What Makes Astronomers Believe That the Energy Source in Quasars

question 24

Multiple Choice

What makes astronomers believe that the energy source in quasars is only a few light months across (the distance light travels in a few months) ?

• A) we have only seen the light from such quasars for a few months so far
• B) a few light months is about the size of a typical galaxy, and astronomers think quasars are active galaxies
• C) quasars show variations in their energy output that have a period of a few months
• D) 10 light months is about the size of the belt of comets around the solar system, and that is where we believe quasars are located
• E) the Hubble Law requires objects with high red shifts (like quasars) to be pretty close to us

---

Definitions:

Patients

Individuals receiving medical treatment or under the care of a healthcare professional due to illness or injury.

Recall Notices

are alerts sent out to inform consumers of defects or issues with products that have been sold or distributed which may be a safety hazard or require repair or replacement.

Reminder Mailings

Sent communications, often via email or postal mail, intended to prompt or remind recipients about appointments, deadlines, or actions.

Appointment Cards

Physical or digital reminders provided by service providers to remind clients or patients of scheduled visits.