Einstein Telescope: a new-generation gravity wave detector

 
3r3-31. Longer, more powerful, more precisely - Europe is going to build a new generation of gravitational-wave detector called 3r3188. Einstein Telescope [/b] .
 
 
Einstein Telescope: a new-generation gravity wave detector  
Einstein Telescope concept art, credit: www.gwoptics.org
 
 
The AdvancedLIGO detector just started working a couple of years ago, and has not even reached its planned sensitivity yet. However, it is obvious to scientists that the sensitivity of LIGO will not be enough for real gravitational-wave astronomy.
 
 
I will talk about what limits LIGO, and how an underground cryogenic detector 2.5 times longer than LIGO can bypass these ...
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NASA Announces New Moon Flight

 
3r3-31. NASA Announces New Moon Flight 3r3108.  
3r3108.  
3r31-10. People will walk again on the surface of the moon - for the first time since 1972. The US National Aeronautics and Space Administration reported on plans for a new manned mission. So far, the super-specific details with dates have not been disclosed, the general message is simply "we will do it." 3r3111. 3r3108.  
3r31-10. American Internet 3r312. sobbing for joy
. But, unexpectedly, among the experts there were many dissatisfied. When NASA plans were announced before the advisory panel on November 1? the advisers split into two groups. On the one hand, proposals ...
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Online media predictably broke off about Oumuamua and Harvard scientists

 
3r3-31.
“Scientists do not hesitate to publish absurd ideas” 3–3–33. 3r361.  
Online media predictably broke off about Oumuamua and Harvard scientists 3r361.  
As an artist, he imagines a strangely shaped interstellar asteroid 1I /Oumuamua 3r361.  
3r361.  
A few days ago, 3r315 appeared on the network. preprint
a research paper intended for publication in the Astrophysical Journal. This paper describes an unusual object known as Oumamamoy , found at the end of 2017 - the first of the interstellar objects found in the solar system. 3r361.  
3r361.  
Scientists are still not sure what a strange-shaped cigar-shaped object is, and they were even more surprised to learn ...
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How can LIGO see gravitational waves, if in GRT the light is stretched along with the space?

3r33300. How can LIGO register gravitational waves if they stretch the light along with the space between the mirrors? 3r33333. 3r33333.  3r33490. How can LIGO see gravitational waves, if in GRT the light is stretched along with the space? Image credit: 3r3324. www.ligo.caltech.edu
[/i] 3r33333.  3r33490. 3r33333.  3r33490. This question certainly arises when there is a conversation about the detection of gravitational waves (GW). Usually the argument is as follows: we know that there is [leech=https://ru.wikipedia.org/wiki/%D0%93%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D0%BE%D0%B5_%D0%BA%D1%80%D0%B0%D1%81%D0%BD%D0%BE%D0%B5_%D1%81%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D0%B5] ...
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Japanese weeks in the asteroid belt

 
3r3-31. Japanese weeks in the asteroid belt 3r3188.  
3r3188.  
In the coming months, asteroids will be particularly relevant. No, they will not fall on Earth. The earth will fall upon them. More precisely, terrestrial products will consider them from close range, descend to the surface, grab, shoot and bomb. The first revenge for Chelyabinsk is taken by the Japanese. 3r3188.  
pile of rubble ". This is a very loose cosmic body formed from small and large stones, connected by gravity and Van-der-Waals forces (the forces of weak electromagnetic interaction at the molecular level, thanks to them, for example, geckos can crawl on glass)...
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A new hunt for dark matter takes place under the mountain

 3r3309. 3r3-31.
David D’Angelo was not always interested in dark matter, but now he is on the cutting edge of the hunt for the most elusive particle in the Universe 3r-33r33.
 3r3309. A new hunt for dark matter takes place under the mountain  3r3309.
 3r3309. About an hour from Rome, there is a dense cluster of mountains called 3r311. Gran Sasso d'Italia 3-333297. . They are known for their natural beauty and attract tourists all year round, offering world-class ski resorts and hiking trails in the winter, as well as the opportunity to swim in the summer. For the 43-year-old Italian physicist David D’Angelo, these mountains are like a second home. Unlike most ...
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Topo-genetic nature of matter in 10 comments

Topological-genetic nature of matter
 
(in ten comments)


 
 
The evolution of the universe is a matter of questions. In this work we are talking about a deep science, in which objective reality and the features of cognition are correlated. It is shown how much the scientists' views, the stereotypes and the language of science are able to represent the sources and mechanisms of the transformation of matter physically and conceptually. The author substantiates an alternative topological and genetic concept of the formation of matter, the foundation of which is a topological environment capable ...[/h]
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The descent stations of the Hayabusa 2 mission successfully landed on the surface of the asteroid 1999 JU3

The descent stations of the Hayabusa 2 mission successfully landed on the surface of the asteroid 1999 JU3  
The photo received by the rover 1B on September 21 this year. The picture was taken immediately after the module was separated from the station.
 
 
On Habr several times wrote about the Japanese mission to study asteroids "Hayabusa 2". The purpose of this mission is a survey of a specific asteroid, 1999 JU? which was opened on May 1? 199? as part of the LINEAR project, staff of the Socorro Observatory. To implement the mission, a probe was developed, which was created by the specialists of the Japan Aerospace Exploration Agency (JAXA).
 
 
As you can already understand by the name of the mission...
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NASA knows how to make Mars green again

NASA knows how to make Mars green again  
 
With an artificial magnetic field, the atmosphere of Mars and liquid surface waters can be restored. And we can hope that life will return to Mars after the launch of the magnetic field. NASA
 
 
NASA is thinking about launching an artificial magnetic field near Mars to help create an atmosphere that will help Mars maintain life. With a magnetic field, Mars can have an atmosphere of half the Earth's atmospheric pressure for several years, and perhaps we will migrate to Mars much earlier than we planned.
...
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What is the importance of ??? = ??? + 1? How to explain it on the fingers?

The author of the answer to Quora is Michael Griffin, postdoc on mathematics
 
 
What is the importance of ??? = ??? + 1? How to explain it on the fingers? Senia Scheidwasser gave very good, simple answer to this question, I recommend reading this brief version. But there is a much more surprising story of the Monstrous Moonshine hypothesis mixed with McKay's equation: from Jack Daniel's whiskey to black holes and quantum gravity.
 
 
In this story, symmetries and mathematical "groups" are often mentioned, so let's start with what is meant by the group in mathematics. A group can be represented as a way to reorder a set of objects, preserving a certain structure. The operations ...
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