Background: A red giant star is a star with a mass like the Sun that is in the last phase of its life, when Hydrogen fusion reactions in the core decrease due to the lack of fuel. With the gravitational collapse of the core, the fusion reactions now occur in a shell surrounding the core. The outer layer of the star expands enormously up to 1000 times the size of the Sun. When the Sun becomes a red giant, its volume will include the orbit of Mercury and Venus and maybe even Earth. The increased size increases the luminosity even though the outer layer cools to only 3000 K or so. The cooler outer layer causes it to be a red star. After a few more million years, the star evolves into a white dwarf-planetary nebula system.

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Was the new star a white dwarf or a red giant?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: the new star bigger or smaller than the sun?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Was the new star's Hydrogen fusion reactions increasing or decreasing?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the new star's Hydrogen fusion reactions greater or lesser than the sun?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the sun more or less bright than the new star?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the sun hotter or cooler than the new star?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the new star hotter or cooler than sun?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the sun's Hydrogen fusion reactions greater or lesser than the new star?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the new star older or younger than the sun?

Situation: Matt was going over the data sent back by the latest probe when he noticed a previously undiscovered star . The size of this star was massive, but the outer layer was only 3000 K,

Question: Is the sun older or younger than the new star?