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Space News from SpaceDaily.Com brings the space industry professional daily news from the frontier, with contract, bid, launch and on-orbit satellite news as it happens.
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Planets larger than Earth but smaller than Neptune are extraordinarily common around other stars, yet our solar system has none. New solar-evolution modelling offers a dramatic possibility: the young Sun may have swallowed a rocky planet five to ten times Earth’s mass, leaving chemical and seismic fingerprints that could still be hidden inside it today.
21+ hour, 10+ min ago (1212+ words) Solar-evolution models favour engulfment of a compact world near 5.6 Earth masses, but the result is an indirect fit to helioseismic and chemical constraints rather than a detected lost planet....
Ganymede may hold more liquid water than all of Earth’s oceans combined, yet this immense reservoir is buried beneath roughly 150 kilometres of ice—and scientists still do not know whether any of it has ever reached the surface.
1+ week, 19+ hour ago (1634+ words) Magnetic and auroral evidence points to a vast ocean beneath Ganymede, but surface salts do not yet prove a direct connection through its roughly 150-kilometre ice shell. By Deep Field · Edited by Lachlan Brown Published September 5, 2026 · How we edit Ganymede…...
Every 97 days, a Neptune-sized world looms above Kepler-36b, spanning roughly 2.5 times the apparent diameter of our full Moon. At closest approach, its gravity raises enormous tides that could flex the rocky planet beneath it.
1+ week, 2+ day ago (758+ words) Kepler-36b and its Neptune-sized neighbour pass within about 1.9 million kilometres, creating a giant sky view and a powerful, changing tide across the rocky planet....
Saturn's rings look ancient, but data from the Cassini spacecraft suggests they are surprisingly young, likely no more than a few hundred million years old, meaning dinosaurs walked the Earth in a solar system where Saturn had no rings at all
1+ week, 4+ day ago (577+ words) A cosmic clock reset: Saturn's iconic rings may have formed after the dinosaurs vanished, rewriting what we thought we knew about the solar system's history....
Venus comes nearer to Earth than any other planet, yet averaged over time the closest planet to Earth is Mercury — and by the same arithmetic Mercury is also the closest planet to Neptune, because a body hugging the Sun can never wander far from anyone
1+ week, 5+ day ago (290+ words) The planet we think is closest to Earth isn't—and neither is any other planet what it seems when you average the numbers correctly....
Voyager 2 discovered ten moons when it flew past Uranus in 1986. Nearly 40 years later, James Webb found one it missed: Uranus's 29th known moon, a tiny world only about 10 kilometres wide hiding among the planet's inner moons.
3+ week, 1+ day ago (1080+ words) Webb's ten long infrared exposures found S/2025 U1 between Ophelia and Bianca, extending a moon census begun by Voyager 2 while exposing how much remains unresolved around Uranus....
A planet called WASP-127b, roughly 520 light-years from Earth, has a jet stream ripping around its equator at up to 33,000 km/h — more than 18 times faster than Neptune's winds, the fastest found anywhere in our own Solar System.
4+ week, 1+ day ago (1030+ words) Doppler-shifted water and carbon monoxide reveal record equatorial motion on the inflated giant exoplanet WASP-127b. By Deep Field · Edited by Lachlan Brown Published August 14, 2026 · How we edit Astronomers have measured atmospheric motion around the equator of WASP-127b at close to…...