What type of object is the Stingray Nebula? __ (Low-mass stars like the Sun create these when they die. Not real Nebula. Cat's Eye is same type) Real Nebula How do real Nebulae like the Bubble Nebula compare in size to the Planetary Nebulae? __ Pillars of Creation: How can they be done If we can still see them? Rosette Nebula: If it all collapsed into stars, How many Sun-sized stars could it create? __ (Do you see how one nebula can create 1000s of stars?) Star Clusters (two-types) Omega Centauri: type of object: __ It has 10000000 stars, how closely are they spaced? __ (nearest star to the Sun over 4 light-years away) (the Pleaides are a different type of cluster called an Open Star Cluster) Galaxies Sagittarius galaxy: In type it is a d __ and e __ Where is it located? NGC3310: What type of galaxy? s __ Name another galaxy of this type: __ ( All large galaxies have one) What is in the centre of the Sombrero galaxy? __ What is special about the Milky Way? __ Notice the shape of its centro: It is a Barred Spiral galaxy. Virgo A: type of galaxy? __ (this type is the largest in the universe; Some have 100 x the mass of our galaxy.) Why are the Tadpole and Cartwheel galaxies such odd shapes? __ What is the Local Group? __ What type of object is Abell 2029? __ Which Cluster do we live in? F Funderline ( ) (a group of thousands of galaxies) When clusters of galaxies group together, it is called as Sunderline ( ) C __ How many clusters of galaxies are in the Virgo Supercluster? __ Sloan GreatWall: Groups of Superclusters are called f __ (if linear) or w __ (if planar) Observable Universe: Why can we see objects that are currently 46 billion LY away when light has had only 13.8 billion years to travel? (ie. what is space doing?)

1. The Stingray Nebula is a type of object known as a **Planetary Nebula**. These are created when low-mass stars like the Sun die and shed their outer layers.<br /><br />2. Real Nebulae like the Bubble Nebula are generally smaller in size compared to Planetary Nebulae. Planetary Nebulae can be quite large, often spanning several light-years across.<br /><br />3. The Pillars of Creation in the Eagle Nebula can still be seen because they are dense regions of gas and dust that have not yet collapsed into stars. They are obscured by the bright light of the surrounding nebula.<br /><br />4. The Rosette Nebula, if it all collapsed into stars, could potentially create thousands of Sun-sized stars. This is because the dense regions of gas and dust in the nebula can collapse under their own gravity to form new stars.<br /><br />5. Omega Centauri is a type of object known as a **Globular Cluster**. It contains approximately 10 million stars, and the stars are very closely packed together.<br /><br />6. The Sagittarius galaxy is a type of galaxy known as a **Spiral Galaxy**. It is located in the direction of the constellation Sagittarius, towards the center of the Milky Way.<br /><br />7. NGC 3310 is a type of galaxy known as a **Spiral Galaxy**. Another galaxy of this type is the Whirlpool Galaxy (M51).<br /><br />8. The center of the Sombrero galaxy contains a **Supermassive Black Hole**.<br /><br />9. The Milky Way is special because it is a **Barred Spiral Galaxy**. Its shape is unique because it has a central bar-shaped structure composed of stars.<br /><br />10. Virgo A is a type of galaxy known as a **Elliptical Galaxy**.<br /><br />11. The Tadpole and Cartwheel galaxies are odd shapes due to gravitational interactions with nearby galaxies, which have distorted their shapes.<br /><br />12. The Local Group is a group of galaxies that includes the Milky Way, Andromeda, and several smaller galaxies.<br /><br />13. Abell 2029 is a type of object known as a **Cluster of Galaxies**.<br /><br />14. We live in the **Local Group** cluster of galaxies.<br /><br />15. When clusters of galaxies group together, it is called a **Supercluster**.<br /><br />16. There are approximately 100 clusters of galaxies in the Virgo Supercluster.<br /><br />17. Groups of Superclusters are called **Superclusters** (if linear) or **Wall** (if planar).<br /><br />18. We can see objects that are currently 46 billion light-years away because the universe has been expanding for 13.8 billion years, but light takes time to travel through space. This means that the light from these distant objects has had 46 billion years to travel, allowing us to see them now.