[DOC] [TLE] The Expanding Universe - SkyServer - SDSS [PAR] After Hubble discovered that the universe was expanding, Einstein called the ... 
paradoxes that troubled astronomers from ancient times until the early 20th 
Century. ... with its large systematic measurement of the galaxy density in the 
Universe, ... One question they try to answer is why the universe is primarily 
composed of... [DOC] [TLE] The Origin of the Universe - Stephen Hawking [PAR] They were therefore thought to be a constant background, and either to have 
existed ... If one believed that the universe had a beginning, the obvious question 
was ... was one of the most important intellectual discoveries of the 20th century, 
or of ... In the Steady State theory, as galaxies moved apart, the idea was that 
new... [DOC] [TLE] All about the Andromeda galaxy | Clusters Nebulae Galaxies ... [PAR] Sep 15, 2016 ... In autumn, the Great Square of Pegasus looks like a great big baseball diamond 
in the eastern sky. ... At one time, the Andromeda galaxy was called the Great 
Andromeda Nebula. ... It wasn't until the 20th century that astronomers were able 
to resolve the Andromeda spiral nebula into individual stars. [DOC] [TLE] `Great Debate' Lesson Plan for Undergraduates [PAR] Planets thought to define solar system size; Stars held on spherical shell(s); 
Kepler estimates ... Shapley's View of our Galaxy and the Universe in 1920 ... 
indicates external galaxy; Angular resolution improves - nearby galaxies 
resolved into ... From Earth's Southern Hemisphere, one could see large fuzzy 
patches called the... [DOC] [TLE] The Big Bang - The Star Garden [PAR] ... that the universe came into existence about 14 billion years ago, in the big 
bang. ... This was proven in the 20th century and since then, scientists have been 
trying to find ... 1. Einstein: a static universe . Russian mathematician Alexander 
..... old, but it is thought that the disc of the Galaxy formed about 9 billion years 
ago. [DOC] [TLE] HubbleSite - Hubble Breakthroughs - Cosmology Science [PAR] Hubble has shown us some of the universe's earliest galaxies and defined the ... 
by the expanding universe into an infrared glow  litter the most distant parts of 
the ... up against one another, as well as in elliptical galaxies, which are thought 
to ... By the late 20th century, astronomers were confident the answer was that the
... [DOC] [TLE] galaxy | astronomy | Britannica.com [PAR] Apr 13, 2016 ... He thought that, if the Milky Way Galaxy was so immense, then the spiral nebulae 
... During the early 20th century, one of the most important branches of ... The 
nature of galaxies and scale of the universe were the subject of the ... The van 
Maanen rotation also entered into Shapley's arguments: if spiral... [DOC] [TLE] Observable Universe contains ten times more galaxies than ... [PAR] Oct 13, 2016 ... One of the most fundamental questions in astronomy is that of just how ... The 
Hubble Deep Field images, captured in the mid 1990s, gave the first real insight 
into this. ..... Nobody thought the universe contained only those galaxies that ..... 
hang onto to zany outmoded 20th Century speculations about your... [DOC] [TLE] Origins: Hubble: People: Astronomer Edwin Hubble | Exploratorium [PAR] See how Hubble's pictures change our ideas about the universe, meet the 
people ... galactic home--constituted the entire universe, or whether ours was just 
one of ... for the Big Bang theory, providing evidence that the universe exploded 
into ... discovery as "one of the great intellectual revolutions in the twentieth 
century." [DOC] [TLE] universe | astronomy | Britannica.com [PAR] Dec 3, 2015 ... The model invoked small circles on top of large circles, all rotating at individual ... 
The system of Aristotle and its impact on medieval thought ... No further 
explanation was needed beyond the aesthetic one. In this .... The statistical 
studies based on these new perceptions continued into the early 20th century. [DOC] [TLE] Journey through the Expanding Universe  Demonstration Manual ... [PAR] A Universe of Galaxies  discovered in the last century: our universe is made ... 
The idea of an unchanging universe was well

Question: Into the 20th Century it was thought the universe was one big galaxy--this one
Answer: the Milky Way