Since the late 19th century, adventurous female ‘eclipse chasers’ have contributed to science in Australia
A total solar eclipse is a remarkable alignment of our Sun, Earth and the Moon, as the latter casts a perfect shadow across the former.
If you’re in the narrow path of the shadow of the Moon, at the moment of totality you are plunged into darkness. Stars and planets emerge in the sky, and the entire atmosphere changes. This immersion in a total solar eclipse is unforgettable.
As 21-year-old Australian Miriam Chisholm reported in 1922,
I looked up from the telescope just an instant before totality and thought I saw the Corona, a pale fringe around the Sun […] and then the light went out and we saw it in all its glory.Historically, total solar eclipses were a unique opportunity to conduct scientific research about our Sun, the closest star. Using special instruments called spectroscopes, it was possible to decipher the chemical composition of the gases emitted by the Sun – but only during a total eclipse.
. . .perhaps the best-known eclipse experiment was the proof of Albert Einstein’s general theory of relativity. In the early 20th century this theory could only be tested during the minutes of totality, requiring a clear sky around the covered Sun so you could photograph the stars. . . .
The first Australian woman whose total solar eclipse observations were officially reported was Annie Louisa Virginia Dodwell. She had a Bachelor of Science from the University of Adelaide and gained astronomy knowledge working with her husband George Dodwell, the South Australian Government Astronomer. . . .
In 1922 an international team of astronomers, led by William Campbell, Director of Lick Observatory, and assisted by the Australian Navy, travelled to a remote location in Western Australia to confirm Einstein’s general theory of relativity during the September 21 total solar eclipse.
There were five women participating in this expedition: Elizabeth Campbell, Jean Chant with her daughter Elizabeth, Eleanor Adams and Mary Acworth Evershed.
Four women in 1922 aboard a ship.
Four of the women who participated in the total solar eclipse expedition led by Lick Observatory to Wallal Downs on their way from Broome to Ninety Mile Beach, Western Australia, 1922. Left to right: Elizabeth Chant (1899-1982), Jean Chant (1870-1940), Mary Acworth Evershed (1867-1949), Elizabeth Ballard Campbell (1869-1961). Collection State Library Western Australia, 4131B/1/24. Colourised. State Library Western Australia
While they were the wives and daughter of respective male astronomers, each woman was a seasoned eclipse observer in her own right. They knew how to operate and use technical equipment and contributed substantially to reporting the scientific work.
Elizabeth Campbell organised the supplies and operated spectroscopic and photographic telescope equipment during the eclipse. Eleanor Adams worked with her husband on the large 12-metre eclipse camera. Jean Chant observed the shadow bands and changing brightness of the sky, and Elizabeth Chant operated a prism that polarised light.
Mary Acworth Evershed was an established expert in solar physics and worked alongside her husband, director of the Kodaikanal solar observatory in India. She photographed the spectra of the Sun’s corona. . . .
On the other side of the continent, a very different eclipse expedition was organised by 21-year-old Miriam Chisholm with her school friend Frida Tindal. Chisholm’s father, Frank, drove them over 950 kilometres from Goulburn to southern Queensland.
They lost four days when their car was bogged in mud and almost didn’t make it to the line of totality. Thankfully, due to excellent time-keeping and navigation they had a successful eclipse. They drew the Sun’s corona, measured the temperature, observed how animals and birds became quiet and timed the shadow bands. Their report is descriptive, inspiring and filled with detailed observations. It is still a useful guide on how to make the most of a total solar eclipse experience. . . .
On April 20 2023 a total solar eclipse will be visible from Exmouth in Western Australia. This is the first total solar eclipse in Australia since 2012.
Heh, a slightly different take on the sun.
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Eclipse chasers (Read 300 times)
