Thursday, March 7, 2013

Maria Mitchell Biography

Maria Mitchell was born to William Mitchell and Lydia Coleman on August 1st, 1818. She was the third of ten children born to her parents and her family was a part of the Society of Friends, or Quakers, who had moved from England to America. Her parents both had strong passions for learning as her mother had worked in a library for two years for the sole purpose of reading all the books it contained. Her father provided for the family by rating chronometers of ships' captains. A chronometer is a very precise clock which was used by captains to determine their exact longitude. They used this information to navigate by means of the stars. On the side, her father was an amateur astronomer who inspired Maria's love for the heavens. As a child, she helped her father with his work and through this process, learned about both mathematics and astronomy.



            Her Quaker family believed that equal importance should be given to the education for both boys and girls. They lived in an area which was full of natural phenomena which helped to inspire Maria's love for nature and science. She went to a private elementary school and then later to a school which her father ran. His school focused mostly on observations of nature. She then attended the Cyrus Peirce's school for young ladies where the headmaster saw her unique abilities in math and science and encouraged her to pursue her education with a passion. She was described as being “born of only ordinary capacity, but of extraordinary persistency.” She also worked as a librarian for twenty years and continued her own study while employed. She was fluent in French and studied science textbooks in that language. Because of her passion for education, she started her own school in 1835. She was an unconventional instructor who began school before sunrise for the purpose of watching birds with students in the morning and also stayed late into the night to view the stars. Throughout her life, she earned an honorary degree from Hanover College in 1853, Columbia University in 1887, and an honorary doctorate from Rutgers Female College a few years later.
Because she had been so passionate about education and in particular astronomy, Maria was frequently seen making observations at night. During her childhood, she was a helper to her father and together they made thousands of observations which were used for the U.S. Coast Survey. During her life, she also was a computer for the American Ephemeris and Nautical Almanac, working there for 19 years. All of the observations were regarding accurate time and latitude. In 1847, she discovered a new comet which was named after her and brought her worldwide fame. She first viewed it while at her father's observatory, using only a two inch telescope. The King of Denmark gave her a gold medal for her discovery and after that, she became a well known astronomer in both the United States and Europe. She is considered to be the first well known woman astronomer. In 1848 she was the first woman to be elected into the American Academy of Arts and Sciences, her membership being proposed by the very well known geologist Louis Agassiz. She joined the American Association for the Advancement of Science in 1850. In 1857, Maria became the chaperone for the daughter of a prominent Chicago business man and traveled with her to Europe. She visited many observatories during her trip and even met one of her idols, the astronomer Mary Somerville. Soon after, Maria was asked to be a professor of astronomy and the director of the observatory for Vassar College. She encouraged small classes made up of conversation rather than lecturing. Because she felt such a passion for granting other women the opportunities she was given as a child in terms of education, she decided at this point in her life to devote her Maria Mitchell was born to William Mitchell and Lydia Coleman on August 1st, 1818. She was the third of ten children born to her parents and her family was a part of the Society of Friends, or Quakers, who had moved from England to America. Her parents both had strong passions for learning as her mother had worked in a library for two years for the sole purpose of reading all the books it contained. Her father provided for the family by rating chronometers of ships' captains. A chronometer is a very precise clock which was used by captains to determine their exact longitude. They used this information to navigate by means of the stars. On the side, her father was an amateur astronomer who inspired Maria's love for the heavens. As a child, she helped her father with his work and through this process, learned about both mathematics and astronomy.
