Simulations reveal an unusual death for ancient stars

(Phys.org) —Certain primordial stars—those 55,000 and 56,000 times the mass of our Sun, or solar masses—may have died unusually. In death, these objects—among the Universe's first-generation of stars—would ...

Sep 29, 2014
4.9 / 5 (31) 9

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
4.7 / 5 (31) 2

How small can galaxies be?

Yesterday I talked about just how small a star can be, so today let's explore just how small a galaxy can be. Our Milky Way galaxy is about 100,000 light years across, and contains about 200 billion stars. Th ...

Sep 29, 2014
4.9 / 5 (16) 20

Cold atom laboratory chills atoms to new lows

(Phys.org) —NASA's Cold Atom Laboratory (CAL) mission has succeeded in producing a state of matter known as a Bose-Einstein condensate, a key breakthrough for the instrument leading up to its debut on the ...

Sep 29, 2014
4.7 / 5 (14) 0

Dolphins are attracted to magnets

Dolphins are indeed sensitive to magnetic stimuli, as they behave differently when swimming near magnetized objects. So says Dorothee Kremers and her colleagues at Ethos unit of the Université de Rennes ...

23 hours ago
4.9 / 5 (13) 2

Japan's volcanoes: Could Fuji be next?

The sudden eruption of Mount Ontake over the weekend, which is believed to have killed at least 31 people, was a reminder of Japan's vulnerability to its many active volcanoes.

17 hours ago
4.9 / 5 (13) 1