How do we know the Milky Way is a spiral? | The History of the Milky Way

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Dr. Becky

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Shared June 12, 2019

Ever see people wearing those T-shirts with a spiral galaxy on saying "You are here" to mark the position of the Sun? The story of how we figured out the Milky Way was a spiral galaxy and where the Sun was in that big structure, starts all the way back in 1610 with Galileo Galilei...

You can pre-order my book ' Space: 10 Things You Should Know' as a hardback (UK only) or e-book (worldwide): http://bit.ly/SpaceDrBecky

Sorry about the clicking noises throughout this video, my new Saturn necklace (which I LOVE) from Pull & Bear was too long and kept hitting my microphone: https://www.pullandbear.com/gb/woman/...

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And on Instagram: https://www.instagram.com/drbecky_s/

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My sister made the frame in the background as a present when I passed my PhD. It's not a real certificate. It's a decorative frame in my office which I love. My sister does commissions if anyone else wants one: https://megansmethurstdesign.wordpres...

We're moving house soon so I'm hoping to get more prints to decorate my new office!

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Here are links to the papers mentioned:

Kant (1755) - http://johnstoniatexts.x10host.com/ka...
Herschel (1785) - https://www.jstor.org/stable/pdf/1067...
Rosse (1850) - https://www.jstor.org/stable/pdf/1084...
Kapteyn (1904) - http://articles.adsabs.harvard.edu/pd...
Leavitt (1912 - published under her male supervisor's name Pickering) - http://articles.adsabs.harvard.edu/pd...
Curtis (1917) - http://articles.adsabs.harvard.edu/pd...
Shapley (1918) - http://articles.adsabs.harvard.edu/pd...
Hubble (1926) - http://articles.adsabs.harvard.edu/pd...
Trumpler (1930) - http://articles.adsabs.harvard.edu/pd...
Ewen & Purcell (1951) - https://www.nature.com/articles/168356a0
Christiansen & Hindman (1952) - http://articles.adsabs.harvard.edu/pd...
Rubin (1970) - http://articles.adsabs.harvard.edu/pd...
Georgelin & Georgelin (1976) - http://articles.adsabs.harvard.edu/pd...
Zaritsky (1989) - http://articles.adsabs.harvard.edu/pd...
Bahcall (1994) - http://articles.adsabs.harvard.edu/pd...
Benjamin (2005) - https://arxiv.org/pdf/astro-ph/050832...




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Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford.

http://drbecky.uk.com



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