Starsglaxiesspace - SPACE

“More Giant Galaxies Discovered in the Early Universe”

 Astronomers using the Atacama Large Millimeter/millimeter Array (ALMA) in Chile have discovered two giant galaxies that existed when the universe was only 780 million years old, or about 5 percent of its current age. These two galaxies, known collectively as SPTO311-58, appear to be within an even-more-massive dark matter halo, containing several trillion times the mass of our sun.  This discovery is quite surprising for scientists. Like how suns and planets are formed from clumps of gas and rock sticking together, astronomers expected the first galaxies to resemble little dwarf galaxies such as those seen today. Yet, nature has surprised everybody, revealing examples of massive galaxies - even for today’s standards.  The researchers wrote the following statement: “This ‘de-lensing’ process provided intriguing details about the galaxies, showing that the larger of the two is forming stars at a rate of 2,900 solar masses per year. It also contains about 270 billion times the mass of our sun in gas and nearly 3 billion times the mass of our sun in dust.” This shows that these galaxies very likely merged to eventually form the largest galaxy ever observed at that time period in cosmic history.

Read more about this fascinating story at: http://earthsky.org/space/primordial-galaxies-spt0311-58-dark-matter-early-universe

Images: Artist’s concept via NRAO/ AUI/ NSF; D. Berry. & Composite Image via ALMA (ESO/NAOJ/NRAO), Marrone, et al.; B. Saxton (NRAO/AUI/NSF); NASA/ESA Hubble.

Jupiter’s surface

Rosetta: “Comet from 8km”

Description A section of the smaller of Comet 67P/Churyumov–Gerasimenko’s two lobes as seen through Rosetta’s narrow-angle camera from a distance of about 8 km to the surface on 14 October 2014. The resolution is 15 cm/pixel. The image is featured on the cover of 23 January 2015 issue of the journal Science. More information: Getting to know Rosetta’s comet

Credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA