Question 1

True or false: W Hydrae is a red giant star located in the constellation Hydra, the Water Snake.

Accepted Answer

True. W Hydrae is indeed a red giant in the constellation Hydra, known for its large size and variability.

Question 2

True or false: W Hydrae is one of the brightest stars visible to the naked eye from Earth.

Accepted Answer

False. W Hydrae is a variable star that usually requires binoculars or a small telescope to see, not naked-eye bright.

Question 3

True or false: W Hydrae's diameter is roughly the size of Earth's orbit around the Sun.

Accepted Answer

False. W Hydrae is huge—its diameter is about 400 times the Sun's, far larger than Earth's orbit, which is only 2 solar diameters.

Question 4

True or false: W Hydrae is thought to be in the final stages of its life, soon to become a white dwarf.

Accepted Answer

True. As an evolved red giant, W Hydrae is shedding its outer layers and will eventually leave behind a white dwarf.

Question 5

True or false: W Hydrae is located over 10,000 light-years away from Earth.

Accepted Answer

False. W Hydrae is about 300–400 light-years away, much closer than 10,000 light-years.

Question 6

True or false: W Hydrae has a companion star that orbits it every 12 years.

Accepted Answer

True. High-resolution observations show W Hydrae has a faint binary companion with an orbital period of about 12 years.

Question 7

True or false: W Hydrae is a type of star called a Mira variable, pulsing every 11 months.

Accepted Answer

False. W Hydrae is a semiregular variable, not a Mira; its pulsation period is around 380 days, not exactly 11 months.

Question 8

True or false: The dust around W Hydrae contains water vapor, which is rare for a star's envelope.

Accepted Answer

True. Observations with the Herschel Space Telescope detected water vapor in the dust shell around W Hydrae, unusual for a cool red giant.

W Hydrae Trivia Questions