View allAll Photos Tagged textbook
Astronomy textbooks typically present galaxies as staid, solitary, and majestic island worlds of glittering stars.
But galaxies have close encounters that sometimes end in grand mergers and overflowing sites of new star birth as the colliding galaxies morph into wondrous new shapes.
Released in celebration of the Hubble Space Telescope's 18th launch anniversary, these views illustrate how galaxy collisions produce a remarkable variety of intricate structures.
Astronomers estimate that only one out of 1,000 galaxies in the nearby universe is in the act of colliding. However, galaxy mergers were much more common long ago when they were closer together, because the expanding universe was smaller. Astronomers study how gravity choreographs their motions in the game of celestial bumper cars and try to observe them in action.
For all their violence, galactic smash-ups take place at a glacial rate by human standards — timescales on the order of several hundred million years. The images in the Hubble atlas capture snapshots of the various merging galaxies at various stages in their collision.
For more information and additional colliding galaxies, visit: hubblesite.org/contents/news-releases/2008/news-2008-16.html
Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University)
As a child, textbooks drafted a landscape in my mind;
A meadow where crystal-like clear water streams through lush green grass; where there are mountains, and sheep, and shepherd, but no tourists; where wind is quiet and peaceful; where sky is clear; where there are reflections; and where nothing drastic like steep mountains or big lakes exist.
Travelling along 10 miles long Noori-Naar, I was sure that the author tried to portray this place, in his text. It's a place, where I would love to wander all day long.
Noori-Naar connects the valleys of Kaghan and Neelum, in Northern Pakistan. Noori-Pass (White Snowed Mountain above) is the junction.
Grenouille des Pyrénées, stades de croissance
Series on white background
Jane was a strange child........
Illustrated by Marguerite Davis. “Summer Fun” copyright 1932, by J. Mace Andress and Annie Turner Andress. Ginn and Company. Actually a health primer.
WEEK 14 – Barnes & Noble Ole Miss: Reunionited and It Feels So Good (I)
Glancing to the right, we see the textbook mecca, where a couple of other customers were also here to pick up their books. That was the reason for my visit on this date, too. I was here before the semester actually began, so that’s why the place wasn’t jam-packed. But I do have to say that I hope they managed to get back in a groove once the semester did begin: even though the store had been open since May, the spring 2019 textbook returns and May Intersession 2019 textbook purchases were all handled at the temporary JAC location, so besides summer classes this was to be the first big textbook season back at the Union in their new store. And it was clear that they weren’t really up-to-par just yet. (Granted, though: they never really did set a high bar on any of my visits, lol…)
(c) 2021 Retail Retell
These places are public so these photos are too, but just as I tell where they came from, I'd appreciate if you'd say who :)
north side "pk 8884", Granite Range, Wrangell-St Elias NP, Alaska
also see discussion www.reddit.com/r/NatureIsFuckingLit/comments/1cnr5c9/glac...
my photos arranged by subject - www.flickr.com/photos/29750062@N06/collections
The architecture of Chartres cathedral is often given as an example of the typical gothic style. Here is a ribbed vault and a tripartite elevation – arcade, triforium and clerestory.
The lowest level is made of a series of pointed arches. This supports narrow gallery with a row of elegant columns. Above the triforium the clerestory is lit by a series of double lanced windows. It is crowned with a quadripartite ribbed vault.
Where the ribs and transverse arches meet the sides of the building flying buttresses outside hold their trust.
This system, which is what the gothic architecture is about, made it possible to build higher and to open the walls and fill them with stained glass.
HDR