If extraterrestrial civilizations were sending probes by Earth similar to our plans for Breakthrough Starshot (where the probes are only a few meters in diameter and will be moving at up to 0.2c when
The latest big quasar find at ~12.8 bn LJ with an estimated mass of 12 bn M☉ (see e.g. http://www.newscientist.com/article/mg22530104.000-ancient-black-hole-had-an-inexplicable-growth-spurt.html) p…
Vi mäter en stjärns relativa hastighet mot eller bort från oss via dess dopplerförskjutna spektrum. Så här mäter vi avståndet från mycket avlägsna stjärnor: mätning av skift i spektrumet ...
Comets are mostly icy but they should have some rocky components too, right? I wonder if there's any rocky piece of a former comet among collected meteorites. Is it possible today to identify a met…
What happens when a huge star in its later stage( iron core) is near a black hole that slowly consumes some of the matter from the star? Would this offset the imbalance caused by iron fusion prolon…
Jag letar efter en formell förklaring av följande stjärndatabasformat: Akamar, f | S | A3,02: 58: 15.696 | -44.6, -40: 18: 16.97 | 19.0,3.2,2000,0 Menkar, f | S | M2,3: 02: 16.8 | -11.81,4: 05: 24 | -78.76,2.54,2000,0
