Sunday, 19 July 2015

Those Without God Yeah

The 19th-century German political theorist and sociologist Karl Marx criticised religion as "the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people".

Some prominent atheists—including communists such as Karl Marx and Vladimir Lenin, philosopher Bertrand Russell, novelist José Saramago, and New Atheists, Christopher Hitchens, Daniel Dennett, Sam Harris and Richard Dawkins—have criticized religions, citing harmful aspects of religious practices and doctrines. Citing anti-religious ideology, Marxist‒Leninist atheism, Maoism, and similar movements have purged or persecuted religious people, while, in modern democracies, atheists have often engaged in debate with religious advocates, and the debates sometimes address the issue of whether religions provide a net benefit to individuals and society.

Thursday, 16 July 2015

Better to run it in safe mode

The benefits of using MSCONFIG /Safe Mode and Networking 

No getting out of it - You will have to go in..msconfig!

Windows Start-Up confusion Pop-up

Windows Error Messages

Use "Automatic Repair" - and it never worked 

Imagine trying to start-up this old Windows beast...

The PC blew up from wrong power supply connection - Calmy walked off and left the chaos behind....

Monday, 6 July 2015

The Magnetic Field Of The Sun

The Sun is a magnetically active star. It supports a strong, changing magnetic field that varies year-to-year and reverses direction about every eleven years around solar maximum.

 The Sun's magnetic field leads to many effects that are collectively called solar activity, including sunspots on the surface of the Sun, solar flares, and variations in solar wind that carry material through the Solar System.

 The effects of solar activity on Earth include auroras at moderate to high latitudes and the disruption of radio communications and electric power. 

Solar activity is thought to have played a large role in the formation and evolution of the Solar System. Solar activity changes the structure of Earth's outer atmosphere. 

All matter in the Sun is in the form of gas and at high temperatures, plasma. This makes it possible for the Sun to rotate faster at its equator (about 25 days) than it does at higher latitudes (about 35 days near its poles). 

The differential rotation of the Sun's latitudes causes its magnetic field lines to become twisted together over time, producing magnetic field loops to erupt from the Sun's surface and trigger the formation of the Sun's dramatic sunspots and solar prominences (see Magnetic reconnection). 

This twisting action creates the solar dynamo and an 11-year solar cycle of magnetic activity as the Sun's magnetic field reverses itself about every 11 years. 

The solar magnetic field extends well beyond the Sun itself. The magnetized solar wind plasma carries the Sun's magnetic field into space forming what is called the interplanetary magnetic field. Since the plasma can only move along the magnetic field lines, the interplanetary magnetic field is initially stretched radially away from the Sun.

 Because the fields above and below the solar equator have different polarities pointing towards and away from the Sun, there exists a thin current layer in the solar equatorial plane, which is called the heliospheric current sheet.

 At great distances, the rotation of the Sun twists the magnetic field and the current sheet into the Archimedean spiral like structure called the Parker spiral.

 The interplanetary magnetic field is much stronger than the dipole component of the solar magnetic field. The Sun's dipole magnetic field of 50–400 ?T (at the photosphere) reduces with the cube of the distance to about 0.1 nT at the distance of the Earth.

 However, according to spacecraft observations the interplanetary field at the Earth's location is around 5 nT, about a hundred times greater. The difference is due to magnetic fields generated by electrical currents in the plasma surrounding the Sun.

Monday, 29 June 2015

Nebula - Lagoon

The Lagoon Nebula (Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as a H II region.

The Lagoon Nebula is estimated to be between 4,000-6,000 light years from the Earth. In the sky of Earth, it spans 90' by 40', translates to an actual dimension of 110 by 50 light years.

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Saturday, 27 June 2015

Massive Old Stars

Eta Carinea

Eta Carinae formerly known as Eta Argus, is a stellar system containing at least two stars with a combined luminosity over five million times that of the Sun, located around 7500 light-years (2300 parsecs) distant in the direction of the constellation Carina...

First recorded as a 4th magnitude star, it brightened considerably over the period 1837 to 1856 in an event known as the Great Eruption. Eta Carinae became the second brightest star in the sky between 11 and 14 March 1843 before fading well below naked eye visibility. It has brightened consistently since about 1940, peaking above magnitude 4.5 in 2014.

Eta Carinae is circumpolar south of latitude 30°S, so it is never visible north of latitude 30°N.

The two main stars of the Eta Carinae system have an eccentric orbit with a period of 5.54 years. The primary is a peculiar star similar to a luminous blue variable (LBV) that initially had around 150 solar masses and has since lost at least 30. Because of its mass and the stage of its life, it is expected to explode as a supernova or hypernova in the astronomically near future.

This is currently the only star known to produce ultraviolet laser emission. The secondary star is hot and also highly luminous, probably of spectral class O, around 30 times as massive as the Sun. The system is heavily obscured by the Homunculus Nebula, material ejected from the primary during the Great Eruption. It is a member of the Trumpler 16 open cluster within the much larger Carina Nebula. The weak Eta Carinids meteor shower has a radiant very close to Eta Carinae.