The three correct answers would be:
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.
1) Stars form from nebulae.
2) Nebulae form from stars.
3) Stars explode to form nebulae.
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.
Explanation:
Nebulae and stars are closely related as they are both part of the lifecycle of stars. Nebulae are giant clouds of gas and dust in space. These nebulae can collapse under gravity, triggering the formation of new stars. The process involves the gas and dust in the nebulae coming together, getting denser and hotter, until nuclear fusion begins and a star is born.
On the other hand, stars go through different stages in their lifecycle. After a period of time, large stars will eventually run out of fuel and undergo a powerful explosion, known as a supernova. During this explosion, the outer layers of the star are expelled into space, creating a new nebula.
Therefore, stars form from nebulae, nebulae form from stars, and stars can also explode to form nebulae.