Test your Cosmic Knowledge here
1. What process makes stars shine by turning hydrogen into helium?
2. How can we tell the temperature of a star just by looking at it?
3. About how many stars are in our Milky Way galaxy?
4. Do most stars live alone, or do they often exist in pairs and groups?
5. Why do the biggest stars live shorter lives than smaller stars?
6. What can very massive stars turn into when they die?
7. What do we call stars that change brightness and help scientists measure distances in space?
8. How heavy would a teaspoon of a star’s material be if brought to Earth?
9. What type of star is our Sun classified as?
10. What kind of star spins so fast that it sends beams of light like a cosmic lighthouse?
Answer Key: 1. Nuclear fusion
2. By its color (blue = hottest, red
= coolest) 3. 100–400 billion stars
4. Many stars are in binary or
multiple star systems 5. They
burn their fuel much faster
6. Black holes 7. Variable stars
8. It could weigh tons (very dense
matter) 9. A yellow dwarf star
(medium-sized)
10. A neutron star (pulsar)
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