I am a native in this world And think in it as a native thinks
Thursday, January 30, 2020
Tuesday, January 28, 2020
Astronomy Tuesday
All the light we cannot see....
Well, most of us can see light, at least in the aptly named visible spectrum, but there's so much more that we can't see, not just the various frequencies of non-visible radiation, but also the dark matter that makes up so much of our universe. At least we have instruments that can see the non-visible forms of light for us. Dark matter not only can't be seen, we actually have no idea what it is.
UGC 2885 was one of the spiral galaxies whose rotation was studied by Vera Rubin in the Sixties. She found that the mass of the visible stars couldn't account for how fast the galaxy's stars were rotating around its center. Unless there was a large amount of matter that we couldn't see, the galaxies should have been flying apart. Thanks to her work, we now know that perhaps 80% of the universe consists of dark matter. This isn't just a new form of the matter we're used to -- protons, neutrons and electrons -- that's for some reason hard to see from Earth. It doesn't seem to interact with what we think of as matter at all, so it may consist of entirely new subatomic particles, almost a universe within a universe.
Think about that. We know so much about the universe, macro and micro, close up and impossibly far away, and yet 80% of it consists of something we know absolutely nothing about. We know it's there. And that's just about all we know.
Image Credit: NASA, ESA, B. Holwerda (University of Louisville)
Well, most of us can see light, at least in the aptly named visible spectrum, but there's so much more that we can't see, not just the various frequencies of non-visible radiation, but also the dark matter that makes up so much of our universe. At least we have instruments that can see the non-visible forms of light for us. Dark matter not only can't be seen, we actually have no idea what it is.
UGC 2885 was one of the spiral galaxies whose rotation was studied by Vera Rubin in the Sixties. She found that the mass of the visible stars couldn't account for how fast the galaxy's stars were rotating around its center. Unless there was a large amount of matter that we couldn't see, the galaxies should have been flying apart. Thanks to her work, we now know that perhaps 80% of the universe consists of dark matter. This isn't just a new form of the matter we're used to -- protons, neutrons and electrons -- that's for some reason hard to see from Earth. It doesn't seem to interact with what we think of as matter at all, so it may consist of entirely new subatomic particles, almost a universe within a universe.
Think about that. We know so much about the universe, macro and micro, close up and impossibly far away, and yet 80% of it consists of something we know absolutely nothing about. We know it's there. And that's just about all we know.
Image Credit: NASA, ESA, B. Holwerda (University of Louisville)
Sunday, January 26, 2020
Saturday, January 25, 2020
Thursday, January 23, 2020
Tuesday, January 21, 2020
Astronomy Tuesday
I feel as though this image should be accompanied by the theme to Star Wars.
This is a Herbig-Haro object, a more than usually mundane name for something quite splendid. They're disturbances in the Force, um, patches of nebulosity caused by newborn stars.
The star causing all this mayhem is hidden in the cloud, but those long, lightsaber-like beams are jets of gas and dust that have fallen into the star and are blasted out along its axis of rotation.
Image Credit: NASA, ESA, Hubble Heritage (STScI / AURA) / Hubble-Europe Collaboration Acknowledgment: D. Padgett (GSFC), T. Megeath (University of Toledo), B. Reipurth (University of Hawaii)
Sunday, January 19, 2020
Saturday, January 18, 2020
Saturday reflections
The Galleria Trees in Calgary made wonderful reflections.
I'm sure they're doing their best to blunt the winter winds coming off the prairies, but all things considered, I'd just as soon be in New York this time of year.
Friday, January 17, 2020
Wednesday, January 15, 2020
Tuesday, January 14, 2020
Astronomy Tuesday
Something a little different: the wonderful blue colors are reflection nebulae, reflecting the light from young stars on the cosmic dust. The curves in the nebulae to the left are caused by the jets blasting out from embedded newborn stars.
Image Credit and Copyright: CHART32 Team, Processing - Johannes Schedler
Sunday, January 12, 2020
Saturday, January 11, 2020
Friday, January 10, 2020
Thursday, January 9, 2020
Tuesday, January 7, 2020
Monday, January 6, 2020
Fête de Noël
Our tour ended with Christmas dinner at the Château Frontenac.
It was four courses, not including an amuse bouche and dessert, and I was pretty much done halfway through the second course. I barely tasted the tenderloin, and ate exactly one bite of dessert. But I very much enjoyed the spectacle of it all -- getting dressed up and heading to the Château, mingling with the crowds in the lobby, then heading up the stairs to the ballroom for dinner.
I did love that they translated mousseline de courge as “squash muslin.” Muslin -- the fabric -- is mousseline in French, but an edible mousseline would never be called a muslin in English.
Sunday, January 5, 2020
Benedict Arnold was here
I had long forgotten -- if I ever knew -- that an invasion of Quebec was part of the Continental army strategy during the Revolutionary War.
The assault on Quebec City on December 31, 1775 was led by Richard Montgomery and Benedict Arnold, and was a failure. Montgomery was killed and Arnold's leg was shattered, but for some reason the fact that he reached Quebec at all was enough to earn him a promotion to general.
These plaques near the Place Royale commemorate the Canadian victory.
Labels:
battles,
Canada,
history,
Quebec,
Quebec City,
Revolutionary War,
war
Saturday, January 4, 2020
Christmas in le Petit-Champlain
It is basically Whoville, minus the Grinch -- there were carolers, trees and lights and Christmas decorations, and children posing for pictures on Père Noël's lap.
Le Petit-Champlain
A last view, taken as the ferry pulled in.
The neighborhood below the cliffs is called le Petit-Champlain, and it's the oldest part of the city, and quite possibly the most charming.
You can get there via funicular, from the terrace outside the Château Frontenac, or you can use the stairs (called the Breakneck Stairs for good reason -- they're very steep. I took them once, but used the funicular to go back up.)
City from the ferry
Here's the city seen from the ferry, floating on its magic carpet of ice.
I celebrated the New Year by catching a cold, so I've been lazy about processing and posting pictures. I caught the Emma Thompson Sense and Sensibility on TV earlier in the week, and enjoyed it very much, though Hugh Grant made a most unsatisfactory Edward Ferrars -- he sidled into every scene like a child playing dress up in Mom's high heels -- and I much preferred Alan Rickman's Colonel Brandon as a potential husband for the Dashwood sisters.
So I nursed my cold by drinking tea and re-reading the book, which was not such a bad way to start the year.
Labels:
#travelswithkathleenblog,
Canada,
cities,
ferry,
ice,
Quebec,
Quebec City
And ice
I was not surprised to learn that the St. Lawrence River used to freeze over every winter. Icebreakers keep it open now, because it's a critical shipping lane between the Atlantic and the Great Lakes, but there's still an abundance of ice. We had a free afternoon on Christmas Eve, and I took the ferry across the river and back to see it close up. It reminded me of Antarctica.
Labels:
#travelswithkathleenblog,
Canada,
ferry,
ice,
Quebec,
Quebec City,
rivers
Wednesday, January 1, 2020
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