Tag Archives: galaxies

What happens when galaxies collide: Hubble showcases six mergers

To celebrate a new year, the NASA/ESA Space Telescope has published a montage of six beautiful galaxy mergers. Each of these merging systems was studied as part of the recent HiPEEC survey to investigate the rate of new star formation within such systems. These interactions are a key aspect of galaxy evolution and are among the most spectacular events in the lifetime of a galaxy. CREDIT ESA/Hubble, NASA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University), A. Adamo et al.

It is during rare merging events that galaxies undergo dramatic changes in their appearance and in their stellar content. These systems are excellent laboratories to trace the formation of star clusters under extreme physical conditions. The Milky Way typically forms star clusters with masses that are 10 thousand times the mass of our Sun. This doesn’t compare to the masses ...

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Universe is Expanding Faster Than Previously Thought, Says NASA’s Hubble Team

Astronomers from NASA found that the Universe is expanding faster than they previously thought. Here is the illustration showing 3 steps they used to measure the universe's expansion rate to an unprecedented accuracy, reducing the total uncertainty to 2.4 percent. (NASA, ESA, A. FEILD (STSCI), AND A. RIESS (STSCI/JHU)

NASA’s Hubble Space Telescope team of scientists from NASA have discovered that the universe is expanding 5 percent to 9 percent faster than previously thought. “This surprising finding may be an important clue to understanding those mysterious parts of the universe that make up 95 percent of everything and don’t emit light, such as dark energy, dark matter, and dark ...

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Indian-Origin Astronomer Develops Unique Galacto-Seismic Method to Hunt Dark Matter Galaxies

Based on galactoseismology, Indian origin astronomer Sukanya Chakrabarti, former post-doc at Berkeley and her mentor Leo Blitz have found three bright pulsating stars on the periphery of the Milky Way galaxy which could be beacons from a dwarf, dark matter galaxy. Using supercomputer simulation of the collision of a dwarf and dark-matter galaxy over the course of the last billion ...

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Capturing and Sorting thickets of stars in galaxies far, far away

A Yale University astronomer has helped untangle the cosmic knots of stars at the center of giant, elliptical galaxies. Two studies, one led by Yale’s Grant Tremblay and other led by Michigan State University researcher Megan Donahue, are providing new information about why the universe’s largest elliptical galaxies ratchet down their star production despite having plenty of available star-making material. ...

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