Elliptical Galaxies
Definition: Elliptical galaxies are one of the three main types of galaxies, along with spiral and irregular galaxies. They are characterized by their smooth, featureless appearance and lack of distinct spiral arms.
Structure and Characteristics
- Shape: Elliptical galaxies are named for their ellipsoidal shape, which ranges from nearly spherical (E0) to highly elongated (E7).
- Stars: They consist mainly of old stars and contain very little interstellar gas and dust.
- Size: Elliptical galaxies can range in size from small dwarf galaxies to massive giants, with the largest being over a million light-years in diameter.
- Color: They appear reddish in color due to the dominance of older, cooler stars.
Formation and Evolution
Elliptical galaxies are thought to form through the merger of smaller galaxies and the gravitational collapse of gas clouds. Their lack of ongoing star formation suggests that they are no longer actively evolving.
Study Guide
- What are the main characteristics of elliptical galaxies?
- How do the shapes of elliptical galaxies vary?
- What is the predominant type of stars found in elliptical galaxies?
- What is the color of elliptical galaxies, and what does it indicate about their stellar populations?
- What are the leading theories regarding the formation of elliptical galaxies?
Understanding the properties and formation of elliptical galaxies is essential for grasping the diversity and evolution of galaxies in the universe.
.◂Earth Science Worksheets and Study Guides High School. Stars, Galaxies, and the Universe
Worksheet/Answer key
Stars, Galaxies, and the Universe 
Worksheet/Answer key
Stars, Galaxies, and the Universe Worksheet/Answer key
Stars, Galaxies, and the Universe Worksheet/Answer key
Stars, Galaxies, and the Universe
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
EARTH AND SPACE SCIENCE (NGSS)
Earth’s Place in the Universe
Students who demonstrate understanding can:
Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe.
EARTH AND SPACE SCIENCE (NGSS)
Earth’s Place in the Universe
Students who demonstrate understanding can:
Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe.
EARTH AND SPACE SCIENCE (NGSS)
Earth’s Place in the Universe
Students who demonstrate understanding can:
Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe.
EARTH AND SPACE SCIENCE (NGSS)
Earth’s Place in the Universe
Students who demonstrate understanding can:
Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe.