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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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News
Known physics suggests the early universe should have produced matter and antimatter in equal amounts. Nearly all of it annihilated into radiation, but roughly one extra matter particle survived for every billion pairs—and why that tiny imbalance existed remains one of physics’ deepest unsolved problems.
4+ hour, 28+ min ago (906+ words) The measured net baryon-to-photon ratio is about 6.1 parts in ten billion. Physics can describe the required ingredients for that excess, but no confirmed mechanism made it....
Physicist Bhupal Dev at Washington University used the debris from GW170817 — the 2017 neutron star merger — to squeeze new limits on axion-like particles, treating the hot post-collision remnant as a natural forge for dark-matter candidates
3+ day, 17+ hour ago (302+ words) Physicist Bhupal Dev and colleagues have used the multi-year record of GW170817 — the 2017 neutron star merger seen in both gravitational waves and light — to tighten bounds on axion-like particles, treating the hot post-collision remnant as a natural forge for dark matter…...
The universe’s total mass-energy budget, according to standard cosmology: 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy — meaning everything made from the atoms on the periodic table accounts for less than one-twentieth of the cosmos.
2+ week, 4+ hour ago (1022+ words) Planck's 2013 universe inventory assigned 4.9% to ordinary matter, 26.8% to dark matter and 68.3% to dark energy, within the standard flat ΛCDM model....
Inside droplets of molten platinum, researchers found atoms pinned motionless even at extreme temperatures — and when enough formed a ring, they blocked crystallisation and kept the metal liquid more than 1,000°C below platinum’s normal melting point.
2+ week, 8+ hour ago (434+ words) In 3-to-6-nanometre platinum droplets on graphene, stationary edge atoms raised the crystallisation barrier and steered cooling metal toward an amorphous solid instead of a crystal....
Physics says a spacecraft with mass can never reach the speed of light: as it accelerates closer to c, the energy required rises without limit, so light speed isn't merely difficult to reach — for massive objects, it's physically unattainable.
3+ week, 5+ hour ago (1175+ words) Special relativity allows a massive spacecraft to approach light speed but makes the required energy diverge as velocity approaches c. By Space Daily Editorial Team · Edited by Lachlan Brown Published August 23, 2026 · How we edit A powerful enough engine can make a…...