Planet ZEB

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milky way

10 Facts about the Milky Way

1. It is warped. The Milky Way is a disc about 120,000 light years across (see the Guide to Space post on the diameter of the Milky Way for more), with a central bulge that’s a diameter of 12,000 light years. As can be seen in the picture below the disc is far from totally […]

renwable energy sources

Sustainable energy sources

Sustainable energy sources are energy sources that are constantly replenished. These contain energy from the sun, water, wind, geothermal sources, and biomass sources for example energy crops. By comparison, fuels like petroleum, coal, and natural gas are non-replaceable. Both nonrenewable and sustainable energy sources are used to produce electricity, power vehicles, and supply cooling, heat, […]