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Brown dwarf stars – Space science

By |2018-05-31T11:49:30+00:00August 17th, 2017|Physics|

What a brown dwarf might look like up close The very beginning of a star forming is a brown dwarf: a star that hasn't gotten enough mass together yet to begin nuclear fusion. They are the smallest and coolest kind of star. Brown dwarfs aren't really brown, but they are a very dull red color. They hardly [...]

What is uranium? Atoms, elements, chemistry

By |2018-04-16T23:49:23+00:00June 2nd, 2017|Chemistry, Physics|

Diagram of a uranium atom Uranium is a rare atom, not just on Earth but also in space and on other planets. There is not very much uranium anywhere. That's because, like lead or gold, uranium only forms inside exploding supernovas. Because uranium atoms have so many protons and neutrons in them, they don't [...]

What is heat? Simple science – Chemistry

By |2018-05-08T09:27:54+00:00June 2nd, 2017|Chemistry, Physics|

What is heat? A big campfire throws some serious heat Definition of heat When molecules of any kind of atoms get more energy in them than they had before, they move faster, and we call that "heat". When the molecules move faster, they hit against each other and bounce apart, and so they [...]