SETI has listened to KIC 8462852 for two kinds of signals and found nothing stronger than an intensity of 100 Jy (Jansky). They looked for purposefully broadcast narrow band signals and a wide band omnidirectional signal not purposefully sent.  Their first observational pass lasting two weeks found , in their words, "To summarize these observations, we estimate an upper limit for anomalous flux from KIC 8462852 to be 100 Jy in a 100 kHz band over the frequencies displayed." 1  Put another way either no one is transmitting, or no one there is transmitting anything strong enough for us to detect at the distance KIC8462852 is from us (about 1500 light years).  

Weather patterns in a mysterious world beyond our solar system called
PSO J318.5-22
have been revealed for the first time. Layers of clouds, made up of hot dust and droplets of molten iron, have been detected on a planet-like object found 75 light years from Earth, researchers say. 

Findings from the study could improve scientists' ability to find out if conditions in far-off planets are capable of sustaining life, the team of astronomers suggests.

They used a telescope in increasingly-popular Chile (Hawaii and Arizona in the U.S. long ago declared white-collar astronomy and a mandated lack of light pollution to be environmentally hazardous) to study the weather systems in PSO J318.5-22, which is estimated to be around 20 million-years-old. 

I got many comments on last week's Nibiru article from some very scared people. They needed a lot of reassuring that it was indeed a hoax and not real, and brought up many topics to discuss such as lens flares, hoaxes, double sun videos, rare sun mirages, and the status of the astronomical search for various versions of planet X. Why are astronomers so sure that Nibiru is nonsense?

Astronomers have discovered an adolescent protostar that is undergoing a rapid-fire succession of growth spurts. Evidence for this fitful youth is seen in a pair of intermittent jets streaming away from the star's poles.

Known as CARMA-7, the protostar is one of dozens of similar objects in the Serpens South star cluster, which is located approximately 1,400 light-years from Earth. This clutch of nascent stellar objects was first detected by and named for the Combined Array for Research in Millimeter-wave Astronomy (CARMA) telescope.

In the film version of "The Martian", the main character is trapped on the red planet and is forced to figure out how to grow food. He declares he is going to "science the s--t out of" the issue before instead engaging in regular old agriculture mixed with some engineering.

But science may soon help, researchers have discovered a gene that could open the door for space-based food production. Professor Peter Waterhouse, a plant geneticist at QUT, discovered the gene in the ancient Australian native tobacco plant Nicotiana benthamiana, known as Pitjuri to indigenous Aboriginals tribes, which has been used for decades as a model plant upon which to test viruses and vaccines.

Science fiction stories often suggest that ETs, and our future selves also, would be expansionist, colonizing the galaxy, taking over worlds, and so forth. It's natural enough, because we are expansionist ourselves. But it's actually quite easy to see that ETs simply can't have expanding populations, at least not for very long. Not if they are anything like us. 

It's a simple calculation which I covered before. If their doubling time is once a century, say (for  ease of calculation) - then in a thousand years, their population multiples by a little over a thousand (two to the power ten). So after two thousand years it has multiplied by a million, by a billion after three thousand years and so on.

Sorry, I accidentally made two copies of this article with different titles. And both have comments, so not sure what to do.

Unless you want to read the comments here, please visit the newer copy, Why ETs Won't Need to Colonize or Expand.

Jupiter's moon Europa is believed to possess a large salty ocean beneath its icy exterior, and that ocean, scientists say, has the potential to harbor life. Indeed, a mission recently suggested by NASA would visit the icy moon's surface to search for compounds that might be indicative of life. But where is the best place to look? New research by Caltech graduate student Patrick Fischer; Mike Brown, the Richard and Barbara Rosenberg Professor and Professor of Planetary Astronomy; and Kevin Hand, an astrobiologist and planetary scientist at JPL, suggests that it might be within the scarred, jumbled areas that make up Europa's so-called "chaos terrain."

Scientists have predicted a new phase of superionic ice, a special form of ice that could exist on Uranus and Neptune, thanks to a computer solution performed by a team of researchers at Princeton University. 

Durable crystals called zircons are used to date some of the earliest and most dramatic cataclysms of the solar system. One is the super-duty collision that ejected material from Earth to form the moon roughly 50 million years after Earth formed. Another is the late heavy bombardment, a wave of impacts that may have created hellish surface conditions on the young Earth, about 4 billion years ago.

Both events are accepted but unproven and the dates were estimated from zircons retrieved from the moon during NASA's Apollo voyages in the 1970s.