The recipe for powerful quasar jets
Some supermassive black holes launch powerful beams of material, or jets, while others do not. Astronomers may now have identified why.
Astronomy
Oct 15, 2020
2
211
News tagged with ultraviolet rays
A new look at sunspots
NASA's extensive fleet of spacecraft allows scientists to study the Sun extremely close-up—one of the agency's spacecraft is even on its way to fly through the Sun's outer atmosphere. But sometimes taking a step back can ...
Space Exploration
Oct 9, 2020
3
393
A universe with oligarchs: Era of reionization likely the work of the most massive, luminous galaxies
The sparsely distributed hot gas found today between galaxies, the intergalactic medium (IGM), is ionized. The early universe started off hot, but then it rapidly expanded and cooled allowing its main constituent, hydrogen, ...
Astronomy
Apr 27, 2020
2
186
Invisible X-rays turn blue
A new reaction system can detect X-rays at the highest sensitivity ever recorded by using organic molecules. The system, developed by researchers at Nara Institute of Science and Technology (NAIST), Ikoma, Japan; and Centre ...
Materials Science
Feb 7, 2020
0
8
Researchers investigate ultrafast reaction of superfluid helium triggered by extreme ultraviolet laser pulses
A team headed by Professor Frank Stienkemeier at Freiburg's Institute of Physics and Dr. Marcel Mudrich, professor at the University of Aarhus in Denmark, has observed the ultrafast reaction of nanodroplets of helium after ...
Quantum Physics
Jan 8, 2020
0
19
ISS sensors show terrestrial gamma-ray flash and ionospheric UV emissions spurred by lightning
A team of researchers from Denmark, Norway, Spain and Italy has found that both terrestrial gamma-ray flashes and ionospheric ultraviolet emissions are spurred by lightning. In their paper published in the journal Science, ...
What happens when you explode a chemical bond?
On bright summer days, the sunlight all around us is breaking bad by breaking bonds. Chemical bonds.
Materials Science
Jul 11, 2019
0
477
Catching fast changes in excited molecules
It's hard to see certain molecules react. The reaction is just that fast. Until now. A team of scientists devised a way to reveal time- and energy-resolved information on "dark" states of molecules—ones that are normally ...
Optics & Photonics
Apr 10, 2019
0
9
What ionized the universe?
The sparsely distributed hot gas that exists in the space between galaxies, the intergalactic medium, is ionized. The question is, how? Astronomers know that once the early universe expanded and cooled enough, hydrogen (its ...
Astronomy
Mar 25, 2019
93
393
Active galaxies point to new physics of cosmic expansion
Investigating the history of our cosmos with a large sample of distant 'active' galaxies observed by ESA's XMM-Newton, a team of astronomers found there might be more to the early expansion of the universe than predicted ...
Astronomy
Jan 29, 2019
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