Galaxies and Celestial Objects

Start with the objects

Parts of the Universe is a mind map covering stars, nebulae, galaxies and H-R diagrams. It is a place to begin if you want to see several terms together before answering questions. Follow it with the flashcards in Simple terms and definitions - Astrophysics, which include stars, planets, galaxies, quasars and black holes. Use the cards to check which terms you recognize and which need another look.

Move from maps to questions

After looking at the mind map, try Our galaxy. Its questions include the objects in a galaxy and the force that holds them together. Return to the map when you meet an unfamiliar term, then take another look at the question. You can also use the flashcards alongside the quiz to practice the names of celestial objects before working through the questions.

Explore black holes and radio sources

For a different kind of practice, the page includes a quiz with questions about black hole mass and Schwarzschild radius. Another quiz asks about black holes and galaxies, including why black holes appear as they do. The mind map on extragalactic radio sources offers another route through the topic, with branches on jets, black holes, physical parameters and a fluid model. Start with its main issues, then follow a branch that interests you.

Use this section in the unit

Galaxies and Celestial Objects is a section of The Universe: Structure and Scale in Astronomy. The resources give you different ways to work within that section: maps bring terms together, flashcards help you recall them, and quizzes let you practice questions. Teachers can also look through the listed formats for material to share. Choose a resource that fits what you want to study and explore it at your own pace.