The discovery of active galactic nuclei has allowed astronomers to group together several different classes of galaxies. It’s also allowed astronomers to understand how a galaxy’s size can be discerned by the behavior at its core. And last, it has also helped astronomers to understand which g...
ACTIVE galactic nucleiGALACTIC X-ray sourcesGALAXY spectraSPECTRAL energy distributionAims. Radio-loud narrow-line type 1 galaxies provide us with a fresh look at the blazar phenomenon, the causes of radio loudness, and the physics of jet formation. We present a ...
We compare the near- and mid-IR characteristics of these ultraluminous galaxies to ISO and literature data of 30 starburst and active galactic nuclei (AGN) template galaxies. We find the following: 1. Of the ultraluminous IRAS galaxies in our sample, 70%-80% are predominantly powered by ...
The associated FIR emission in B6 and B7 and high star formation rates strongly favor star formation in galaxies as an important powering source for the lyman alpha emission in both LABs. However, the other two, B1 and B5, are predominantly driven by the active galactic nuclei or other ...
Astronomers have peered into the heart of a nearby starburst galaxy to better understand what powers its intense bouts of star formation. "All stars form in dense clouds of dust and gas," Adam Leroy, formerly of the National Radio Astronomy Observatory in Virginia and now with Ohio State ...
However, he seriously doubted that there were humanoid life forms in other galaxies. Hawking said that it would be highly unlikely that life-supporting planets elsewhere would mirror lifeforms on Earth to such an extent. He blamed this on our failure to broaden our imagination when it comes to...
Space debris that is large enough can be monitored, and active satellites can be moved out of the way. However, some pieces are too small that cannot be, such as paint specs, and it is hoped that they do not come into contact with satellites but burn up on re-entry. It is ...
There is not enough matter in galaxies to account for their motion. So what did the physicists do? They hypothesized two ad hoc mechanisms, “dark matter” and “dark energy” to explain the missing mass. They still haven’t had success in trying to find evidence for these elusive concepts...
With all my enthusiasm for humanity's future in space, there's one glaring problem. We're soft meat bags of mostly water, and those other stars are really really far away. Even with the most optimistic spaceflight technologies we can imagine, we're never
Dear Lord, I know that I am talking and that no one can hear me, so I suppose I understand a little bit what it has been like to be You. So in this pause, which is not of my own making but of the little hamsters who run in the wheel that powers the internet as they need a...