Her Quaker family believed that equal importance should be given to the education for both boys and girls. They lived in an area which was full of natural phenomena which helped to inspire Maria's love for nature and science. She went to a private elementary school and then later to a school which her father ran. His school focused mostly on observations of nature. She then attended the Cyrus Peirce's school for young ladies where the headmaster saw her unique abilities in math and science and encouraged her to pursue her education with a passion. She was described as being “born of only ordinary capacity, but of extraordinary persistency.” She also worked as a librarian for twenty years and continued her own study while employed. She was fluent in French and studied science textbooks in that language. Because of her passion for education, she started her own school in 1835. She was an unconventional instructor who began school before sunrise for the purpose of watching birds with students in the morning and also stayed late into the night to view the stars. Throughout her life, she earned an honorary degree from Hanover College in 1853, Columbia University in 1887, and an honorary doctorate from Rutgers Female College a few years later.
Because she had been so passionate about education and in particular astronomy, Maria was frequently seen making observations at night. During her childhood, she was a helper to her father and together they made thousands of observations which were used for the U.S. Coast Survey. During her life, she also was a computer for the American Ephemeris and Nautical Almanac, working there for 19 years. All of the observations were regarding accurate time and latitude. In 1847, she discovered a new comet which was named after her and brought her worldwide fame. She first viewed it while at her father's observatory, using only a two inch telescope. The King of Denmark gave her a gold medal for her discovery and after that, she became a well known astronomer in both the United States and Europe. She is considered to be the first well known woman astronomer. In 1848 she was the first woman to be elected into the American Academy of Arts and Sciences, her membership being proposed by the very well known geologist Louis Agassiz. She joined the American Association for the Advancement of Science in 1850. In 1857, Maria became the chaperone for the daughter of a prominent Chicago business man and traveled with her to Europe. She visited many observatories during her trip and even met one of her idols, the astronomer Mary Somerville. Soon after, Maria was asked to be a professor of astronomy and the director of the observatory for Vassar College. She encouraged small classes made up of conversation rather than lecturing. Because she felt such a passion for granting other women the opportunities she was given as a child in terms of education, she decided at this point in her life to devote her work to education rather than practical astronomy. In 1873, she founded the Association for the Advancement of Women and served as president. After her work with this agency advocating for the recognition of women's contributions to science, she was the first woman elected to the American Philosophical Society in 1873. Regarding her job as either a teacher or observer, Maria said, “the scientist should be free to pursue his investigations. He cannot be a scientist and a schoolmaster... It is not all mathematics, nor all logic but is somewhat beauty and poetry.” After her death, Maria had a crater named after her on the moon. Also, the Maria Mitchell Association of Nantucket was formed in her honor, maintaining the Maria Mitchell Observatory. There are now several institutions named after her such as the Boston Public Library and a public school located in Denver, Colorado.work to education rather than practical astronomy. In 1873, she founded the Association for the Advancement of Women and served as president. After her work with this agency advocating for the recognition of women's contributions to science, she was the first woman elected to the American Philosophical Society in 1873. Regarding her job as either a teacher or observer, Maria said, “the scientist should be free to pursue his investigations. He cannot be a scientist and a schoolmaster... It is not all mathematics, nor all logic but is somewhat beauty and poetry.” After her death, Maria had a crater named after her on the moon. Also, the Maria Mitchell Association of Nantucket was formed in her honor, maintaining the Maria Mitchell Observatory. There are now several institutions named after her such as the Boston Public Library and a public school located in Denver, Colorado.   
Sources:

