Weegy: The Milky Way is held together by a black hole's gravitational force. Since the stars near this black hole move at a high speed, you can infer the black hole by its size.
User: Which scientist developed the theory of gravitation and used it to explain the orbits of celestial bodies?
Question 17 options:
A)
Johannes Kepler
B)
Galileo Galilae
C)
Copernicus
D)
Isaac Newton
Weegy: Isaac Newton is the scientist who developed the theory of gravitation and used it to explain the orbits of celestial bodies.
User: What's responsible for preventing the gas giants from collapsing into a star?
Question 18 options:
A)
Their large masses decrease the gravity they experience.
B)
They're too far from the sun to begin collapsing into a star.
C)
Their fast rotation rates result in centrifugal force.
D)
The sun exerts tidal forces that prevent collapse into a star.
Weegy: Their fast rotation rates result in centrifugal force is responsible for preventing the gas giants from collapsing into a star.
User: What's the role of the sun's gravity in the solar system?
Question 19 options:
A)
Prevents the sun from falling into a black hole
B)
Keeps planets moons in orbit
C)
Keeps the planets orbiting around the sun
D)
Slowly pushes the planets away from the sun
Weegy: Keeps the planets orbiting around the sun. - is the role of the sun's gravity in the solar system.
User: How can you determine that a star is about to turn into a red giant?
Question 20 options:
A)
When the pressure inside the star exceeds its temperature
B)
When a large amount of helium has turned into hydrogen
C)
When a large amount of hydrogen has been turned into helium
D)
When the star falls into the sun
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