Complete the following sentences:
1. An explosion that occurs at the end of a massive star's life is a _________.
2. A ___________ is a large cloud of gas and dust in space.
3. A low- or medium-mass star becomes a ____________ at the end of its life.
4. A ___________ appears to emit regular bursts of radio waves.
5. A ___________ forms from the leftover material from a supernova; it may contain as much as three times the mass of the sun.
Answer (2)
Explains the concepts of supernova, planetary nebula, and neutron star in the life cycle of stars.
Supernova: An explosion that occurs at the end of a massive star's life is a supernova. It is a dramatic event where the star releases an immense amount of energy.
Planetary Nebula: A planetary nebula is a large cloud of gas and dust in space formed when a star sheds its outer layers as it nears the end of its life.
Neutron Star: A low- or medium-mass star becomes a neutron star at the end of its life if its core mass is between 1.4 and about 3 Msun. Neutron stars are incredibly dense and small.
A supernova is the explosion at the end of a massive star's life. Nebulae are large clouds of gas and dust in space, and low- or medium-mass stars become white dwarfs. Pulsars emit radio waves, and neutron stars are dense remnants from supernovae containing significant mass.
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