Ragan, Gay A. "Mitchell, Maria." Mathematics. Ed. Barry Max Brandenberger, Jr. Vol. 3. New York:                
Macmillan Reference USA, 2002. 51. Gale Virtual Reference Library. Web. 7 Mar. 2013.

DEROCHE, CELESTE. "Mitchell, Maria." American Women Writers: A Critical Reference Guide from Colonial Times to the PresentA Critical Reference Guide from Colonial Times to the Present. Ed. Taryn Benbow-Pfalzgraf. 2nd ed. Vol. 3. Detroit: St. James Press, 2000. 151-152. Gale Virtual Reference Library. Web. 7 Mar. 2013.

"Maria Mitchell." Encyclopedia of World Biography. 2nd ed. Vol. 11. Detroit: Gale, 2004. 61. Gale Virtual Reference Library. Web. 7 Mar. 2013.

"Mitchell, Maria." Complete Dictionary of Scientific Biography. Vol. 9. Detroit: Charles Scribner's Sons, 2008. 421-422. Gale Virtual Reference Library. Web. 7 Mar. 2013.

Friday, March 1, 2013

APOD 3.7

March 1 2013 Colors of Mercury

See Explanation.  Clicking on the picture will download 
the highest resolution version available.

    This picture shows Mercury, our solar system's innermost planet.  Mercury has an orbital period of 88 days and can reach 800 degrees Fahrenheit on its surface.  This image was taken using the MESSENGER (MErcury Surface Space ENvironment, GEochemistry, and Ranging) spacecraft which is orbiting Mercury. This photo is enhanced to show color because the human eye would not be able to discern the colorful features visible here.  The colors are real though and reflect the chemicals and minerals present on the surface.   The Caloris basin can be seen in the upper right hand corner.  It was created by an asteroid which struck the planet in the early days of the solar system.  After the impact, lava entered the basin and created the feature which can now be seen.  

Tuesday, February 26, 2013

Planetary Nebula

ESO 456-67

Glowing, fiery shells of gas
    This planetary nebula, named ESO 456-67 is located in the constellation Sagittarius.  It is in the southern sky and shows clearly the different layers of material which were expelled by the star at the center.  It is located 10,000 light years from Earth.  






Biography Sources

Maria Mitchell

Ragan, Gay A. "Mitchell, Maria." Mathematics. Ed. Barry Max Brandenberger, Jr. Vol. 3. New York: Macmillan Reference USA, 2002. 51. Gale Virtual Reference Library. Web. 26 Feb. 2013.

"Mitchell, Maria." Complete Dictionary of Scientific Biography. Vol. 9. Detroit: Charles Scribner's Sons, 2008. 421-422. Gale Virtual Reference Library. Web. 26 Feb. 2013.

"Maria Mitchell." Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 5: 1800 to 1899. Detroit: Gale, 2000. 498. Gale Virtual Reference Library. Web. 26 Feb. 2013.

"Maria Mitchell." Encyclopedia of World Biography. 2nd ed. Vol. 11. Detroit: Gale, 2004. 61. Gale Virtual Reference Library. Web. 26 Feb. 2013.

Friday, February 22, 2013

APOD 3.6

20 Feb 2013 Saturn's Hexagon and Rings

See Explanation.  Clicking on the picture will download 
the highest resolution version available.

    This feature of hexagonal clouds on Saturn is very odd and scientists do not know the reason for its formation.  It was discovered during the 1980s when the Voyager flew by the planet.  No similar features have since been sighted anywhere in the Solar System.  The South pole of Saturn is known as having a strange rotating vortex and this image shows the North Pole with this mysterious cloud pattern.  This image was taken by the Cassini Spacecraft which reached Saturn in 2004.  This shows that the clouds have been active for over 20 years since the Voyager sighting.  This feature of the planet is very massive as four Earths could easily fit inside of it.  

APOD 3.5

12 Feb 2013 Reflected Aurora Over Alaska

See Explanation.
Moving the cursor over the image will bring up an annotated version.
Clicking on the image will bring up the highest resolution version
available.

An aurora is a glow in the upper atmosphere created by energy particles entering the atmosphere from space.  The magnetosphere provides the particles that create auroras seen from Earth.  The colors are determined by the composition and density of the atmosphere where it is created.  A subvisual aurora is one which cannot be seen with the naked eye and requires a camera to view.  This image features both visual and subvisual auroras; the green were visible to the naked eye but the red areas only appeared in the captured image.  The reason for this increased visibility through the lens of a camera is that cameras offer more exposure time than the human eye which only collects light for fractions of seconds at a time.  This image was taken in Anchorage, Alaska and features the Pleiades star cluster and Jupiter.  These red and green auroras were most likely created by oxygen particles.

Friday, February 8, 2013

APOD 3.4


See Explanation.  Clicking on the picture will download 
the highest resolution version available.

NGC 6822: Barnard's Galaxy
         

    The galaxy pictured, NGC 6822, is classified as small despite the fact that it is over 7,000 light-years across.   It is also called Barnard's Galaxy and has a magnitude of 9.3.  It contains the Bubble Nebula and is 1.5 million light-years away.  The blue stars are relatively young while the pinkish areas are where new stars are forming.  This image was taken using the Lowell Amateur Research Initiative with the Lowell Observatory.