We Aim Our Radio Telescope at a Distant Region of the Milky

question 146

Multiple Choice

We aim our radio telescope at a distant region of the Milky Way Galaxy and detect 21-cm radio waves with no Doppler shift.Which possible explanation is NOT correct?

• A) The neutral hydrogen in this region is not moving relative to Earth.
• B) The neutral hydrogen in this region is moving perpendicularly across our line of sight.
• C) The neutral hydrogen in this region is in a circular orbit around the galactic center at the same radius as the solar system.
• D) The neutral hydrogen in this region is moving away from Earth instead of toward Earth.

---

Definitions:

Placebo Effect

A positive outcome resulting from a placebo drug or treatment, not due to the placebo's actual characteristics, but instead stemming from the patient's faith in the treatment.

Transference Effect

A phenomenon in psychotherapy where a patient redirects feelings and desires, especially those unconsciously retained from childhood, onto the therapist.

Active Listening

The process of listening attentively while someone else speaks, paraphrasing and reflecting back what is said, and withholding judgment and advice.

Mental Health Providers

Professionals who offer services for the treatment and management of psychological, emotional, and behavioral issues.