In a Recent Survey of Stars in the Sky,it Was

question 90

Multiple Choice

In a recent survey of stars in the sky,it was found that occasionally a star that is normally of constant brightness will slowly brighten and then fade back to its original brightness again over the space of several weeks.What is believed to be the cause of this change in brightness?

• A) a massive coronal ejection on a star with abnormally strong magnetic fields
• B) the gradual motion of the star through a break or hole between interstellar dust clouds
• C) microlensing by compact objects such as brown dwarfs passing in front of the star
• D) the "lighthouse beam" of a slowly rotating neutron star companion

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Definitions:

Double Standard

The application of different sets of principles for similar situations or people, often leading to unequal treatment based on gender, race, or another criterion.

Chronic Illnesses

Long-term health conditions that often require ongoing management through medication, lifestyle adjustments, and other treatments.

Physical Health

The condition of a person's body, including the absence of illness or injury, often maintained through regular exercise, a balanced diet, and adequate rest.

Middle Life

A period of human life, typically between young adult and old age, marked by the presence of mid-life transitions and reevaluations.