Exploring the Largest Stars in the Universe

How many Earths could fit inside the sun?

• About ten thousand

• About a hundred thousand

• About a billion

• About a million

What is the term used to compare the size of stars to our sun?

• Solar diameter

• Solar volume

• Solar mass

• Solar radii

Which star was once thought to be the largest observed star?

• VY Canis Majoris

• UY Scuti

• Stephenson 2-18

• Betelgeuse

What process leads to the formation of a protostar?

• Chemical reaction

• Magnetic attraction

• Gravitational collapse

• Nuclear fission

What is the main element fused in the core of a star to maintain its stability?

• Hydrogen

• Carbon

• Oxygen

• Helium

What happens to a star when it exhausts its hydrogen supply?

• It explodes into a supernova

• It becomes a black hole

• It remains unchanged

• It contracts and then expands

What is the Eddington limit?

• The maximum size a star can reach

• The maximum luminosity a star can achieve without bursting

• The minimum temperature for nuclear fusion

• The maximum distance a star can be from Earth

What is one theory that explains how stars can exceed the Eddington limit?

• Atmospheric porosity

• Magnetic resonance

• Gravitational lensing

• Quantum tunneling

What is the phenomenon called when a star's luminosity exceeds the Eddington limit?

• Redshift

• Hypernova

• Super Eddington

• Supernova

What is a potential outcome for a star like Stephenson 2-18 as it evolves?

• It becomes a neutron star

• It becomes a brown dwarf

• It turns into a luminous blue variable star

• It forms a planetary nebula