Sentences with phrase «production by galaxies»
The all - sky infrared survey should also map out the history of light production by galaxies and — closer to home — the distribution of ices in embryonic planetary systems.
http://www.sciencemag.org/ Not exact matches
In fact, production rates have steadily declined from a maximally productive period between 3 and 6 billion years after the Big Bang, when galaxies formed about 10 times as many stars (going by the total mass of the stars created) each year than today.
We propose that the cycle may be caused by modulation of cosmic ray (CR) flux by the Solar system vertical oscillation (64 My period) in the galaxy, the galactic north - south anisotropy of CR production in the galactic halo / wind / termination shock (due to the galactic motion toward the Virgo cluster), and the shielding by galactic magnetic fields.