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's diameter is roughly the size of Earth's orbit around the Sun.

Accepted Answer

False. W Hydrae is a red giant with a diameter around 3.7 AU, while Earth's orbit diameter is 2 AU. Thus, the star's diameter is much larger, not roughly the same.

Question 3

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 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 one of the brightest stars visible to the naked eye from Earth.

Accepted Answer

False. W Hydrae is a variable star whose apparent magnitude ranges from about 5.6 to 10.0, requiring binoculars or a small telescope to see most of the time, and it is nowhere near the brightness of prominent naked-eye stars.

Question 6

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 7

True or false: W Hydrae is a variable star with a pulsation period of approximately 382 days.

Accepted Answer

True. W Hydrae is classified as a Mira-type variable, known for its regular brightness fluctuations over a cycle of about 382 days.

Question 8

True or false: The dust around W Hydrae contains water vapor, as detected by the Herschel Space Telescope.

Accepted Answer

True. The Herschel Space Observatory detected water vapor in the circumstellar dust of W Hydrae, a red giant star, confirming the presence of this molecule in its outer envelope.

W Hydrae Trivia Questions