The 93-billion-light-year observable diameter is a present comoving distance, not the length travelled by ancient photons. Distinguishing four cosmic horizons resolves the paradox.
DESI's three-year map strengthened the case for evolving dark energy, but the signal came from combined datasets and a 2026 result has since shifted part of the evidence back toward Lambda CDM.
WASP-127b's brief wind-speed record reveals how Doppler-shifted molecules can turn an unresolved exoplanet into the beginnings of a weather map.
A tiny dark-matter component could keep a primordial hydrogen-helium star bloated, spectrally cool and growing, potentially leaving a million-solar-mass black-hole seed.
2025 PN7 is a tiny Sun-orbiting quasi-satellite whose 60-year relationship with Earth comes from orbital modelling, while precovery images now trace its measured history to 2013.
Webb's clay signature on Larissa and Galatea links today's small moons to warm, water-altered interiors inside a much larger satellite generation destroyed long ago.
Rubin Observatory measured a 710-metre main-belt asteroid turning once every 1.88 minutes, implying cohesion comparable to rock under the study's model.
Earth's solar orbit, the Sun's galactic path and Andromeda's approach are real motions in different reference frames. They cannot be simply added, and constant shared motion is not something the body can feel.
Tidal heating turns orbital motion into internal energy. The same mechanism drives Io's lava, helps preserve Europa's ocean and powers Enceladus's south-polar vents.
InSight data can be modelled as water-saturated rock deep beneath Mars, but a 2026 reanalysis shows the planet-wide estimate remains highly sensitive to assumptions about the unseen crust.
Three hypervelocity stars give astronomers dated points along the Large Magellanic Cloud's past orbit, halving the allowed trajectory corridor in a new model.
A 24-satellite launch appears to have taken Starlink beyond 11,000 spacecraft in orbit, while active-satellite indexes continue to put its global share near two-thirds.
Galileo's only direct descent into Jupiter sampled an unusually dry hot spot. Its 58 minutes of data remain invaluable, but some results were local weather, not a global average.
GJ 523b packs 23.5 Earth masses into a world only 2.55 Earth radii wide, challenging models that expect such a massive young planet to retain a deep hydrogen-helium envelope.
Andromeda's faint central glow has travelled for roughly 2.5 million years, placing its departure near the emergence of the genus Homo.
Rubin Observatory's ten-year survey turns a 3.2-billion-pixel camera, rapid image processing and public alert brokers into a searchable record of the changing sky.
