15 fevereiro 2017
The Calabash Nebula from Hubble
Fast expanding gas clouds mark the end for a central star in the Calabash Nebula. The once-normal star has run out of nuclear fuel, causing the central regions to contract into a white dwarf. Some of the liberated energy causes the outer envelope of the star to expand. In this case, the result is a photogenic proto-planetary nebula. As the million-kilometer per hour gas rams into the surrounding interstellar gas, a supersonic shock front forms where ionized hydrogen and nitrogen glow blue. Thick gas and dust hide the dying central star. The Calabash Nebula, also known as the Rotten Egg Nebula and OH231.8+4.2, will likely develop into a full bipolar planetary nebula over the next 1000 years. The nebula, featured here, is about 1.4 light-years in extent and located about 5000 light-years away toward the constellation of Puppis.
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A Composer So Well-Loved, They Played His Own Music At His Funeral
When beloved Italian opera composer Giuseppe Verdi died in 1901, the country mourned and an estimated 300,000 thousand attended his funeral. As part of the ceremony, the great Italian conductor Arturo Toscanini lead an orchestra and 830 singers through Verdi’s greatest hits.
How Roman Elections Worked During The Republic
How Roman Elections Worked During The Republic
Glacial 'Aftershock' Spawns Antarctic Iceberg
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Visit: http://ift.tt/ZZc6XB to read ‘On The Psychology and Pathology of So-Called Occult Phenomena’ in full for free! This classic article by Carl Jung was originally published in the book 'Collected Papers on Analytical Psychology’ in 1916.
February 15th 1564: Galileo Galilei bornOn this day in 1564,...
February 15th 1564: Galileo Galilei born
On this day in 1564, Italian astronomer Galileo Galilei was born near Pisa. As a young man, Galileo began studying medicine at the University of Pisa, but later changed to philosophy and mathematics. He left university before graduation due to financial difficulties, but went on to have a successful academic career. Galileo became interested in astronomy around the time of the invention of the telescope, and soon developed his own. He proved a talented astronomer, discovering mountains and valleys on the moon, four of Jupiter’s moons, and the phases of Venus. Galileo’s success did not go unnoticed, and he was appointed court mathematician in Florence. However, Galileo was accused of heresy for supporting the Copernican theory that the sun, not the Earth, was at the centre of the solar system. The Church turned against Galileo, and in 1632 he was summoned to the Inquisition in Rome. After a long trial, and with the threat of torture hanging over him, Galileo recanted his support for Copernican theory. The Inquisition found him guilty and sentenced him to life imprisonment, which was commuted to permanent house arrest. Galileo continued to research and write until his death in January 1642 aged 77. The Church officially dropped its opposition to heliocentrism in 1835, and Galileo has since been redeemed and acknowledged as the great scientific mind he was.
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