The second model of the clocks of John Harrison, who won the prize
for developing accurate timekeepers (chronometers).
The astronomers at the RO developed accurate star charts through careful observing of the movements of celestial bodies. Determining the position of the Prime Meridian was a part of this problem.
The other main building on the hill was the Meridian Observatory
This is a Quadrant, used to measure the position angle of the moon and stars (sorry about the bad picture). This is in the position of where Halley determined the Meridian to be
Bradley's Transit instrument, for measuring the Meridan, which
improved on Halley's measurements.
And this is Airy's instrument, which again improved the position.
The biggest instrument is the Great Equatorial Telescope, sitting in the dome of the Meridian Observatory building.
This instrument was installed in1893. It's main lense is 28 inches in diameter and replaced one with a 12.8 inch lense. It was in use until 1947.
The term 'Equatoriial' refers to the mount, which is designed to follow the motion of the earth's equator by turning on a plane parallel to the earth's equator.
That's a short tour inside the building.
Outside here is me with a selfie, standing over the brass strip marking Airy's Prime Meridian.
You would think that the GPS in my phone would read a longitude of 0.0 degrees. But it doesn't, it reads -0.001501 degrees, about 100 meters west of 0.0.
Why? That is tonight's science question for you. If you really must know why, I can explain it to you at a break between Tai Chi sets 😊
That's it for the Royal Observatory. I have tons more pictures, but I won't bore you with them.
NATIONAL MARITIME MUSEUM
The National Maritime Museum is a short walk at the bottom of Observatory Hill. It's free and not very busy by the time I get there.
One bump in the road - my camera is almost out of juice. Too many photos & GPS checks, so I switch to a camera that I bring for exactly this problem.
A few interesting items as I head in:
Royal barge for Frederick, the Prince of Wales, son of George II
Various figureheads on the wall nearby
Binnacle from the wreck of Greenpeace's Rainbow Warrior
Stern decoration from the Implacable, 1805
(Before you proceed, guess when it was taken out of service)
I hope you can read this description - it is very interesting
Upstairs now, and one of the first displays talks about the Arctic Expeditions as well as the search for the Erebus, Terror, and Franklin's crew. There is underwater video of Parks Canada divers finding the wrecks.
There is poor lighting in these galleries and they frown on flash photography, so I apologize for the pictures. My phone is charging!
Other exhibits include Parry's expeditions to the Arctic, Polar Winds (life in the Arctic, with soundscape by Tanya Tagaq), and Scott's and Shackleton's expeditions to the south Pole.
Maritime Wars have a lot of attention paid to them.
August, 1588 battle against the Spanish fleet
There is an exhibit about the exploits of Admiral Horatio Nelson
HMS Victory, his flagship at the Battle of Trafalgar, 100 guns
A bit about his tactics. There were interesting animations
in the exhibit about his battles
Unfortunately, he was killed at the Battle of Trafalgar. Part of his funeral procession
I had to leave the museum shortly after this. There was lots more about the British Navy in this gallery, and later history in the following galleries. Needs another trip.
My 'adventure' (groan) on the way back to Cartwright Gardens: Remember two things I said earlier - Greenwich station was closed and my phone/GPS was low on battery. I wandered back a ways, and then caught a bus so I could ask the driver where I could catch the DLR railway. He dropped me off a block away from the (closed) Greenwich station and pointed in that direction. Thanks!
I walked to the Thames and remembered I had been here before on my cycle ride. Here's a photo of the Cutty Sark.
The other thing I remembered is that there is a walking tunnel under the Thames here.
Here's the entrance to the tunnel (full disclosure - the photo is from my 2018 trip)
The tunnel itself is boring - a semi-circulaar tunnel with dirty white porcelain tiles.
I popped through the tunnel to the station on the other side and got back nicely to the flat (for a well deserved beer)
That's it for Oct 22. Happy Birthday to my sister - the National Gallery card I sent her made it in time!
I just re-read this page and corrected (most, I hope) of the spelling errors. My typing is terrible when I'm tired.
Oct. 23 - A tour underground of the disused parts of the Underground. I have a charged phone, and a flashlight
Ian and I really enjoyed our day at Greenwich. Great pub in town with dogs sleeping under tables…. So homey. I loved Greenwich Musrum and Observatory as well. Long walk up through the park. You must had quite the day. Did you get a photo of yourself straddling the GMT line?
ReplyDeleteYup - you probably read the blog before I finished the RO section.
DeleteThanks for the card. (I’m going to wait to open it)
ReplyDeleteYou are Welcome
ReplyDeleteOh, goodie! Science lessons during Tai Chi breaks--something to look forward to! I also think your selfie skills need a little work. Feet and hands are a good start, but now we are ready for something more recognizably Greg--right, Nancy? (Any bets that we will now see elbows or knees in the next selfie?) Is London the city of museums? So many and so well done!! I admire, and am benefitting from your thirst for information. Dee
ReplyDeleteI just read Tanya Tagaq’s book (Split Tooth), and listened to part of the audio book. It’s very raw, well written, and disturbing. She reads the audio book and adds in a lot of throat singing. It’s not my thing, but I can see it would make for a powerful addition to the exhibit.
ReplyDelete