News tagged with galaxy evolution

Stellar winds

(PhysOrg.com) -- The Sun, glowing with a surface temperature of about 5500 degrees Celsius, warms the Earth with its salutary light. Meanwhile the Sun's hot outer layer (the corona), with its temperature of ...

Oct 10, 2011
5 / 5 (2) 7 | with audio podcast

Small distant galaxies host supermassive black holes

(PhysOrg.com) -- Using the Hubble Space Telescope to probe the distant universe, astronomers have found supermassive black holes growing in surprisingly small galaxies. The findings suggest that central black ...

Sep 15, 2011
4.2 / 5 (10) 28 | with audio podcast

A cosmic exclamation point

(PhysOrg.com) -- VV 340, also known as Arp 302, provides a textbook example of colliding galaxies seen in the early stages of their interaction. The edge-on galaxy near the top of the image is VV 340 North ...

Aug 12, 2011
4.3 / 5 (8) 42 | with audio podcast

Galaxy Evolution Explorer finds dark energy repulsive

(PhysOrg.com) -- A five-year survey of 200,000 galaxies, stretching back seven billion years in cosmic time, has led to one of the best independent confirmations that dark energy is driving our universe apart at a ...

May 20, 2011
4.3 / 5 (9) 8

Raging storms sweep away galactic gas

(PhysOrg.com) -- ESA's Herschel infrared space observatory has detected raging winds of molecular gas streaming away from galaxies. Suspected for years, these outflows may have the power to strip galaxies ...

May 09, 2011
4 / 5 (4) 7 | with audio podcast

Large galaxies stopped growing 7 billion years ago

(PhysOrg.com) -- Galaxies are thought to develop by the gravitational attraction between and merger of smaller 'sub-galaxies', a process that standard cosmological ideas suggest should be ongoing. But new ...

Apr 20, 2011
4.9 / 5 (7) 4 | with audio podcast