Chandra Gives Us the Elementary Nature of Cassiopeia A

❝ Where do most of the elements essential for life on Earth come from? The answer: inside the furnaces of stars and the explosions that mark the end of some stars’ lives.

❝ X-ray telescopes such as Chandra are important to study supernova remnants and the elements they produce because these events generate extremely high temperatures — millions of degrees — even thousands of years after the explosion. This means that many supernova remnants, including Cas A, glow most strongly at X-ray wavelengths that are undetectable with other types of telescopes.

Old King Coal doesn’t stand a chance

❝ Despite plummeting wholesale electricity prices in some areas of the US as well as essentially flat electricity demand in recent years, natural gas and renewable capacity is still being built…

❝ In 2016, the Energy Information Agency notes, natural gas-fired electric generation in the US increased by 3.4 percent; non-hydroelectric renewables like wind, solar, biomass, and geothermal increased by 15.7 percent; and conventional hydroelectric power grew by 7.5 percent. Coal electric generation, on the other hand, fell by 8.4 percent in 2016.

RTFA for details. Still, unless you believe the rant of fools like Trump, you shouldn’t be surprised.