ASTRO 7N EXAM 2 PRACTICE STUDY GUIDE
2026 SOLVED QUESTIONS
◉ Sirius (Dog Star). Answer: Brightest star in the sky
◉ Red Dwarfs. Answer: Which stars are located on the lower right of
the HR Diagram?
Cool, faint, small
◉ Blue Giants. Answer: Which stars are located on the upper left of
the HR Diagram?
Hot, bright, large
◉ Red Giants/Supergiants. Answer: Not on the main sequence
Burning helium and other elements in their cores (not hydrogen)
Starting to die
Large and very luminous
Cooler
Top right of HR DIagram
◉ Stellar nursery, protostar, main sequence, red giant, planetary
nebula, white dwarf. Answer: Sun's History
, ◉ Planetary Nebula. Answer: Ejected envelope (the layers of the
core) of a low to intermediate mass star
◉ White Dwarf. Answer: End state of a star's core
About the size of the Earth
◉ Brown Dwarfs. Answer: Failed stars
Don't heat up enough to have nuclear reactions in their core
◉ Onion Skin Model. Answer: When a massive star burns through
hydrogen and then helium and then more massive elements it leaves
behind layers
Concentric shells of fusion zones involving different chemicals
◉ Iron. Answer: Stable element that stops the burning of a star
◉ Type II Supernova. Answer: Violent explosion with the star's core
left behind
Creates an environment for the fusion of elements heavier than iron
to form
2026 SOLVED QUESTIONS
◉ Sirius (Dog Star). Answer: Brightest star in the sky
◉ Red Dwarfs. Answer: Which stars are located on the lower right of
the HR Diagram?
Cool, faint, small
◉ Blue Giants. Answer: Which stars are located on the upper left of
the HR Diagram?
Hot, bright, large
◉ Red Giants/Supergiants. Answer: Not on the main sequence
Burning helium and other elements in their cores (not hydrogen)
Starting to die
Large and very luminous
Cooler
Top right of HR DIagram
◉ Stellar nursery, protostar, main sequence, red giant, planetary
nebula, white dwarf. Answer: Sun's History
, ◉ Planetary Nebula. Answer: Ejected envelope (the layers of the
core) of a low to intermediate mass star
◉ White Dwarf. Answer: End state of a star's core
About the size of the Earth
◉ Brown Dwarfs. Answer: Failed stars
Don't heat up enough to have nuclear reactions in their core
◉ Onion Skin Model. Answer: When a massive star burns through
hydrogen and then helium and then more massive elements it leaves
behind layers
Concentric shells of fusion zones involving different chemicals
◉ Iron. Answer: Stable element that stops the burning of a star
◉ Type II Supernova. Answer: Violent explosion with the star's core
left behind
Creates an environment for the fusion of elements heavier than iron
to form
