News tagged with energy

Universe older than it looks

When astronomers (Bond 2013) first dated the star HD 140283, which lies a mere 190 lightyears from Earth in the constellation of Libra, they were puzzled. This rare, star appeared to be rather ancient and ...

Oct 27, 2014
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What is the geometry of the universe?

One of the big questions in cosmology regards the shape of the universe. "Shape" in this case is not the distribution of galaxies, but rather the shape of space and time itself. In general relativity, space ...

Sep 24, 2014
4.5 / 5 (54) 40

Building a better battery

Imagine an electric car with the range of a Tesla Model S - 265 miles - but at one-fifth the $70,000 price of the luxury sedan. Or a battery able to provide many times more energy than today's technology ...

Nov 25, 2014
4.2 / 5 (44) 32

How to make a "perfect" solar absorber

The key to creating a material that would be ideal for converting solar energy to heat is tuning the material's spectrum of absorption just right: It should absorb virtually all wavelengths of light that ...

Sep 29, 2014
4.8 / 5 (35) 3