Rebecca McKenney
Frontiers of Astronomy
Mrs. Alburg
26 April 2017
Our Galactic Universe
1. Galaxies can be as large as a few thousand to several hundreds of thousands of light years across.
2. Astronomers, at the time this was released, believe that there are over a hundred billion galaxies in the universe.
3. It is estimated that a light year is 5.88 trillion miles.
4. Galaxies come in three different main type shapes. There are spiral, elliptical, and irregular.
5. Spiral galaxies usually have a large flat disk…
6. Lenticular are similar to spiral galaxies except that there is no spiral structure and most stellar formation has ceased.
7. Elliptical galaxies are smooth and elliptical in appearance. An analogy of this type of galaxy is a “cosmic football.”
8. Irregular galaxies have no definite structure and are typically small.
9. Dwarf irregular galaxies are the most common type of galaxies in the universe.
10. Astronomer Edwin Hubble is credited with classifying the different types of galaxies in 1936.
11. Hubble believed that all galaxies start off as elliptical changed into spirals later on in its life, and finally becomes a spiral galaxy. We now know that once a type of galaxy forms it does not change shape.
12. Unlike the Milky Way, most stars in different galaxies have pairs. These pairs of stars are known …show more content…
Your tour begins at the Sun, which is the star of the Solar System. Your tour guide, and pilot who is unnamed, than begins your journey across the known universe. The journey begins on January 1st at midnight. By 5:31 am, you have reached the edge of the Solar System. The tour guide decides to alter the flight path so that you can look down a view the Solar System, and “that is perpendicular to our galaxy.” (Journey) After five years, four months, and nineteen days, you arrive at Alpha Centauri, the nearest star outside of the Solar
Frontiers of Astronomy
Mrs. Alburg
26 April 2017
Our Galactic Universe
1. Galaxies can be as large as a few thousand to several hundreds of thousands of light years across.
2. Astronomers, at the time this was released, believe that there are over a hundred billion galaxies in the universe.
3. It is estimated that a light year is 5.88 trillion miles.
4. Galaxies come in three different main type shapes. There are spiral, elliptical, and irregular.
5. Spiral galaxies usually have a large flat disk…
6. Lenticular are similar to spiral galaxies except that there is no spiral structure and most stellar formation has ceased.
7. Elliptical galaxies are smooth and elliptical in appearance. An analogy of this type of galaxy is a “cosmic football.”
8. Irregular galaxies have no definite structure and are typically small.
9. Dwarf irregular galaxies are the most common type of galaxies in the universe.
10. Astronomer Edwin Hubble is credited with classifying the different types of galaxies in 1936.
11. Hubble believed that all galaxies start off as elliptical changed into spirals later on in its life, and finally becomes a spiral galaxy. We now know that once a type of galaxy forms it does not change shape.
12. Unlike the Milky Way, most stars in different galaxies have pairs. These pairs of stars are known …show more content…
Your tour begins at the Sun, which is the star of the Solar System. Your tour guide, and pilot who is unnamed, than begins your journey across the known universe. The journey begins on January 1st at midnight. By 5:31 am, you have reached the edge of the Solar System. The tour guide decides to alter the flight path so that you can look down a view the Solar System, and “that is perpendicular to our galaxy.” (Journey) After five years, four months, and nineteen days, you arrive at Alpha Centauri, the nearest star outside of the Solar