The document discusses black holes, beginning with how blue giant stars can go supernova and collapse into black holes due to intense gravity compressing the remains. It then mentions how the Hubble Space Telescope took the first picture of a black hole and how white holes are theorized to work in the opposite way of black holes by pushing objects out rather than pulling them in. The document concludes by stating there is still more to learn about mysterious black holes and thanks the viewer for learning some facts.

1. The Mystery of the Black Hole By: Tristan, Tiffany, Sahithya, and Sai

2. Blue Giant This is a Blue Giant, the hottest star in the galaxy. Only these types of stars can become a supernova!

3. Supernova A Blue Giant has just blasted, going supernova!

4. Black Hole With no heat pushing out against the gravity, the remains of a supernova gets compressed until it is a black hole

5. Hubble Space Telescope Here is the Hubble Space Telescope, the first amazing object to take a picture of a black hole!

6. White Holes A white hole is the opposite of a black hole. It forces objects to move out instead of a black hole, which pulls objects in

7. Still More to Black Holes Scientists are still uncovering truths about these mysterious black holes.Until then, we can find out more about black holes. ?

8. More Pictures of Black Holes

9. Thanks for watching this slide show on black holes. Hope you learned some facts about this amazing object in the galaxy!