A Wonderleaf question
What is a black hole?
a real page from the book
A black hole is a region of space where gravity is so strong that nothing can escape once it passes the event horizon. It can form after a very massive star collapses, squeezing a huge amount of matter into an extremely small place.
Black holes are not roaming space vacuums. From far away, they pull like any other object with the same mass. Astronomers spot them by watching nearby gas heat and glow, or by tracking stars moving around something unseen.
Wonder words
- gravity
- horizon
- mass
- galaxy
Try it out
Place a heavy ball on a blanket and roll smaller balls nearby to watch how curved fabric changes their paths.
Read the whole picture book
Watercolour scenes, straight answers, about three minutes cover to cover.
Open the picture bookKeep wondering
- How do satellites stay in orbit?
- Could people live on Mars someday?
- What is a shooting star?
- Why do astronauts float in space?
- Why is space so dark?
- Why is the moon sometimes out during the day?
And the next question?
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