NASA's James Webb Space Telescope successfully finishing tensioning its massive sunshield on Tuesday, marking a critical step in the powerful observatory's zero-gravity deployment.
NASA's James Webb Space Telescope is waiting at its launch site, after years of repeated delays and cost overruns. At one point, the giant new observatory was threatened with cancellation.
The upcoming launch of NASA's powerful James Webb Space Telescope should let astronomers see what some of the universe's first stars and galaxies looked like soon after the Big Bang.
The cosmic sinkhole is at the center of a galaxy 800 million light-years from Earth and supports the theory that such objects can switch their power output on and off in relatively short time-scales.
Just as two kids jumping on a trampoline around each other send waves rippling outwards on the fabric, black holes distort space as they orbit around each other, says astrophysicist Marcelo Gleiser.
Cosmic expansion stretches space itself, as if space were made of some kind of stretchy rubber material; there is no physical border, only stretching space, says astrophysicist Marcelo Gleiser.
A black hole with about 17 billion times the mass of our sun has turned up in another remote galaxy. Astronomers now think these mass-eating monsters may not be so rare after all.
Looking from Earth, it's in an area just above where the handle of the Big Dipper meets its cup — or, if you prefer, it's just above Ursa Major's rump.
A team in England looked at thousands of galaxies that had stopped forming stars and determined that the vast majority of them showed signs that their stellar fuel supply had been choked off.
A new glimpse of what the universe looked like in its youth has been captured. Researchers say light from galaxy EGS-zs8-1 has spent the past 13 billion years traveling to Earth.
Amid this week's hoopla celebrating the Hubble Space Telescope, don't forget the clever astronomer for whom the space scope was named. In the 1920s, he changed our sense of ourselves and the universe.
Launched shortly after the fall of the Berlin Wall, the Hubble telescope isn't showing its age. Astronomers and other fans hope this old charmer will be useful for many years to come.
Scientists call them "fast radio bursts," or FRBs: mysterious pulses of radio waves coming from far, far away. Researchers in Australia say they've observed one in real time.
