Growing up at a time when the Hubble Space Telescope orbits above our heads and giant telescopes are springing up on the great mountaintops of the world, you may be surprised to learn that we were not sure about the existence of other galaxies for a very long time. The very idea that other galaxies exist used to be controversial. Even into the 1920s, many astronomers thought the Milky Way encompassed all that exists in the universe. The evidence found in 1924 that meant our Galaxy is not alone was one of the great scientific discoveries of the twentieth century.---------------------------------------Distant Nature: Astronomy Exercises 2016 by Stephen Tuttle under license "Creative Commons Attribution Non-Commercial Share Alike".

These activities cover topics in Galaxies and Cosmology, aligned with the OpenStax Astronomy textbook. Topics cover chapters 1, 5, 6, 24-30, and sections of chapter 17 and 19 concerning distance. All activities are designed to be done in small groups in the classroom, but most can be adapted for use as homework or projects. Quantitative and Hands-on activities may be used as labs.

This is one part of an astronomy resource collection by Lane Community College. This collection was built by Andrea Goering (goeringa@lanecc.edu) and Richard Wagner (wagnerr@lanecc.edu), instructors of physics and astronomy at Lane Community College in Eugene, Oregon, USA. Development of these resources was funded through LCC's OER Initiative (https://inside.lanecc.edu/oer). We'd love to hear about your use of these resources! Let us know what you're using, sign up for updates, and submit corrections, suggestions, or comments here: https://forms.gle/un49RUNs55GU3ZNF6

Find the full collection here: https://docs.google.com/spreadsheets/d/142FgVMDHZ7bu53gihe3kJ_-5PzsnuzfMklJ1ZLMFk2E/edit#gid=315930953

Astronomy is designed to meet the scope and sequence requirements of one- or two-semester introductory astronomy courses. The book begins with relevant scientific fundamentals and progresses through an exploration of the solar system, stars, galaxies, and cosmology. The Astronomy textbook builds student understanding through the use of relevant analogies, clear and non-technical explanations, and rich illustrations. Mathematics is included in a flexible manner to meet the needs of individual instructors.

This reference list has 11 kid-friendly books on a wide range of astronomy topics. For each title, the publisher and publication date are included along with author name.

Intended for all audiences, this textbook is an introduction to the nature of the universe. Use it to research or review our solar system, stars, galaxies, and the history of the universe. Each chapter has a set of corresponding homework questions.

This course provides an overview of astrophysical cosmology with emphasis on the Cosmic Microwave Background (CMB) radiation, galaxies and related phenomena at high redshift, and cosmic structure formation. Additional topics include cosmic inflation, nucleosynthesis and baryosynthesis, quasar (QSO) absorption lines, and gamma-ray bursts. Some background in general relativity is assumed.

Collision of the Milky Way Galaxy with Andromeda (forming "Milkomeda"). Created by Sal Khan.

This video lesson has the goal of introducing students to galaxies as large collections of gravitationally bound stars. It explores the amount of matter needed for a star to remain bound and then brings in the idea of Dark Matter, a new kind of matter that does not interact with light. It is best if students have had some high school level mechanics, ideally Newton's laws, orbital motion and centripetal force. The teacher guide segment has a derivation of centripetal acceleration. This lesson should be mostly accessible to students with no physics background. The video portion of this lesson runs about 30 minutes, and the questions and demonstrations will give a total activity time of about an hour if the materials are all at hand and the students work quickly. However, 1 1/2 hours is a more comfortable amount of time. There are several demonstrations that can be carried out using string, ten or so balls of a few inches in diameter, a stopwatch or clock with a sweep second hand and some tape. The demonstrations are best done outside, but can also be carried out in a gymnasium or other large room. If the materials or space are not available, there are videos of the demonstrations in the module and these may be used.

The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can collide, and grow in size by eating each other.

Chapters:
Introduction: Galaxies
Spiral Galaxies
Elliptical Galaxies
Galactic Collisions
Peculiar Galaxies
Irregular Galaxies
Review

These interactive lecture slides cover topics in Galaxies and Cosmology, aligned with the the OpenStax Astronomy textbook. Topics cover chapters 1, 5, 6, 24-30, and sections of chapter 17 and 19 concerning distance. While aligned with topics in the textbook, slides are not a 1-to-1 mapping of the textbook and contain additional content, ideas, and discussion.

