Here are 60 facts about popular K-pop band BTS and its members, RM, Jin, Suga, J-Hope, Jimin, V, and Jungkook.
Vega is only about 400 million years old – which is fairly young. It is an A-type star and has about twice the mass of the Sun. It will not live as long as the Sun does because Vega will exhaust its nuclear fuel much sooner. Betelgeuse (αOrionis) People often ask which stars wi...
Gadolinium has the highest thermal neutron cross-section of all the elements. Gadolinium is used in nuclear reactor control rods to regular fission. The element is injected intoMRI patientsto increase image contrast. Other uses of gadolinium include the manufacture of certain iron and chromium alloys...
My own journey into Silverland has begun in 1999, without any knowledge of facts presented in the previous section, and it was quite unexpected for myself. Being brought up initially as a spectroscopist, and having defended my PhD thesis in surface-enhanced Raman spectroscopy in 1998, I was ...
The universe is more than 13.7 billion years old and it is home to billions of galaxies. No one is quite sure exactly how many galaxies there are all told, but some of the facts we do know are pretty impressive. How do we know what we know about galaxies? Astronomers study the light...
Sometimes a hypothesis which challenges convention can be alluring, particularly when it could plausibly fit most of the facts. But all of the evidence presented by Illig and his group (mostly written in German) is circumstantial at best. Their hypothesis does raise some interesting questions and ...
isotope of uranium (uranium-238) with neutrons. Any uranium atoms which happen to absorb a neutron briefly become uranium-239, an unstable element which rapidly decays into neptunium-239. Having a half-life of only 2.355 days, this element also soon decays, resulting in the desired plutonium...
Neutron radiation is the one to worry about if acquiring radioactivity is your concern; the balance of neutrons in an atom’s nucleus is the factor that determines radioactivity. Too many or too few neutrons will render an atom radioactive. For example, carbon is stable with 6 or 7 neutrons...