Physical Cosmology
Learn the answers to questions about physical cosmology - the study of the origin and evolution of the universe.
Learn the answers to questions about physical cosmology - the study of the origin and evolution of the universe. Less
How do hydrogen bombs work?
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Hydrogen bombs, or H-bombs, never were used in World War II, even though the idea for them was...
Craig C. Freudenrich
and 1 other
What are nebulae?
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Nebulae (the plural of nebula) are very thin clouds of gas and dust that can cover vast areas of...
Discovery Channel
Site Director, Curiosity.com
Are asteroids massive rocks that fly around in all directions?
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Most asteroids are the size of pebbles, and they tend to rotate around the sun just as the Earth...
Discovery Channel
Site Director, Curiosity.com
What brought you to the field of astronomy?
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TRANSCRIPT: Well, I come from a traditional Ukrainian family that grew up in Canada. My mother has...
Dr. Evgenya Shkolnik
Astronomer, Lowell Observatory
and 2 others
What keeps you looking up at the heavens every night?
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TRANSCRIPT: Well, I don't do it every night, so I don't get too burned out, but I'm in the middle...
Dr. Lisa Prato
Astronomer, Lowell Observatory
and 1 other
How do we measure the distances to stars?
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TRANSCRIPT: For stars, it's very difficult to determine their distances. One of the things that...
Dr. Gerard van Belle
Astronomer, Lowell Observatory
Does the size of a star determine the size of its habitable zone?
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TRANSCRIPT: So a star that's smaller than the sun is going to be cooler than the sun. It has less...
Dr. Gerard van Belle
Astronomer, Lowell Observatory
