. The sub-$100/kg case still depends on full reuse, cadence and full payloads.
AI data centres need electricity after sunset. Google and Amazon are helping finance gigawatt-scale storage, but duration, firm generation and flexible demand still matter.
The 140-trillion-oceans figure is a modelled inventory of diffuse water vapour around a gravitationally lensed quasar at redshift 3.91.
Europa may contain about 3 billion cubic kilometres of liquid water, while Enceladus offers spacecraft direct access to material from a hidden ocean.
Fram2's 90-degree orbit was a genuine human-spaceflight first. NASA came close with a polar shuttle plan at Vandenberg, but no government crew ever flew the route.
