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What is a galaxy?
A collection of stars, dust, gas, planets...
What is the name of our galaxy?
Milky Way
Are all galaxies the same shape?
No.
What is most probably in the middle of the Milky Way?
a giant black hole
What are stars?
Giant spheres of gas.
What is the name of our star?
Sun
Do stars live forever?
No, they don't.
What are black holes?
Places where the gravity is so strong nothing can escape it?
Can you see a black hole?
No, they are invisible, they do not reflect any light.
How do scientists observe black holes when they are invisible?
They observe the area around them where strange things usually happen.
Can a black hole absorb a star?
Yes, it can.
Do black holes live forever?
No, they don't. They evaporate.
What are comets?
Lumps of ice, dust and rocks.
What do comets do?
They orbit around the Sun.
What are constellations?
Groups of visible stars creating a pattern.
How many different constellations are there?
88
