The clusters of monster stars that lit up the early universe

The first stars in the Universe were born several hundred million years after the Big Bang, ending a period known as the cosmological 'dark ages' – when atoms of hydrogen and helium had formed, but nothing shone in visible ...

Are ultra-luminous galaxies colliding?

(Phys.org) —ltra-luminous infrared galaxies ((ULIRGs) are galaxies whose luminosity exceeds that of a trillion suns, By way of comparison, our Milky Way galaxy has a typical modest luminosity of only about ten billion suns. ...

LED streetlights best buy for cities, researchers report

University of Pittsburgh researchers have conducted the first cradle-to-grave assessment of light-emitting diode (LED) streetlights and determined that the increasingly popular lamps strike the best balance between brightness, ...

Astronomers observe the awakening of a Be/X-ray binary

Using ESA's XMM-Newton space telescope, astronomers have spotted bright X-ray outbursts emitted by a Be/X-ray binary known as A0538−66. The discovery marks the ending of an over three-decade-long period of quiescence of ...

First low-mass star detected in globular cluster

Even the most powerful high-tech telescopes are barely able to record remote low-mass and thus faint stars. Together with researchers from Poland and Chile, an astrophysicist from the University of Zurich has now detected ...

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