Opportunities for active engagement and interaction using peer instruction techniques (think-pair-share and discussion questions) are built into the slides. References to related activities and labs are also included. Slides are provided as Google Slides documents for easy adaptation. Each chapter has a complete version of the slides along with separated slides for different topics in the chapter.

This is one part of an astronomy resource collection by Lane Community College. This collection was built by Andrea Goering (goeringa@lanecc.edu) and Richard Wagner (wagnerr@lanecc.edu), instructors of physics and astronomy at Lane Community College in Eugene, Oregon, USA. Development of these resources was funded through LCC's OER Initiative (https://inside.lanecc.edu/oer). We'd love to hear about your use of these resources! Let us know what you're using, sign up for updates, and submit corrections, suggestions, or comments here: https://forms.gle/un49RUNs55GU3ZNF6

Find the full collection here: https://docs.google.com/spreadsheets/d/142FgVMDHZ7bu53gihe3kJ_-5PzsnuzfMklJ1ZLMFk2E/edit#gid=315930953

This course provides an introduction to the universe beyond the Earth. We begin with a study of the night sky and the history of the science of astronomy. We then explore the various objects seen in the cosmos including the solar system, stars, galaxies, and the evolution of the universe itself. As an online course, it is equivalent to 6 lecture hours, and satisfies science requirements for the AA and AS degree. It is designed to be thorough enough to prepare you for more advanced work, while presenting the concepts to non-majors in a way that is meaningful and not overwhelming. We will consider the course a success if you have learned how to think about the universe critically in an organized, logical way, and to have enhanced your appreciation of the sky around us.

Introduction to Astronomy provides a quantitative introduction to the physics of the solar system, stars, the interstellar medium, the galaxy, and the universe, as determined from a variety of astronomical observations and models.

This text includes 25 reading assignments for an introductory astronomy course. They have been modified from the OpenStax Astronomy 2e and College Physics 2e (linked in related resources below) textbooks to order the topics in a logical manner for a one semester course and provide shortened (~10-20 pages) readings intended for biweekly reading assignments. The text also features enhanced treatment of the Newton's Laws, Energy, and Optics content that go beyond the typical introductory astronomy course for non-majors.

Course connections: This content was built for an introductory survey of astronomy course (e.g., PHYS 103), including apparent motions of objects in the sky, light, telescopes, solar system objects, exoplanets, the sun, stars, galaxies, and cosmology. Basic math skills (arithmetic, powers, scientific notation, unit conversions) will be used frequently. This course is designed for students in all majors.

This collection includes resources for teaching college-level introductory astronomy courses. The resources include interactive lecture slides, class activities, and projects. Topics include solar system astronomy, stellar astronomy, and galaxies and cosmology. Sample schedules are included for a sequence of three 10-week courses.This collection was created by Andrea Goering (goeringa@lanecc.edu) and Richard Wagner (wagnerr@lanecc.edu), instructors of physics and astronomy at Lane Community College in Eugene, Oregon, USA. Development of these resources was funded through LCC's OER Initiative (https://inside.lanecc.edu/oer).

This course explores the applications of physics (Newtonian, statistical, and quantum mechanics) to fundamental processes that occur in celestial objects. The list of topics includes Main-sequence Stars, Collapsed Stars (White Dwarfs, Neutron Stars, and Black Holes), Pulsars, Supernovae, the Interstellar Medium, Galaxies, and as time permits, Active Galaxies, Quasars, and Cosmology. Observational data is also discussed.

Walking up and down the hallways of Davey Lab at Penn State, you can find astronomers searching for and characterizing exoplanets, monitoring supernovae and other exploding stars, and measuring the details of the accelerating expansion of the Universe to determine the nature of dark energy. In Astro 801, we learn that with only the ability to measure the light from these distant, unreachable objects, we can still determine how the Solar System, stars, galaxies, and the Universe formed and evolved since the Big Bang. We are all citizens of the Universe, and in fact, you are made of starstuff. Come learn where the atoms in your body came from, and what will happen to them long after we are gone.

This is a computer lab activity where students view images of stars, nebulas, and galaxies and discover factors in telescope design that allow scientists to study the universe. The students will write questions about the images and produce a power point presentation on features of the universe.