What is the main idea behind the hypothesis discussed in the first section?
The Truth About the Sun's 'Twin' and the Dinosaurs

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Physics, Science
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11th Grade - University
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Hard
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The Sun has an evil twin that killed the dinosaurs.
All stars are part of multi-star systems.
Every star might have started with a partner.
The Sun is the only star without a sibling.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did the researchers observe about young binary stars in the Perseus molecular cloud?
They are always close together.
They tend to orbit in the same direction as their parent clouds.
They orbit in random directions.
They do not form from gas and dust.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the simulations, what happens to binary stars over time?
They always remain in pairs.
Their orbits shrink and they may become single stars.
They form new stars.
They move further apart.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Nemesis hypothesis about?
A star that could have caused the extinction of dinosaurs.
A star that is part of every binary system.
A star that is closer than 1.5 light years to the Sun.
A star that has been proven to exist.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the Nemesis hypothesis not supported by the new research?
The Sun's sibling would be too far away to affect Earth.
The Sun's sibling would be too close to remain undetected.
The Sun's sibling would have been destroyed.
The Sun's sibling would have no gravitational effect.
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