Thursday, August 29, 2013

ScienceDaily: Astronomy News

ScienceDaily: Astronomy News

Space laser to prove increased broadband possible

Posted: 28 Aug 2013 06:11 PM PDT

Scientists are attemping to show two-way laser communication beyond Earth is possible, expanding the possibility of transmitting huge amounts of data. This new ability could one day allow for 3-D high definition video transmissions in deep space to become routine.

Milky Way gas cloud causes multiple images of distant quasar

Posted: 28 Aug 2013 02:31 PM PDT

For the first time, astronomers have seen the image of a distant quasar split into multiple images by the effects of a cloud of ionized gas in our own Milky Way Galaxy. Such events were predicted as early as 1970, but the first evidence for one now has come from the National Science Foundation's Very Long Baseline Array (VLBA) radio telescope system.

Modified law of gravity predicts dwarf galaxy feature prior to observations

Posted: 28 Aug 2013 07:34 AM PDT

MOND, a modified law of gravity, correctly predicted in advance of observations the velocity dispersion -- the average speed of stars within a galaxy relative to each other -- in 10 dwarf satellite galaxies of the Milky Way's giant neighbor Andromeda. MOND also detected subtle differences in gravity fields that dark matter theory says should be uniform.

Oldest solar twin identified: New clues to help solve lithium mystery

Posted: 28 Aug 2013 07:33 AM PDT

Astronomers have used ESO's Very Large Telescope to study the oldest solar twin known to date. Located 250 light-years away, the star HIP 102152 is more like the Sun than any other solar twin — except that it is nearly four billion years older. This older twin may be host to rocky planets and gives us an unprecedented chance to see how the Sun will look when it ages.
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