1929 Cosmic Times
This poster is the second edition of the Cosmic Times, with the
publication date chosen to coincide with the announcement of Hubble's
results which found that the Universe was expanding. These results were
contrary to Einstein's assumption of a static Universe. In addition, in order to show that the galaxies were all moving away from us, Hubble first showed that there were other galaxies outside the Milky Way.
1929 Article Overview
| Article |
Thread |
Summary |
| Andromeda Farther Away Than Originally Thought |
Size of the Universe |
Hubble's observations of Cepheid variable stars in Andromeda show that
it is actually separate from our Milky Way galaxy. |
| Universe is Expanding |
Expanding Universe |
Hubble's careful distance calculations coupled with redshift
measurements show that the Universe is expanding. |
| Sidebar: The Minds atop Mount Wilson |
-- |
Biographical information about Hubble and his assistant, Humason. |
| Sidebar/Fun Fact: Classifying Clouds |
-- |
Brief overview of Hubble's system of classifying galaxies. |
| In Their Own Words |
-- |
Snippets of papers published by other astronomers during this time. The
snippet here is from Hubble about observing distant objects in the
Universe. |
1929 Lesson Overview
| Activity |
Summary |
Grade |
Discipline |
| |
|
MS |
HS |
|
| 1. Discovering the Milky Way |
Students will look at historic astronomical data to find a pattern
originally seen by Henrietta Leavitt. |
|
x |
Physics, Astronomy
|
| 2. Just How Far is that Star? |
Students will work with light meters to determine how astronomers find
distances to objects of known brightness. |
|
x |
Physics, Astronomy
|
| 3. Cosmic CSI |
Students will explore what spectra from different elements looks like
and how astronomers can learn composition of objects with this tool. |
x |
|
Earth Science, Physical Science, Chemistry
|
| 4. Determining
the Universe |
Students will measure the size of several galaxies to reproduce a plot
of Hubble's Law. |
|
x |
Physics, Astronomy
|
| 5. Unsung Heroes of Science |
Students will explore figures in science who are often overlooked. |
x |
x |
Multidisciplinary |
|
