
The black hole is very big. It has as much matter as four million Suns! It is also very far away. Dr. Ghez used these telescopes to find it.
Photo Credit: Abbie Warnock-Matthews/Shutterstock
How do we find out about the lives of people … read more
Many plants move toward the Sun. One side of the … read more
This painting covers a whole wall in Chicago. It is … read more
© 2025 McGraw-Hill Education. All Rights Reserved.