How big is the black hole in the center of that galaxy? Just look at its spiral arms for clues! Some spiral galaxies have arms that are wound up like a tight spring. In others, the arms curl loosely, like a pinwheel.
Read on Nasa ↗The US' First Digital Nuclear Reactor Is Carrying Out 'First-Of-A-Kind Experiments' As an energy source that does not utilize fossil fuels and produces no direct carbon emissions once operational, nuclear energy is…
Read moreMark Rober has spent years proving that science and engineering don’t have to feel like homework. His enormously popular videos turn subjects such as physics, robotics, and mechanical engineering into spectacular…
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