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So stärken Sie Ihr Immunsystem im Alltag | Von Kopf bis Fuss
Bewegen, Sonne tanken oder richtig schlafen: 7 Tipps für mehr natürliche Gesundheit.
health  sun  sleep  tipps  howto  lifehacks  natural  tagi  2020  immune_system 
12 days ago by navegador
Twitter
RT : Have you met , our new exciting mission to investigate the up close?
🛰️☀️

Check out our interact…
Sun  SolarOrbiter  from twitter_favs
14 days ago by minoguchi
Sinister sunrise captured by photographer Elias Chasiotis during an eclipse in Qatar – Colossal
The haze gave the sun its red glow, but as NASA astronomer explained on the Astronomy Picture of the Day blog, the Earth’s atmosphere helped create the full image: “The dark circle near the top of the atmospherically-reddened Sun is the Moon — but so is the dark peak just below it. This is because along the way, the Earth’s atmosphere had an inversion layer of unusually warm air which acted like a gigantic lens and created a second image.”
photography  sun  eclipse 
23 days ago by terry
This is the highest-resolution photo of the sun ever taken – MIT Technology Review
Each of the "cells" on the surface of the sun are roughly the size of Texas. The resolution of DKIST is about 18.5 miles.
space  sun  astronomy 
24 days ago by terry
Sun's surface seen in remarkable new detail – BBC News
This is remarkable when set against the scale of our star, which has a diameter of about 1.4 million km (870,000 miles) and is 149 million km from Earth. The cell-like structures are roughly the size of the US state of Texas. They are convecting masses of hot, excited gas, or plasma.
sun  space  astronomy 
25 days ago by terry
News - SPIKED AT FORBES: Global Warming? An Israeli Astrophysicist Provides Alternative View That Is Not Easy To Reject | Heartland Institute
In a modest office on the campus of Jerusalem’s Hebrew University, an Israeli astrophysicist patiently explains why he is convinced that the near-unanimous judgments of climatologists are misguided. Nir Shaviv, chairman of the university’s physics department, says that his research and that of colleagues, suggests that rising CO2 levels, while hardly insignificant, play only a minor role compared to the influence of the sun and cosmic radiation on the earth’s climate.

“Global warming clearly is a problem, though not in the catastrophic terms of Al Gore’s movies or environmental alarmists,” said Shaviv. “Climate change has existed forever and is unlikely to go away. But CO2 emissions don’t play the major role. Periodic solar activity does.”

“Only people who don’t understand science take the 97% statistic seriously,” he said. “Survey results depend on who you ask, who answers and how the questions are worded. In any case, science is not a democracy. Even if 100% of scientists believe something, one person with good evidence can still be right.”

History is replete with lone voices toppling scientific orthodoxies. Astronomers deemed Pluto the ninth planet – until they changed their minds. Geologists once regarded tectonic plate theory, the movement of continents, as nonsense. Medicine were 100% certain that stomach resulted from stress and spicy food, until an Australian researcher proved bacteria the culprit and won a Nobel Prize for his efforts.

Lest anyone dismiss Shaviv on the basis of his scientific credentials or supposed political agenda, consider the following: He enrolled at Israel’s Technion University – the country’s equivalent of MIT – at the age of 13 and earned an MA while serving in the Israel Defense Force’s celebrated 8200 Intelligence unit. He returned to Technion, where he earned his doctorate, afterward completing post-doctoral work at California Institute of Technology and the Canadian Institute for Theoretical Astrophysics. He also has been an Einstein Fellow at The Institute for Advanced Study in Princeton.

In other words, he knows tons more about science than Donald Trump or Al Gore.

In 2003, Shaviv and research partner Prof. Jan Veizer published a paper on the subject of climate sensitivity, namely how much the earth’s average temperature would be expected to change if the amount of CO2 in the atmosphere is doubled. Comparing geological records and temperature, the team came up with a projected change of 1.0 to 1.5 degrees Celsius – much less than the 1.5 to 4.5 degree change the IPCC has used since it began issuing its reports. The reason for the much wider variation used by the IPCC, he said, was that they relied almost entirely on simulations and no one knew how to quantify the effect of clouds – which affects how much radiant energy reaches the earth – and other factors.

“Since then, literally billions have been spent on climate research,” he said. Yet “the conventional wisdom hasn’t changed. The proponents of man-made climate change still ignore the effect of the sun on the earth’s climate, which overturns our understanding of twentieth-century climate change.”
He explained: “Solar activity varies over time. A major variation is roughly eleven years or more, which clearly affects climate. This principle has been generally known – but in 2008 I was able to quantify it by using sea level data. When the sun is more active, there is a rise in sea level here on earth. Higher temperature makes water expand. When the sun is less active, temperature goes down and the sea level falls – the correlation is as clear as day.

“Based on the increase of solar activity during the twentieth century, it should account for between half to two-thirds of all climate change,” he said. “That, in turn, implies that climate sensitivity to CO2 should be about 1.0 degree when the amount of CO2 doubles.”

The link between solar activity and the heating and cooling of the earth is indirect, he explained. Cosmic rays entering the earth’s atmosphere from the explosive death of massive stars across the universe play a significant role in the formation of so-called cloud condensation nuclei needed for the formation of clouds. When the sun is more active, solar wind reduces the rate of cosmic rays entering the atmosphere. A more active solar wind leads to fewer cloud formation nuclei, producing clouds that are less white and less reflective, thus warming the earth.

“Today we can demonstrate and prove the sun’s effect on climate based on a wide range of evidence, from fossils that are hundreds of millions of years old to buoy readings to satellite altimetry data from the past few decades,” he said. “We also can reproduce and mimic atmospheric conditions in the laboratory to confirm the evidence.

"All of it shows the same thing, the bulk of climate change is caused by the sun via its impact on atmospheric charge,” he said. “Which means that most of the warming comes from nature, whereas a doubling of the amount of CO2 raises temperature by only 1.0 to 1.5 degrees. A freshman physics student can see this.”

..“Global warming is not a purely scientific issue any more,” he said. “It has repercussions for society. It has also taken on a moralistic, almost religious quality. If you believe what everyone believes, you are a good person. If you don’t, you are a bad person. Who wants to be a sinner?”
astronomy  climate-change  solar  sun  science  sea-ice 
4 weeks ago by whatithunk
User identifier - Wikipedia
Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs. UIDs are stored in the inodes of the Unix file system, running processes, tar archives, and the now-obsolete Network Information Service. In POSIX-compliant environments, the command-line command id gives the current user's UID, as well as more information such as the user name, primary user group and group identifier (GID).
wikipedia  wikientry  debian  linux  unix  bsd  freebsd  history  solaris  sun  compatibility  hardwaresupport  sysadmin  info  links  reference 
5 weeks ago by ezequiel

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